WO2005075954A1 - ベンゼン検出素子およびその製造方法 - Google Patents
ベンゼン検出素子およびその製造方法 Download PDFInfo
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- WO2005075954A1 WO2005075954A1 PCT/JP2004/018932 JP2004018932W WO2005075954A1 WO 2005075954 A1 WO2005075954 A1 WO 2005075954A1 JP 2004018932 W JP2004018932 W JP 2004018932W WO 2005075954 A1 WO2005075954 A1 WO 2005075954A1
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- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 title claims abstract description 387
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000011148 porous material Substances 0.000 claims abstract description 152
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 86
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 43
- 125000000524 functional group Chemical group 0.000 claims abstract description 41
- 230000000737 periodic effect Effects 0.000 claims abstract description 18
- 125000005372 silanol group Chemical group 0.000 claims abstract description 13
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims abstract description 9
- 239000002105 nanoparticle Substances 0.000 claims description 67
- 238000001514 detection method Methods 0.000 claims description 64
- -1 dimethylphenylsilyloxy group Chemical group 0.000 claims description 15
- 239000002244 precipitate Substances 0.000 claims description 10
- 125000005371 silicon functional group Chemical group 0.000 claims description 10
- 239000002243 precursor Substances 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 6
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 claims description 4
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 claims description 4
- 238000005245 sintering Methods 0.000 claims description 4
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 3
- 230000035945 sensitivity Effects 0.000 abstract description 8
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 42
- 239000007789 gas Substances 0.000 description 36
- 125000001424 substituent group Chemical group 0.000 description 22
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical group CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 19
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 12
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 12
- 239000000126 substance Substances 0.000 description 11
- 239000000243 solution Substances 0.000 description 10
- 229940078552 o-xylene Drugs 0.000 description 9
- 238000005259 measurement Methods 0.000 description 8
- 238000000926 separation method Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000001179 sorption measurement Methods 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 238000003786 synthesis reaction Methods 0.000 description 4
- 239000010409 thin film Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- 239000003463 adsorbent Substances 0.000 description 3
- 239000007822 coupling agent Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 239000003929 acidic solution Substances 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- 229920001400 block copolymer Polymers 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000001308 synthesis method Methods 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- ZVMDAQQBXVFTTI-UHFFFAOYSA-N [Si]OCCC1=CC=CC=C1 Chemical compound [Si]OCCC1=CC=CC=C1 ZVMDAQQBXVFTTI-UHFFFAOYSA-N 0.000 description 1
- 238000004847 absorption spectroscopy Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- DALDUXIBIKGWTK-UHFFFAOYSA-N benzene;toluene Chemical compound C1=CC=CC=C1.CC1=CC=CC=C1 DALDUXIBIKGWTK-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 150000002605 large molecules Chemical class 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 238000011896 sensitive detection Methods 0.000 description 1
- 230000005476 size effect Effects 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 230000003335 steric effect Effects 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000013076 target substance Substances 0.000 description 1
- 230000008685 targeting Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
- B01J20/28078—Pore diameter
- B01J20/28083—Pore diameter being in the range 2-50 nm, i.e. mesopores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
- B01J20/28095—Shape or type of pores, voids, channels, ducts
- B01J20/28097—Shape or type of pores, voids, channels, ducts being coated, filled or plugged with specific compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
- B01J20/3202—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the carrier, support or substrate used for impregnation or coating
- B01J20/3204—Inorganic carriers, supports or substrates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
- B01J20/3231—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the coating or impregnating layer
- B01J20/3242—Layers with a functional group, e.g. an affinity material, a ligand, a reactant or a complexing group
- B01J20/3244—Non-macromolecular compounds
- B01J20/3246—Non-macromolecular compounds having a well defined chemical structure
