WO2015016276A1 - 光化学反応装置、その製造方法および光化学反応方法 - Google Patents
光化学反応装置、その製造方法および光化学反応方法 Download PDFInfo
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- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen; Reversible storage of hydrogen
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- B01J19/122—Incoherent waves
- B01J19/127—Sunlight; Visible light
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- B01J31/22—Organic complexes
- B01J31/2265—Carbenes or carbynes, i.e.(image)
- B01J31/2278—Complexes comprising two carbene ligands differing from each other, e.g. Grubbs second generation catalysts
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- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/39—Photocatalytic properties
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- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen; Reversible storage of hydrogen
- C01B3/02—Production of hydrogen; Production of gaseous mixtures containing hydrogen
- C01B3/04—Production of hydrogen; Production of gaseous mixtures containing hydrogen by decomposition of inorganic compounds
- C01B3/042—Decomposition of water
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- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/795—Porphyrin- or corrin-ring-containing peptides
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- B01J2219/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
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- B01J2219/1203—Incoherent waves
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- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
- B01J23/42—Platinum
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- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/64—Pore diameter
- B01J35/647—2-50 nm
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/64—Pore diameter
- B01J35/651—50-500 nm
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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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/0201—Impregnation
- B01J37/0203—Impregnation the impregnation liquid containing organic compounds
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- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
Definitions
- the present invention relates to a photochemical reaction device that promotes a chemical reaction using light energy such as sunlight, a method for manufacturing the photochemical reaction device, and a photochemical reaction method using the photochemical reaction device.
- FIGS. 5A and 5B show a photo-induced hydrogen generation reaction.
- the photosensitizer (P) when the photosensitizer (P) is photoexcited by light irradiation, electrons (e ⁇ ) are transferred to the electron transporter (C).
- the electrons (e ⁇ ) are transferred from the electron transporter (C) to the catalyst for reduction reaction (Catalyst), whereby hydrogen (H 2 ) is generated from the hydrogen ions (H + ).
- the electronic (e -) the lost photosensitizer (P), the electron from the electron donor (D) (e -) is granted.
- Patent Documents 1 and 2 by adopting an improved compound of methyl viologen as an electron transporter, the photochemical reaction can proceed in the atmosphere without removing oxygen from the reaction system. It is described that it becomes.
- This improved compound of methyl viologen is a compound having a structure capable of forming a micelle in an aqueous medium by giving an alkylene group to methyl viologen. Since this improved compound of methyl viologen forms micelles in an aqueous medium, the life of the reductant is longer than that of methyl viologen even in the presence of dissolved oxygen in the aqueous medium. For this reason, the progress of the photochemical reaction in the atmosphere becomes possible.
- Patent Document 1 describes that when methyl viologen is used, methyl viologen was not reduced under the atmosphere (see paragraph 0057 of Patent Document 1).
- the above-mentioned conventional technology enables the progress of photochemical reaction in the atmosphere by adopting an improved compound of methyl viologen as an electron transporter. By improving the reaction field, photochemistry in the atmosphere is improved. It does not allow the reaction to proceed.
- an object of the present invention is to provide a photochemical reaction apparatus and a photochemical reaction method using the photochemical reaction apparatus that can advance the photochemical reaction in the atmosphere by improving the reaction field.
- Another object of the present invention is to provide a method for producing the photochemical reaction device.
- the photochemical reaction device includes a porous glass (1) having a large number of pores (2) and transmitting light, and the inside of the pores (2). Further, at least a photosensitizer, an electron transporter, and a catalyst for a reduction reaction are arranged.
- the photochemical reaction device of the present invention uses the inside of the pores of the porous glass as a reaction field for the photochemical reaction. Since oxygen hardly penetrates into the pores of the porous glass, the oxygen present in the reaction field can be reduced even when the porous glass is placed in the atmosphere. For this reason, compared with the case where there is much oxygen in the reaction field, the number of electrons transferred from the electron transporter to oxygen can be reduced, and the number of electrons transferred from the electron transporter to the catalyst can be increased. Thereby, a photochemical reaction can be advanced under air
- the invention according to claim 2 is characterized in that, in the photochemical reaction device according to claim 1, the average pore diameter of the porous glass is 20 to 75 nm.
- the size of the pores is preferably such a size.
- the photochemical reaction device according to claim 3 is the photochemical reaction device according to claim 1 or 2, wherein the electron transporter is any one of methyl viologen, cytochrome, methylene blue, and titanium oxide. .
