Preparation of photoelectric catalytic membrane for preparing hydrogen by decomposing water

A technology for photoelectric catalysis and water splitting, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, diaphragms, etc.

Active Publication Date: 2014-10-29
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006]The problem of the present invention is the shortcoming that single photocatalysis efficiency is low and single electrocatalysis energy consumption is big, and photogenerated electron hole separation efficiency is low in the bismuth oxyhalide photocatalysis process problem, the immobilization problem of photocatalyst, and provide a kind of photocatalytic film preparation method for splitting water to produce hydrogen

Method used

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  • Preparation of photoelectric catalytic membrane for preparing hydrogen by decomposing water
  • Preparation of photoelectric catalytic membrane for preparing hydrogen by decomposing water
  • Preparation of photoelectric catalytic membrane for preparing hydrogen by decomposing water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0031] The preparation method of a photoelectric catalytic film for decomposing water to produce hydrogen is as follows.

[0032] (1) Weigh 2.0 g of sodium cellulose acetate and 3.0 g of polyvinylpyrrolidone and mix them in a beaker, heat and stir to dissolve with distilled water, cast on a flat glass plate, dry in an oven at 20°C to form a film, and then use heavy metals Ion Ti 4+ Cross-link for 5 minutes, and then use the -PO 4 The solution is soaked for 5 minutes and dried at room temperature; a positive film with a thickness of 50 μm is obtained.

[0033] (2) Weigh 0.1 g of bismuth oxychloride catalyst uniformly dispersed in absolute ethanol under ultrasonic vibration, pour it on the surface of the positive film obtained in step (1) above, and air dry at 20°C to obtain a bismuth oxychloride film with a thickness of 0.05μm .

[0034] (3) Weigh 2.0 g of chitosan and 3.0 g of polyvinylpyrrolidone and mix them in a beaker, heat and stir to dissolve with 0.25% acetic acid aqueous...

Embodiment approach 2

[0038] The preparation method of a photoelectric catalytic film for decomposing water to produce hydrogen is as follows.

[0039] (1) Weigh 3.0 g sodium carboxymethyl cellulose and 4.0 g polyvinylpyrrolidone and mix them in a beaker, heat and stir to dissolve with distilled water, cast on a flat glass plate, dry in an oven at 25°C to form a film, and then Using heavy metal ion Ti 4+ Cross-link for 10 minutes, then use -PO 4 Soak the solution for 10 minutes and dry at room temperature to obtain a positive film with a thickness of 50 μm.

[0040] (2) Weigh 0.3 g of bismuth oxychloride catalyst uniformly dispersed in absolute ethanol under ultrasonic vibration, pour it on the surface of the positive film prepared in step (1) above, and air dry at 25°C to obtain a bismuth oxychloride film with a thickness of 0.05μm .

[0041] (3) Weigh 3.0 g of chitosan and 4.0 g of polyvinylpyrrolidone and mix them in a beaker, heat and stir to dissolve with 0.5% acetic acid aqueous solution, add g...

Embodiment approach 3

[0045] The preparation method of a photoelectric catalytic film for decomposing water to produce hydrogen is as follows.

[0046] (1) Weigh 5.0 g of sodium cellulose acetate and 6.0 g of polyvinylpyrrolidone, mix them in a beaker, heat and stir to dissolve with distilled water, cast on a flat glass plate, dry in an oven at 30°C to form a film, and then use heavy metals Ion Ti 4+ Cross-link for 15 minutes, then use -HSO 3 Soak the solution for 15 minutes and dry at room temperature to obtain a positive film with a thickness of 50 μm.

[0047] (2) Weigh 0.5 g of bismuth oxybromide catalyst uniformly dispersed in absolute ethanol under ultrasonic vibration, pour it on the surface of the positive film prepared in step (1) above, and air dry at 30°C to obtain a bismuth oxybromide film with a thickness of 0.05μm .

[0048] (3) Weigh 5.0 g of chitosan and 6.0 g of polyvinylpyrrolidone, mix them in a beaker, heat and stir to dissolve with 0.75% acetic acid aqueous solution, add succinal...

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Abstract

The invention relates to the preparation of a photoelectric catalytic membrane for preparing hydrogen by decomposing water. The preparation method comprises the steps of mixing sodium cellulose acetate or sodium carboxymethyl cellulose with polyvinylpyrrolidone; heating by distilled water, and stirring for dissolving; spreading the product on a flat glass plate, and drying to form a membrane; crosslinking by heavy metal ions; soaking in solution containing anion groups, and drying at the room temperature to obtain a thin membrane; evenly dispersing oxyhalide bismuth catalyst in absolute ethyl alcohol under ultrasonic oscillation, pouring the mixed solution onto the surface of the thin membrane, and drying by air; mixing chitosan and polyvinylpyrrolidone, and dispersing the mixture; heating by acetic acid water solution, and stirring for dissolving; feeding an aldehyde crosslinking agent for crosslinking, and then pouring the product onto the oxyhalide bismuth thin membrane to obtain the photoelectric catalytic membrane. The photoelectric catalytic membrane is used for preparing the hydrogen by decomposing water, and is capable of effectively separating photoproduction electron holes; the hydrogen production quantum efficiency reaches up to 90-96%, the hydrogen purity reaches up to 99-99.9%, and 15-40% of energy consumption can be saved, so that a new way is provided for preparing hydrogen by decomposing water through photoelectrocatalysis.

Description

technical field [0001] The invention relates to a method for decomposing water to produce a catalytic membrane for hydrogen production, in particular to a method for preparing a catalytic membrane for efficiently decomposing water to produce hydrogen under the synergistic action of simulated sunlight and an electric field. Background technique [0002] Solar energy is a new type of green energy. Its development and utilization is one of the focuses of current basic research on energy science and technology. It has practical significance for solving energy shortages and reducing environmental pollution pressure. Hydrogen energy is a clean, efficient, storable, transportable, and environmentally friendly renewable clean energy, known as "the oil of the future". [0003] Although the research in this field has made great progress in recent years after years of exploration and accumulation by scientists from various countries, in general, the efficiency of photocatalytic hydroge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/26C25B1/10C25B13/00
CPCY02E60/36
Inventor 梁镇海刘宪刘芝平杜海燕杨慧敏代红艳杨太来
Owner TAIYUAN UNIV OF TECH
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