- B01J20/3257—Non-macromolecular compounds having a well defined chemical structure the functional group or the linking, spacer or anchoring group as a whole comprising at least one of the heteroatoms nitrogen, oxygen or sulfur together with at least one silicon atom, these atoms not being part of the carrier as such
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
- B01J20/3231—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the coating or impregnating layer
- B01J20/3242—Layers with a functional group, e.g. an affinity material, a ligand, a reactant or a complexing group
- B01J20/3244—Non-macromolecular compounds
- B01J20/3246—Non-macromolecular compounds having a well defined chemical structure
- B01J20/3257—Non-macromolecular compounds having a well defined chemical structure the functional group or the linking, spacer or anchoring group as a whole comprising at least one of the heteroatoms nitrogen, oxygen or sulfur together with at least one silicon atom, these atoms not being part of the carrier as such
- B01J20/3261—Non-macromolecular compounds having a well defined chemical structure the functional group or the linking, spacer or anchoring group as a whole comprising at least one of the heteroatoms nitrogen, oxygen or sulfur together with at least one silicon atom, these atoms not being part of the carrier as such comprising a cyclic structure not containing any of the heteroatoms nitrogen, oxygen or sulfur, e.g. aromatic structures
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B37/00—Compounds having molecular sieve properties but not having base-exchange properties
- C01B37/02—Crystalline silica-polymorphs, e.g. silicalites dealuminated aluminosilicate zeolites
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/33—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using ultraviolet light
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0011—Sample conditioning
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—Specially adapted to detect a particular component
- G01N33/0047—Specially adapted to detect a particular component for organic compounds
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T436/00—Chemistry: analytical and immunological testing
- Y10T436/21—Hydrocarbon
- Y10T436/212—Aromatic
Definitions
- the present invention relates to a benzene detecting element for selectively and highly sensitively detecting benzene in the atmosphere and a method for producing the same.
- Non-Patent Document 1 As a detection element for selectively and highly sensitively detecting benzene present in a trace amount in the air, there is a detection element that adsorbs and concentrates a target molecule using an adsorbent (Non-Patent Document 1).
- This adsorbent utilizes a substituent having a high affinity for benzene and similar aromatic molecules.
- this conventional method is a separation method that uses only physicochemical properties and is not suitable for separating benzene molecules from molecules having similar properties and structures to benzene.
- a method using a device using a host molecule having a site that recognizes only the benzene molecule can be considered.However, the production requires a complicated synthesis process, and the reactivity is extremely low and stable like benzene. For large molecules, the synthesis of the device is more difficult.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2003-021595
- Non-Patent Document 1 New Experimental Chemistry Course 9 "Analytical Chemistry II” edited by The Chemical Society of Japan Maruzen Co., Ltd.
- Non-Patent Document 2 A. Stein, B.J.Melde, RC Schroden, Adv. Mater. 12 (19), 1403 (2000)
- An object of the present invention is to provide a detection element made of mesoporous silica, which selectively and highly sensitively detects benzene present in a trace amount in the atmosphere.
- the detector was designed appropriately so that the difference in affinity between the benzene molecule and the aromatic molecule similar to benzene occurred.
- Another object of the present invention is to provide a method for manufacturing the above-described detection element using a relatively simple synthesis method.
- a benzene detection element according to the present invention is a benzene detection element made of mesoporous silica for detecting benzene in the atmosphere selectively and with high sensitivity.
- This detection element has nano-sized pores having a highly ordered periodic pore structure, and has sub-nano-sized pores on the wall surface of the nano-sized pores.
- the pores have a radius of 0.15 nm to 50 nm, and the pores of the sub-nano size have a pore diameter of 0.05 nm and a force of 0.5 nm, and at least a sub-nano size of the pores.
- the organosilicon functional group is preferably a dimethylphenylsilyloxy group (Me PhSi—).
- Nano-sized pores have a cubic structure
- the nano-sized pores have a radius of 1.5 nm and a diameter of 2.
- Onm has sub-nano-sized pores on the wall surface of the nano-sized pores in such a structure as to connect the nano-sized pores. It is characterized by being present.