- a method for producing a photochemical reaction device comprising a solution containing a photosensitizer, an electron transporter and a catalyst, and a porous glass. And a step of immersing porous glass in a solution.
- a raw material is provided in the pores (2) of the porous glass (1) under the atmosphere. While supplying the solution containing a substance, the porous glass (1) is irradiated with light.
- FIG. 1 It is a conceptual diagram of the photochemical reaction device of the present invention. It is a figure which shows the manufacturing process of the porous glass in FIG. It is a figure which shows the photo-induced hydrogen generation reaction performed in air
- FIG. 1 shows a conceptual diagram of the photochemical reaction device of the present invention.
- the photochemical reaction device of the present invention includes a porous glass 1 having a large number of pores 2 and transmitting light.
- a reaction-related substance 3 related to a photochemical reaction is disposed inside the pores 2 of the porous glass 1.
- Reaction-related substance 3 is an electron donor, a photosensitizer, an electron transporter, and a catalyst for a reduction reaction.
- the Examples of the photochemical reaction include a production reaction of hydrogen as a product from a hydrogen ion as a raw material.
- the pore 2 of the porous glass 1 is continuous and penetrates the porous glass 1.
- the size of the pores 2 may be any size as long as the reaction-related substance 3 can be disposed. More specifically, the average pore diameter (average pore diameter) of the porous glass 1 is preferably 20 to 75 nm (20 nm to 75 nm). When the porous glass 1 having an average pore diameter within this numerical range is used, it has been confirmed by an experiment of the present inventor that a photochemical reaction has progressed in the atmosphere. Note that the variation in pore diameter is preferably small. For example, the pore size distribution in the region where the pore size is within ⁇ 10% of the average pore size is preferably 90% or more of the total pore size distribution. The average pore diameter and pore distribution are measured by mercury porosimetry.
- the shape of the porous glass 1 is preferably a plate shape.
- the thickness of the porous glass 1 should just be the thickness which the whole porous glass 1 permeate
- the light transmitted through the porous glass 1 is in the visible light region, but may be light in other regions as long as it is light in the region absorbed by the photosensitizer. In short, as the porous glass 1, one that transmits light absorbed by the photosensitizer is used.
- porous glass 1 a general glass created by utilizing the phase separation phenomenon of glass can be used.
- FIG. 2 the manufacturing process of the porous glass 1 using the phase separation phenomenon of glass is shown.
- a borosilicate glass having a composition comprising SiO 2 , B 2 O 3 and Na 2 O is heat-treated to cause spinodal phase separation, and further acid-treated to produce B 2 O 3 —Na 2.
- a porous glass 1 formed by dissolving the O phase can be used.
- the porous glass 1 is not limited to the one manufactured by the melting method, but may be one manufactured by the sol-gel method. However, those manufactured by the melting method have higher mechanical strength than those manufactured by the sol-gel method, have excellent moldability, and are suitable for device fabrication. It is preferable to use one.
- An electron donor has a function of transferring electrons to another substance and a reduction function, and is itself oxidized. That is, the electron donor means one having a function of transferring electrons to a photosensitizer that has lost electrons and a reduction function in the reaction system irradiated with light. Electron donors are sometimes referred to as reductive sacrificial reagents. In this reaction system, it refers to a substance that gives electrons to a photosensitizer that has passed electrons to an electron transporter.
- Examples of the electron donor include ethylenediaminetetraacetic acid (EDTA), sodium ascorbate, triethanolamine, mercaptoethanol, nicotinamide adenine dinucleotide, nicotinamide adenine dinucleotide phosphate, and the like.
- EDTA ethylenediaminetetraacetic acid
- sodium ascorbate sodium ascorbate
- triethanolamine triethanolamine
- mercaptoethanol mercaptoethanol
- nicotinamide adenine dinucleotide nicotinamide adenine dinucleotide phosphate, and the like.
- the photosensitizer plays a role in assisting the reaction and the luminescence process by passing the light energy obtained by absorption to other substances. That is, the photosensitizer absorbs light energy in the reaction system irradiated with light, converts it into electron energy with the energy, and has a function of passing electrons to the electron transporter (photoelectric conversion ability).
- a metal compound or an organic compound can be used, and examples thereof include a ruthenium metal complex, a porphyrin derivative, a phthalocyanine derivative, a chlorophyll derivative, and a protein-chlorophyll dye complex extracted from a photosynthetic organism.