- EO-PO-EO ethylene oxide
- PO propylene oxide
- a benzene detection element having nano-sized pores having a pore structure and having sub-nano-sized pores on the wall surface of the nano-sized pores is obtained.
- Heating is preferably performed in a temperature range of 30 ° C to 130 ° C.
- Sintering is preferably performed at a temperature of 450 ° C-600 ° C.
- a nano-sized pore has a pore diameter of 50 nm from 0.15 nm radius, and the sub-nano-sized pore has a detection element having a pore diameter of 0.15 to 0.5 nm.
- a silane coupling agent having a phenyl group is reacted with a benzene detection element, and an organic silicon functional group having a phenyl group is introduced into at least the sub-nano-sized pores. It is preferable to further include Preferably, the organic silicon functional group is a dimethylphenylsilyl group.
- the present invention in mesoporous silica, the periodic structure of sub-nano-sized pores therein, the pore size of sub-nano-sized pores, the type and density of substituents on the surface inside the sub-nano-sized pores, and Controlling affinity between sub-nano-sized pore inner surface and benzene molecule By doing so, it is possible to selectively and highly sensitively detect a small amount of benzene present in the atmosphere.
- the present invention has shown that the present invention provides a benzene detecting element capable of selectively and highly sensitively detecting benzene present in a trace amount in the atmosphere and a method for producing the same.
- FIG. 1 is a view for explaining the features of the present invention when a target molecule is adsorbed and detected using a substituent having a high affinity for the target molecule.
- FIG. 2 is a view showing characteristics of a detection element of the present invention.
- FIG. 3 is a view showing a flow of a method for producing a material of the present invention.
- FIG. 4 is a view for explaining an apparatus used in the present invention in Example 1.
- FIG. 5A is a diagram comparing the signal intensities of benzene, toluene, and o-xylene when benzene gas was detected by the conventional method using the apparatus shown in FIG. 4 in Example 1.
- 5B is a diagram comparing the signal intensities of benzene, toluene, and o-xylene when benzene gas is detected according to the present invention using the apparatus shown in FIG. 4 in Example 1.
- FIG. 6A is a diagram showing signal intensity of benzene according to a conventional method in Example 2.
- FIG. 6B is a diagram showing the signal intensity of benzene according to the present invention in Example 2.
- the present invention relates to a benzene detecting element composed of mesoporous silica having a three-dimensionally ordered periodic pore structure and a method for producing the same.
- the detection element of the present invention has nano-sized pores and has sub-nano-sized pores on its wall surface.
- the present invention provides a benzene detection element in which the pore size of the sub-nano-sized pores and the characteristics of the sub-nano-sized pore surface are controlled so as to be suitable for selective detection of benzene. Further, the present invention provides a simple method for producing a benzene detecting element having such characteristics.
- control refers to the physical structure of the surface inside the pore and the interaction between the surface inside the pore and the target molecule (benzene molecule). The appropriate selection is made so that the target molecule can be selectively adsorbed on the detection element (that is, Adjusting the pore size within a specific range or introducing an appropriate substituent on the pore surface).
- the detection element of the present invention comprises a mesoporous silica having a nano-sized highly ordered periodic pore structure, wherein (i) the shape and size of pores, and (ii) the species of the substituent on the surface inside the pores. (Iii) affinity with the molecule to be detected by selecting various substituents on the inner surface of the pore (hereinafter also referred to as benzene molecule or target molecule). Is controlled so as to be compatible with the target molecule. In the present invention, it is particularly preferable to control sub-nano-sized pores. As a result, benzene molecules can be selectively adsorbed on the detection element.
- the detection element according to the present invention is, for example, as shown in (A-1) (a) and (b) of FIG. It has a highly ordered periodic pore structure.
- the detection element according to the present invention has a highly ordered (eg, hexagonal, cubic, or lamellar pore shape) nanosize described in (a-1) and (b) of FIG. These nano-sized pores have sub-nano-sized pores (hereinafter also referred to as micro-pores) formed on the wall surface.
- the mesopores are as shown by pores 32 and the micropores are as shown by pores 34.
- the shape and diameter of sub-nano-sized pores are controlled so as to be suitable for selective detection of benzene, and the surface of the pores has various substituents (for example, hydroxyl groups).
- an organic functional group for example, an organic silicon functional group
- the detection element is mesoporous silica as described above, and has a three-dimensionally highly ordered periodic pore structure.
- the nano-sized pore has a radius of 0.5 nm or more and 50 nm or less
- the sub-nano size present on the nano-sized pore wall surface is:
- it has a radius of not less than 0.05 nm and not more than 0.5 nm.
- at least the surface of the subnanometric pore is modified with a substituent having an affinity for benzene (for example, a silanol group) or an organic functional group (for example, an organic silicon functional group).
- the detection element preferably has a periodic cubic structure, which has nano-sized pores arranged in a high order. It is preferable that sub-nano-sized pores exist on the wall surface so as to connect the nano-sized pores. Further, the nano-sized pores preferably have a radius of 15 nm-2.5 nm. The sub-nano-sized pores preferably have a radius larger than half of the molecular size of benzene (about 0.3 nm). Preferably has a range of 0.2-0.5 nm (ie 0.15 nm 0.5 nm, preferably 0.2 nm-0.5 nm).
- the pore size distribution of the sub-nano-sized pores has a half width at the center thereof of not more than 0.06 nm, preferably 0.05 nm ⁇ 0.0 Olnm. That is, the benzene detection element of the present invention has a size that is larger than the size that can accommodate only one benzene molecule, and that is difficult to adsorb other molecules (for example, toluene).
- the half width is 0.06 nm or less as described above, but if this distribution is increased, molecules other than benzene will enter.
- nano-sized pores have a periodic structure.
- the pore structure of the subnanosize does not need to be periodic. Therefore, the term “periodic structure” or “three-dimensional periodic structure” as used herein refers to a structure targeting nano-sized pores.
- both the nano-sized pores and the sub-nano-sized pores have a uniform diameter.
- the surface of the pore particularly the surface of the sub-nano-sized pore, preferably contains a silanol group as a substituent.
- the surface of the sub-nano-sized pores is more preferably modified with an organic functional group having a phenyl group.
- the organic functional group is most preferably a dimethylphenylsilyl group, preferably a dimethylphenylsilyl, methylphenylsilyl or diphenylsilyl group.
- the organic functional group is bonded to the surface of the pores of the mesoporous silica by one Si_ ⁇ _ bond as shown in Table 1 below. [Table 1]
- the organic functional group can move relatively freely on the mesoporous silica, and the detection molecule (benzene) Molecules) are likely to interact with phenyl groups on organic functional groups.
- the organic functional group is bonded by two Si_ ⁇ _ groups on the mesoporous silica as shown in (C)
- the organic functional group cannot move freely and the detection molecule (benzene molecule)
- organic functional groups may be reduced.
- the three-dimensional structure inside the pores is made a structure that can easily take in benzene, and the affinity for benzene is further increased. Can be.
- ADVANTAGE OF THE INVENTION The benzene detection element of this invention can enhance the benzene adsorption
- the present invention also provides a method for introducing an organic functional group into the pores of the mesoporous silica having the above-mentioned nano-sized highly ordered periodic pore structure after the synthesis, or by adding an acid or Selective separation of benzene molecules by controlling the types of substituents (for example, silanol groups) and densities on the inner surface of the pores by chemical substances such as alkali and physical oxidation-reduction reactions so as to be suitable for adsorption of benzene molecules. Concentration can be realized.
- benzene in the mesoporous silica having a pore structure used in the present invention, when an organic functional group having a substituent having a high affinity for benzene (for example, an organic silicon functional group) is immobilized inside the pore, benzene can be obtained.