- the surfactant n-dodecyl maltoside is required for uniform dispersion in aqueous solutions.
- the electron transporter has an electron transport function of receiving electrons and passing them to other substances. That is, the electron transporter has a reduction function of receiving electrons from the photosensitizer photoexcited by light irradiation and passing the electrons to the catalyst.
- the electron transporter is sometimes called an electron carrier or an electronic medium. Examples of the electron transporter include methyl viologen, quinone derivatives, indophenol, titanium oxide, methylene blue, Janus green B, and cytochrome.
- the catalyst for the reduction reaction is a substance that accelerates the reaction rate of a specific chemical reaction, and is a substance that does not change before and after the reaction.
- This catalyst receives electrons from an electron transporter in a reaction system irradiated with light, and reduces a raw material to generate a product.
- a metal catalyst such as platinum or an enzyme can be used as the catalyst.
- the enzyme include hydrogenase, alcohol dehydrogenase, formate dehydrogenase, malate dehydrogenase and the like.
- a catalyst is used according to the kind of photochemical reaction.
- hydrogenase or platinum is used in the hydrogen production reaction
- formate dehydrogenase is used in the formic acid production reaction
- alcohol dehydrogenase is used in the methanol production reaction
- malate dehydrogenase is used in the malic acid production reaction.
- reaction-related substances 3 are fixed to the surfaces of the pores 2 of the porous glass 1 by adsorption.
- the porous glass 1 in which these reaction-related substances 3 are fixed to the surfaces of the pores 2 is manufactured as follows.
- a step of preparing a solution containing the above-described electron donor, photosensitizer, electron transporter and catalyst, and porous glass 1 is performed.
- An aqueous solvent can be used as the solvent.
- the aqueous solvent may have a buffering action.
- a step of immersing the porous glass 1 in the solution is performed.
- the porous glass 1 by which the above-mentioned reaction related substance 3 was fixed to the surface of the pore 2 by adsorption is manufactured.
- a modification treatment may be performed on the surface of the pores 2 of the porous glass 1 before immersion. Accordingly, the reaction-related substance 3 may be fixed to the surface of the pore 2 by chemical bonding or the like.
- the porous glass 1 after immersion is used without drying.
- the immersed porous glass 1 is washed, and the washed porous glass 1 is used without being dried.
- the reason for not drying is to prevent the enzyme from being destroyed when the enzyme is used as a catalyst.
- cleaning may be used.
- the porous glass 1 When using the photochemical reaction device, the porous glass 1 is irradiated with light.
- a light source for irradiating the porous glass 1 with light the sun, a pseudo-sunlight generator or the like can be used.
- a solution containing a raw material is supplied into the pores 2 of the porous glass 1.
- the porous glass 1 is immersed in a solution containing a raw material, thereby supplying a solution containing the raw material into the pores 2.
- the solution containing the raw material is in a state of being stored in the reaction vessel.
- An aqueous solvent can be used as the solvent.
- the aqueous solvent may have a buffering action.
- the porous glass 1 is irradiated with light. Accordingly, the photochemical reaction can be advanced without performing an operation of removing oxygen from the reaction system, and the raw material can be reduced to generate a product.
- an electron donor in the solution containing the raw material before the porous glass 1 is immersed. Accordingly, electrons can be donated to the photosensitizer not only from the electron donor fixed in advance in the pores but also from the electron donor in the solution, and the production amount of the product due to the photochemical reaction can be increased.
- the photochemical reaction can be continued by adding an electron donor to the solution containing the raw material.
- FIGS. 3A and 3B show the photoinduced hydrogen generation reaction when the photochemical reaction device of the present invention is used. As shown in FIGS. 3A and 3B, by using the photochemical reaction device of the present invention, the photo-induced hydrogen generation reaction can proceed in the atmosphere. The reason for this is as follows.
- the photochemical reaction device having the above-described configuration uses the porous glass 1 that can transmit light in the region absorbed by the photosensitizer, and disposes the reaction-related substance 3 inside the pore 2, whereby the porous glass 1
- the inside of the pore 2 is used as a reaction field for photochemical reaction. Since the oxygen in the solution hardly penetrates into the pores 2 of the porous glass 1, the oxygen present in the reaction field can be reduced even when the porous glass 1 is placed in the atmosphere.