- the interaction between a molecule and its functional groups is not limited to one direction such as a two-dimensional surface.For example, benzene molecules interact with functional groups above and below pores, and these interact in three dimensions. become. Such an effect is also considered to be a factor that enables highly selective separation of benzene molecules.
- the present invention provides a method for producing the benzene detecting element.
- a solution containing a substance having pores of ⁇ type is heated to a temperature of 30 to 130 ° C., and a silica precursor is added thereto to form a precipitate. After drying, it is sintered at a predetermined temperature.
- the benzene detecting element of the present invention can be used.
- Certain mesoporous silica can be obtained.
- EO is the substance that forms nano-sized pores.
- F127 (Hereinafter referred to as F127).
- a force F127 that can use, for example, E ⁇ 20_P ⁇ 70-EO20, in addition to the above-mentioned F127, as the ⁇ -type substance.
- the reason is that there may be a difference in selectivity between the mesoporous silicas obtained from these type II.
- the reason for the difference in selectivity is that when EO20-PO70-EO20 is used as the ⁇ -type material, the surface area of the nano-sized pores of the obtained mesoporous silica (hexagonal) is determined by using F127. It is considered that the number of exposed sub-nano-sized pores is reduced in the mesoporous silica obtained by using EO20-PO70-EO20, which is smaller than the obtained mesoporous silica (cubic).
- a solution containing the above-mentioned type I substance (F127) (for example, a dilute hydrochloric acid solution) is heated to a temperature of 30 ° C to 130 ° C to use a silica precursor (for example, TEOS (tetraethyl orthosilicate)). Is added) to form a precipitate. After drying the precipitate, it is sintered at a temperature of 450 ° C. to 600 ° C. to obtain the benzene detecting element of the present invention.
- a silica precursor for example, TEOS (tetraethyl orthosilicate)
- reaction temperature temperature of the solution
- sintering temperature exceeds 600 ° C
- crystallization may proceed and pores may be reduced.
- the density of the silanol groups on the surface of the pores decreases, and the selective adsorption of the target molecule may not occur.
- the temperature is lower than 450 ° C, there is a possibility that the removal of the block copolymer or the like of the substance having the pores of the ⁇ type becomes insufficient.
- the silica precursor is added to the ⁇ -type solution as described above, and then applied onto a base material (for example, a waveguide type chip) to form a thin film, and the ⁇ -type substance is removed. It is easier to form a detection element.
- a base material for example, a waveguide type chip
- the benzene detecting element obtained by the method of the present invention has a three-dimensionally ordered periodic nano-sized pore structure, and sub-nano-sized pores are formed on the wall surface. Exists.
- the mesoporous silica produced as described above has silanol groups.
- Said sila Knol groups can be increased, for example, by treatment with aqueous sulfuric acid and hydrogen peroxide.
- silanol groups can be reduced and hydrophilicity can be reduced.
- hydrochloric acid, nitric acid, sulfuric acid and the like can be used. These solutions preferably have, for example, a pH of 16.
- the pore surface can be made hydrophilic. That is, it is possible to control the amount of silanol groups on the surface of the pores.
- a coupling agent is allowed to act on the mesoporous silica to modify the pore surface with a functional group.
- the functional group is an organic functional group, most preferably a dimethylphenylsilyl group, preferably a dimethylphenylsilyl, methylphenylsilyl or diphenylsilyl group.
- the silane coupling agent reacts with silanol groups on the surface of the pores of the mesoporous silica, and the organic silicon functional groups are bonded to the surface of the pores.
- a detection element is manufactured using a specific mesoporous silica precursor, and the pore surface of the obtained detection element is modified with a specific organic functional group such as a dimethylphenylsilyl group. Is most preferred. This is because the detection element of the present invention has a specific crystal structure, and by modifying the inside of its pores with a specific organic functional group, it is possible to selectively detect benzene molecules.
- the benzene detection element of the present invention can improve the pore size by appropriately selecting the pore size, the type and size of the functional group introduced into the pore, and / or the density.
- benzene can be selectively detected using the above-described detection element.
- the detection method includes, for example, a separation unit including the detection element of the present invention for selectively separating benzene molecules and a detection unit for detecting a target substance separated by the separation unit. It can be carried out by a device provided at least.
- a separation unit including the detection element of the present invention for selectively separating benzene molecules and a detection unit for detecting a target substance separated by the separation unit. It can be carried out by a device provided at least.
- An example of such an apparatus is disclosed in, for example, Japanese Patent Application Laid-Open No. 2003-021595 (Patent Document 1).
- the detection unit can be incorporated in the separation unit.
- the benzene molecules selectively adsorbed to the detection element are released, for example, by heating, and the force for optically measuring the released concentrated gas or the benzene molecule is applied to the detection element. It is possible to apply a method such as optical measurement in the state of adsorption and concentration of S.
- the optical measurement method is not particularly limited, and for example, an ultraviolet light detector or the like can be used.
- the target molecule can be detected.
- the benzene detecting element of the present invention was manufactured as follows.
- Figure 3 shows the flow of the manufacturing method.
- Block copolymer E ⁇ -PO-EO E ⁇ : ethylene oxide, PO: propylene oxide
- mesoporous silica (SBA-16) having two kinds of uniform pores, ie, nano-sized pores having a diameter of 4. Onm and pores having a sub-nano size of 0.44 nm was obtained. At this time, the nano-sized pores have a cubic periodic structure, and the sub-nano-sized pores exist so as to connect them to the wall surface of the nano-sized pores.
- the pore surface of the mesoporous silica thus produced had 40% to 60% silanol groups.
- the surface of mesoporous silica can be modified with an optional organic functional group by selecting a coupling agent, and its density can be controlled by the above-described surface treatment.
- Non-Patent Document 2 reports of examples of resilience and shoes.
- Me PhEtO_Si dimethyl
- Phenylethoxysilane was used as the coupling agent.
- the functional group modification process was performed in argon gas using a Teflon vessel.
- the micro flow cell includes a concentration cell 1 and a measurement cell 2, and the concentration cell 1 should be filled with a gas flow path 11 for flowing a gas to be measured and the gas flow path 11.
- a benzene detecting element 12 and a thin film heater 13 for heating a substance adsorbed and fixed to the benzene detecting element 12 are provided.
- the measurement cell 2 is provided with an ultraviolet light path and gas flow path 21 through which the gas of the substance to be measured flows through the gas flow path 11 and through which ultraviolet light for measurement passes.
- a connection flow path 3 for connecting and communicating the gas flow path 11 and the ultraviolet light path / gas flow path 21 and a gas introduction flow path 14 for flowing a gas to be measured into the gas flow path 11 of the concentration cell 1.
- Reference numeral 4 denotes a pump for introducing a gas into the gas introduction flow path 14, 15 denotes a power supply for heating the thin film heater 13, 5 denotes an ultraviolet light for injecting ultraviolet light into the ultraviolet light path / gas flow path 21.
- a light source, 5a is a lens for ultraviolet light, 6 is an ultraviolet detector for detecting the emitted ultraviolet light, and 7 is a personal computer.
- Air containing benzene is introduced by the pump 4 into the gas introduction passage 14 and the gas passage 11 of the condensing cell 1 and filled in the gas passage 11.
- the benzene gas is absorbed and fixed to the benzene detection element 12.
- the thin film heater 13 is heated by supplying power from the power supply 15 and the benzene gas adsorbed on the benzene detection element 12 is heated to a desorption temperature to desorb benzene.
- the desorbed and separated gas is introduced into the ultraviolet light path / gas flow path 21 of the measurement cell 2 via the connection flow path 3.
- the optical fiber connected to the ultraviolet light source 5 and the ultraviolet detector 6 detects contaminants by absorption spectroscopy.