- the photochemical reaction device of the present invention compared with the case where there is a lot of oxygen in the reaction field, the number of electrons transferred from the electron transporter to oxygen is reduced, and as shown in FIG. moving electrons to) (e -) can be increased.
- the photo-induced hydrogen generation reaction can be advanced in the atmosphere. The same applies to other photochemical reactions.
- the photochemical reaction device having the above-described configuration is manufactured by immersing the porous glass 1 in a solution containing the reaction-related substance 3.
- the porous glass 1 is immersed in a solution containing the reaction-related substance 3 and the reaction-related substance 3 is adsorbed on the surfaces of the pores 2, the reaction-related substance 3 exists more densely than in the solution. For this reason, according to the photochemical reaction device having the above-described configuration, a high-concentration reaction field can be constructed.
- the electron donor, the photosensitizer, the electron transporter, and the catalyst are arranged in the pores 2 of the porous glass 1 in advance. You may arrange
- FIG. For example, when the photochemical reaction is performed, an electron donor may be supplied into the pores 2 together with the raw material. In short, the electron donor only needs to be disposed when the photochemical reaction is performed, and is not limited to the case where the electron donor is disposed in advance in the pores 2 together with other photochemical reaction-related substances. It may be supplied to the inside of the pore 2 together with the substance.
- an electron donor is arranged in advance in the pores 2 of the porous glass 1 and that the electron donor is also included in the solution containing the raw material when performing the photochemical reaction. In this case, the start of the photochemical reaction can be accelerated.
- the porous glass 1 when the photochemical reaction is performed using the photochemical reaction device, the porous glass 1 is immersed in the solution containing the raw material substance stored in the reaction vessel, but the solution flowing in the flow path Alternatively, the porous glass 1 may be immersed, and the solution containing the raw material may be continuously supplied into the pores 2.
- a solution containing the reaction-related substance 3 and a solution containing the raw material are separately prepared, and the porous glass 1 is immersed in the solution containing the reaction-related substance 3 to thereby react the reaction-related substance 3.
- the porous glass 1 may be immersed in a solution containing both the reaction-related substance 3 and the raw material. That is, the reaction-related substance 3 and the raw material may be simultaneously supplied into the pores 2 of the porous glass 1.
- the reaction-related substance 3 is fixed to the surface of the pore 2 of the porous glass 1, but the reaction-related substance 3 is not fixed to the surface of the pore 2 of the porous glass 1, Further, it may be in a state of being disposed inside the pore 2.
- the electron transporter has a reduction function of receiving electrons from the photosensitizer and passing the electrons to the catalyst, but the electron transporter receives electrons from the electron donor, It may have a function of passing electrons to the photosensitizer.
- the photosensitizer has a function of passing electrons to the catalyst. Examples of the electron transporter having such a function include cytochrome (see Example 3).
- Examples of the present invention will be described below.
- the porous glass used was manufactured by the melting method, has a plate shape of 1 mm in thickness, and has an average pore diameter of 50 nm.
- the porous glass used was manufactured by the sol-gel method, has a particle shape of 3 to 5 mm in diameter, and has an average pore diameter of 50 nm.
- the porous glass used in Examples 1 to 3 and the porous glass used in Examples 4 to 6 had a pore size distribution in the region of 45 to 55 nm in pore size distribution of 90% or more of the total pore size distribution. there were.
- Shimadzu Corporation automatic porosimeter Autopore IV 9500 was used for the measurement of the pore diameter of porous glass.
- Example 1 100 containing 20 mM ethylenediaminetetraacetic acid (EDTA) as an electron donor, 0.5 mM ruthenium metal complex Ru (bpy) 3 as a photosensitizer, 3.0 mM methylviologen as an electron transporter, 5.5 uM hydrogenase as a catalyst
- EDTA ethylenediaminetetraacetic acid
- bpy ruthenium metal complex Ru
- the porous glass is taken out of the soaked solution, and the porous glass surface is washed by immersing it once in 100 ⁇ mM Tris buffer solution (pH 7.4) 1.33 mL containing 20 mM ethylenediaminetetraacetic acid (EDTA). It was.
- Example 2 Protein-chlorophyll dye complex extracted from photosynthetic organisms as a photosensitizer (light-collecting protein 24 uM), 3.0 mM methylviologen as an electron transporter, 1.4 uM hydrogenase as a catalyst, 0.03% (w / v )
- the reaction-related substance 3 is adsorbed on the pore 2 surface of the porous glass 1 by immersing 10 mg of porous glass in 133 uL of 100 mM Tris buffer solution (pH 7.4) containing n-dodecyl maltoside for 12 hours or more. (See FIG. 1).
- the porous glass was taken out of the soaked solution, and the glass surface was washed by immersing it once in 1.33 mL of 100 mM Tris buffer solution (pH 7.4) containing 20 mM mM nicotinamide adenine dinucleotide.
- Example 3 Protein-chlorophyll dye complex (photosystem I protein-dye complex) extracted from photosynthetic organisms as photosensitizers, cytochrome c6 as electron transporter, platinum colloid as catalyst, sodium ascorbate as electron donor The photohydrogen generation system using is shown.
- cytochrome c6 electron transporter
- platinum colloid platinum colloid as catalyst
- sodium ascorbate electron donor
- photohydrogen generation system using is shown.
- cytochrome c6 electron transporter
- reaction-related substance 3 was adsorbed on the surface of the pores 2 of the porous glass 1 by immersing 18.3 mg of the porous glass in 244 mL (pH 7.8) for 12 hours or more (see FIG. 1).
- porous glass was taken out from the soaked solution, and the glass surface was washed by applying it once to 2.44 mL of 40 mM mM female buffer solution (pH 6.2) containing 100 mM sodium ascorbate.
- the reaction-related substance 3 was adsorbed in a glass container containing 100 mM sodium ascorbate as an electron donor and 2.44 mL of 40 mM female buffer (pH 6.0) containing 4 mM cytochrome c6 as an electron transporter. Glassy glass 1 was put, and it was covered with a rubber stopper to make a reaction vessel. The photochemical reaction was advanced by irradiating the porous glass 1 with light using a pseudo-sunlight generator. Gas was collected from the glass container using a syringe, and hydrogen gas generated by gas chromatography was detected and quantified. After 6.5 hours of light irradiation, 4.5 nmol of hydrogen gas was detected.
- Example 4 The reaction-related substance 3 in Example 1 was adsorbed on the pore surface of the particulate porous glass under the same conditions as in Example 1 on the particulate porous glass produced by the sol-gel method.
- the particulate porous glass is taken out from the soaked solution, and immersed once in 100 ⁇ mM Tris buffer solution (pH 7.4) 1.33 mL containing 20 mM ethylenediaminetetraacetic acid (EDTA). Was washed.
- 100 ⁇ mM Tris buffer solution pH 7.4
- EDTA ethylenediaminetetraacetic acid
- Example 5 20 mM ethylenediaminetetraacetic acid (EDTA) as an electron donor, 0.5 mM ruthenium metal complex Ru (bpy) 3 as a photosensitizer, 3.0 mM methylene blue as an electron transporter, 100 mM containing 5.5 uM hydrogenase as a catalyst Reaction-related substance 3 is adsorbed on the surface of pores 2 of porous glass 1 by immersing 10 mg of particulate porous glass produced by sol-gel method in Tris buffer (pH 8.0) 1.33 uL for 12 hours or more. (See FIG. 1).
- Tris buffer pH 8.0
- the porous glass is taken out of the soaked solution, and the porous glass surface is washed by immersing it once in 100 ⁇ mM Tris buffer solution (pH 7.4) 1.33 mL containing 20 mM ethylenediaminetetraacetic acid (EDTA). It was.
- Example 6 By immersing 4.9 mg of porous glass in 133 uL of an aqueous solution of 1.0 mg / mL titanium oxide (particle diameter: about 40 nm) for 12 hours or more, titanium oxide as an electron transporter was adsorbed.
- the porous glass is taken out of the soaked solution, and the porous glass surface is washed by immersing it once in 100 ⁇ mM Tris buffer solution (pH 7.4) 1.33 mL containing 20 mM ethylenediaminetetraacetic acid (EDTA). It was.
- porous glass 1 adsorbing reaction-related substance 3 put porous glass 1 adsorbing reaction-related substance 3 in a glass container containing 100 ⁇ mM Tris buffer (pH 7.4) 1.33 mL containing fresh 20 mM ethylenediaminetetraacetic acid (EDTA)
- the reaction vessel was covered with a lid.
- the photochemical reaction was advanced by irradiating the porous glass 1 with light using a pseudo-sunlight generator. Gas was collected from the glass container using a syringe, and hydrogen gas generated by gas chromatography was detected and quantified. As a result, 6 nmol of hydrogen gas was detected after 4 hours of light irradiation.