- the gas after the measurement is discharged from the gas discharge channel 22.
- the data is processed by the personal computer 7.
- Toluene and o-xylene are molecules whose structural 'shape' properties are very similar to benzene, and it is difficult to selectively adsorb benzene using conventional materials.
- the detection signal intensity ratio of benzene: toluene: o_xylene was about 10: 1: 1, indicating that the detection sensitivity to benzene was increased (FIG. 5A— 5B).
- FIG. 5A is a graph showing the signal intensity of the conventional benzene detecting element
- FIG. 5B is a graph showing the signal intensity of the benzene detecting element of the present invention. Specifically, as shown in FIG.
- benzene, toluene, and o-xylene had the same signal intensity in the concentration range of 0 to 100 ppm (note that in FIG. White square) and o-xylene (black triangle). Also, as shown in FIG. 5B, toluene and o-xylene had the same intensity in the concentration range of 0-100 ppb. Benzene was 10 times more active than toluene and o-xylene in this concentration range. Signal strength.
- the present invention can selectively detect a trace amount of benzene in the atmosphere with high sensitivity.
- FIG. 6A is a graph showing the signal intensity of the conventional benzene detecting element
- FIG. 6B is a graph showing the signal intensity of the benzene detecting element of the present invention. From the above, using the present invention, It was shown that a trace amount of benzene in the air can be selectively detected with high sensitivity.
- the benzene molecule can be detected even when modified with the organic functional group having a substituent shown in Tables (B) and (C) above, but the selectivity is (A).
- the mesoporous silica modified with the functional group having a substituent of ()) is superior.
- the selectivity of the mesoporous silica modified with the substituent (B) was reduced in combination with SBA-16. This means that in this combination, the organic functional group has two benzene molecules. It is considered that the presence of the steric acid reduced the selectivity due to steric hindrance.
- the present invention can be used in the field of analysis for selectively detecting a specific molecule.
- the present invention uses a benzene detecting element composed of mesoporous silica whose pores are unmodified or modified with a specific substituent.
- This detector has a structure of sub-nano-sized pores, pore size, modification state of the surface inside the pores (type and density of organic functional group having a specific substituent, etc.), and the inner surface of the pores and the benzene molecule. It controls the affinity of
- the detection element of the present invention it is possible to selectively detect benzene present in a trace amount in the atmosphere with high sensitivity.
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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EP04807290A EP1712889B1 (en) | 2004-02-06 | 2004-12-17 | Benzene pre-concentrator and method for manufacturing same |
US10/547,460 US7682564B2 (en) | 2004-02-06 | 2004-12-17 | Benzene detecting element and preparation process of same |
JP2005517626A JP4064992B2 (ja) | 2004-02-06 | 2004-12-17 | ベンゼン検出素子およびその製造方法 |
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US (1) | US7682564B2 (ja) |
EP (1) | EP1712889B1 (ja) |
JP (1) | JP4064992B2 (ja) |
CN (1) | CN100549658C (ja) |
WO (1) | WO2005075954A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2009150652A (ja) * | 2007-12-18 | 2009-07-09 | Nippon Telegr & Teleph Corp <Ntt> | ガス濃縮セルおよびガス濃縮方法 |