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Abstract
Description
(実施例1)
電子供与体としての20 mM エチレンジアミン4酢酸(EDTA)、光増感剤としての0.5 mM ルテニウム金属錯体Ru(bpy)3、電子輸送体としての3.0 mM メチルビオロゲン、触媒としての5.5 uMヒドロゲナーゼを含む100 mMトリス緩衝液(pH 8.0) 133 uLに、多孔質ガラス 10 mgを12時間以上浸漬することで、反応関連物質3を多孔質ガラス1の細孔2表面に吸着させた(図1参照)。
(比較例1)
実施例1における反応関連物質3の多孔質ガラス1への吸着時に使用した溶液と同じ溶液150 uLをゴム栓で蓋が可能なガラス容器に入れ、疑似太陽光発生装置を照射することで、光化学反応を試みた。シリンジを用いてガラス容器から気体を採取し、ガスクロマトグラフィーで発生した水素ガスを検出、定量した。その結果を図4に示す。図4の結果より、水素ガスは検出されず、光化学反応は進行していないことが確認された。
(実施例2)
光増感剤としての光合成生物から抽出したタンパク質-クロロフィル色素複合体(光捕集系タンパク質 24 uM)、電子輸送体としての3.0 mM メチルビオロゲン、触媒としての1.4 uMヒドロゲナーゼ、0.03%(w/v) n-ドデシルマルトシドを含む100 mM トリス緩衝液(pH 7.4) 133 uLに、多孔質ガラス 10 mgを12時間以上浸すことで、反応関連物質3を多孔質ガラス1の細孔2表面に吸着させた(図1参照)。
(実施例3)
光増感剤としての光合成生物から抽出したタンパク質-クロロフィル色素複合体(光化学系Iタンパク質-色素複合体)、電子輸送体としてのシトクロムc6、触媒としての白金コロイド、電子供与体としてのアスコルビン酸ナトリウムを用いての光水素発生系を示す。本実施例において、シトクロムc6(電子輸送体)は、アスコルビン酸ナトリウム(電子供与体)から、電子を受け取り、タンパク質-クロロフィル色素複合体(光増感剤)へ渡す機能を有する。
(実施例4)
実施例1における反応関連物質3をゾルゲル法で製造された粒子状の多孔質ガラスへ実施例1と同様の条件で粒子状多孔質ガラスの細孔表面に吸着させた。
(実施例5)
電子供与体としての20 mM エチレンジアミン4酢酸(EDTA)、光増感剤としての0.5 mM ルテニウム金属錯体Ru(bpy)3、電子輸送体としての3.0 mM メチレンブルー、触媒としての5.5 uMヒドロゲナーゼを含む100 mMトリス緩衝液(pH 8.0) 1.33 uLに、ゾルゲル法で製造された粒子状の多孔質ガラス 10 mgを12時間以上浸漬することで、反応関連物質3を多孔質ガラス1の細孔2表面に吸着させた(図1参照)。
(実施例6)
1.0 mg/mL 酸化チタン(粒子径約40 nm)水溶液 133 uLに多孔質ガラス 4.9 mgを12時間以上浸漬することで、電子輸送体としての酸化チタンを吸着させた。1.33 mLの蒸留水で多孔質ガラスを洗浄した後に、電子供与体としての20 mM エチレンジアミン4酢酸(EDTA)、光増感剤としての0.5 mM ルテニウム金属錯体Ru(bpy)3、触媒としての5.5 uMヒドロゲナーゼを含む100 mMトリス緩衝液(pH 8.0) 133 uLに、多孔質ガラスを12時間以上浸漬することで、反応関連物質3すべてを多孔質ガラス1の細孔2表面に吸着させた(図1参照)。
2 細孔
3 反応関連物質
Claims (5)
- 多数の細孔(2)を有し、かつ、光を透過する多孔質ガラス(1)を備え、
前記細孔(2)内部に、少なくとも光増感剤、電子輸送体および還元反応用の触媒が配置されていることを特徴とする光化学反応装置。 - 前記多孔質ガラスの平均細孔径は、20~75nmであることを特徴とする請求項1に記載の光化学反応装置。
- 前記電子輸送体は、メチルビオロゲン、シトクロム、メチレンブルー、酸化チタンのいずれか1つであることを特徴とする請求項1または2に記載の光化学反応装置。
- 前記光増感剤、前記電子輸送体および前記触媒を含む溶液と、前記多孔質ガラスとを用意する工程と、
前記溶液に前記多孔質ガラスを浸漬する工程とを行うことを特徴とする請求項1ないし3のいずれか1つに記載の光化学反応装置の製造方法。 - 請求項1ないし3のいずれか1つに記載の前記光化学反応装置を用い、
大気下で、前記多孔質ガラス(1)の細孔(2)内部に、原料物質を含む溶液を供給するとともに、前記多孔質ガラス(1)に前記光を照射することを特徴とする光化学反応方法。
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| JP2015529601A JP6452159B2 (ja) | 2013-08-02 | 2014-07-30 | 光化学反応装置、その製造方法および光化学反応方法 |
| US14/909,601 US20160251216A1 (en) | 2013-08-02 | 2014-07-30 | Photochemical reaction device, method for manufacturing same, and photochemical reaction method |
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| JP2013161622 | 2013-08-02 | ||
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5711801A (en) * | 1980-05-28 | 1982-01-21 | Univ California | Photolytic method for water |
| JPH11169725A (ja) * | 1997-12-10 | 1999-06-29 | Soken:Kk | 光増感剤が付着された酸化チタン光触媒 |
| JP2000129018A (ja) * | 1998-10-26 | 2000-05-09 | Dainippon Printing Co Ltd | 光触媒機能を有する合成樹脂成形品の製造方法 |
| JP2000317315A (ja) * | 1999-05-11 | 2000-11-21 | Agency Of Ind Science & Technol | 光触媒を分散含有した光透過性多孔質膜 |
| JP2003103178A (ja) * | 2001-09-28 | 2003-04-08 | Toyota Central Res & Dev Lab Inc | マグネシウムポルフィリン複合体及びその製造方法 |
| JP2008095050A (ja) * | 2006-10-16 | 2008-04-24 | Hidetoshi Tsuchida | アルブミン−金属ポルフィリン複合体および光増感剤 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ZA825890B (en) * | 1981-08-21 | 1983-06-29 | Commw Scient Ind Res Org | Modified catalysts for the solar reduction of water |
-
2014
- 2014-07-30 JP JP2015529601A patent/JP6452159B2/ja not_active Expired - Fee Related
- 2014-07-30 US US14/909,601 patent/US20160251216A1/en not_active Abandoned
- 2014-07-30 WO PCT/JP2014/070102 patent/WO2015016276A1/ja not_active Ceased
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5711801A (en) * | 1980-05-28 | 1982-01-21 | Univ California | Photolytic method for water |
| JPH11169725A (ja) * | 1997-12-10 | 1999-06-29 | Soken:Kk | 光増感剤が付着された酸化チタン光触媒 |
| JP2000129018A (ja) * | 1998-10-26 | 2000-05-09 | Dainippon Printing Co Ltd | 光触媒機能を有する合成樹脂成形品の製造方法 |
| JP2000317315A (ja) * | 1999-05-11 | 2000-11-21 | Agency Of Ind Science & Technol | 光触媒を分散含有した光透過性多孔質膜 |
| JP2003103178A (ja) * | 2001-09-28 | 2003-04-08 | Toyota Central Res & Dev Lab Inc | マグネシウムポルフィリン複合体及びその製造方法 |
| JP2008095050A (ja) * | 2006-10-16 | 2008-04-24 | Hidetoshi Tsuchida | アルブミン−金属ポルフィリン複合体および光増感剤 |
Non-Patent Citations (2)
| Title |
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| ANATOLY A. TSYGANKOV ET AL.: "Photobioreactor with Photosynthetic Bacteria Immobilized on Porous Glass for Hydrogen Photoproduction", JOURNAL OF FERMENTATION AND BIOENGINEEARING, vol. 77, no. 5, 1994, pages 575 - 578 * |
| ANNY SLAMA-SCHWOK ET AL.: "Photoinduced charge separation across the solid-liquid interface of porous sol-gel glasses: catalyzed hydrogen generation from water", THE JOURNAL OF PHYSICAL CHEMISTRY, vol. 93, no. 22, 1989, pages 7544 - 7547 * |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2015016276A1 (ja) | 2017-03-02 |
| US20160251216A1 (en) | 2016-09-01 |
| JP6452159B2 (ja) | 2019-01-16 |
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