JP2017160475A (ja) * | 2016-03-08 | 2017-09-14 | Jxtgエネルギー株式会社 | 触媒層、膜電極接合体、電解セル及び触媒層の製造方法 |
JP2018004392A (ja) * | 2016-06-30 | 2018-01-11 | 日本電信電話株式会社 | 揮発性有機化合物の検出方法及び検出装置 |
Families Citing this family (5)
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EP1960487A1 (en) | 2005-12-08 | 2008-08-27 | Queen's University At Kingston | Optical sensor using functionalized composite materials |
CN100529754C (zh) * | 2006-11-10 | 2009-08-19 | 中国科学院山西煤炭化学研究所 | 一种分离苯及其同系物的方法 |
FR2933703B1 (fr) | 2008-07-11 | 2012-08-17 | Commissariat Energie Atomique | Detecteurs nanoporeux de composes aromatiques monocycliques et autres polluants |
WO2012011124A1 (en) * | 2010-07-20 | 2012-01-26 | Council Of Scientific & Industrial Research | Ordered mesoporous titanosilicate and the process for the preparation thereof |
EP2743681A1 (en) | 2012-12-13 | 2014-06-18 | Nederlandse Organisatie voor toegepast -natuurwetenschappelijk onderzoek TNO | Fluorescence detector system for detection of an aromatic hydrocarbon |
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JPH1062401A (ja) * | 1996-06-10 | 1998-03-06 | Toyota Central Res & Dev Lab Inc | 液体クロマトグラフ用充填剤 |
JP2000035810A (ja) * | 1998-07-16 | 2000-02-02 | Mitsubishi Electric Corp | ネットワークユニット |
JP2000088827A (ja) * | 1998-09-11 | 2000-03-31 | Hiroki Ri | 光学異性体分離用クロマトグラフィー用担体及びその製造法 |
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US5334368A (en) * | 1990-01-25 | 1994-08-02 | Mobil Oil Corp. | Synthesis of mesoporous oxide |
US5364797A (en) * | 1993-05-20 | 1994-11-15 | Mobil Oil Corp. | Sensor device containing mesoporous crystalline material |
US5849258A (en) * | 1996-06-06 | 1998-12-15 | Intevep, S.A. | Material with microporous crystalline walls defining a narrow size distribution of mesopores, and process for preparing same |
JP3583739B2 (ja) | 2000-08-22 | 2004-11-04 | 日本電信電話株式会社 | ガス分光分析用微小フローセルおよびその製造方法 |
EP1394113B1 (en) * | 2002-08-30 | 2009-04-29 | Tokuyama Corporation | Crystalline inorganic porous material |
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2004
- 2004-12-17 WO PCT/JP2004/018932 patent/WO2005075954A1/ja not_active Application Discontinuation
- 2004-12-17 JP JP2005517626A patent/JP4064992B2/ja active Active
- 2004-12-17 CN CNB2004800057042A patent/CN100549658C/zh active Active
- 2004-12-17 EP EP04807290A patent/EP1712889B1/en active Active
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Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH1062401A (ja) * | 1996-06-10 | 1998-03-06 | Toyota Central Res & Dev Lab Inc | 液体クロマトグラフ用充填剤 |
JP2000035810A (ja) * | 1998-07-16 | 2000-02-02 | Mitsubishi Electric Corp | ネットワークユニット |
JP2000088827A (ja) * | 1998-09-11 | 2000-03-31 | Hiroki Ri | 光学異性体分離用クロマトグラフィー用担体及びその製造法 |
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Cited By (3)
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JP2009150652A (ja) * | 2007-12-18 | 2009-07-09 | Nippon Telegr & Teleph Corp <Ntt> | ガス濃縮セルおよびガス濃縮方法 |
JP2017160475A (ja) * | 2016-03-08 | 2017-09-14 | Jxtgエネルギー株式会社 | 触媒層、膜電極接合体、電解セル及び触媒層の製造方法 |
JP2018004392A (ja) * | 2016-06-30 | 2018-01-11 | 日本電信電話株式会社 | 揮発性有機化合物の検出方法及び検出装置 |
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CN100549658C (zh) | 2009-10-14 |
US7682564B2 (en) | 2010-03-23 |
EP1712889B1 (en) | 2012-12-05 |
EP1712889A4 (en) | 2010-10-27 |
EP1712889A1 (en) | 2006-10-18 |
US20060258015A1 (en) | 2006-11-16 |
JP4064992B2 (ja) | 2008-03-19 |
CN1756946A (zh) | 2006-04-05 |
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