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Method for conducting photocatalysis to decompose water and prepare hydrogen

A technology for photocatalysis and water splitting, applied in chemical instruments and methods, hydrogen production, hydrogen/synthesis gas production, etc., can solve problems that need to be strengthened, and achieve the effects of easy implementation, high efficiency, and easy popularization and application

Active Publication Date: 2018-03-06
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the current research on hydrogen production by photolysis of water still needs to be strengthened

Method used

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  • Method for conducting photocatalysis to decompose water and prepare hydrogen
  • Method for conducting photocatalysis to decompose water and prepare hydrogen
  • Method for conducting photocatalysis to decompose water and prepare hydrogen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1, photocatalytic decomposition of water to produce hydrogen

[0039] (1) Kinetic curve of hydrogen production by photocatalytic decomposition of water under xenon lamp light source

[0040] Water-soluble polythiophene derivatives (compounds shown in formula I), methyl viologen, ethylenediaminetetraacetic acid disodium salt, and colloidal platinum were sequentially added to a Pyrex glass bottle with a volume of 10 mL, and water was added to make up the volume to 3 mL, so that the water-soluble The final concentrations of polythiophene derivatives, methyl viologen, ethylenediaminetetraacetic acid disodium salt, and colloidal platinum were 20 μM, 5 mM, 50 mM, and 2 mM respectively; bubbled with argon for 30 min, placed in front of a xenon lamp for irradiation, and placed Light intensity at 50mW, take 200μL of upper gas every 1h, and detect the amount of hydrogen generated by gas chromatography.

[0041] Among them, the hydrogen production kinetic curve of the polym...

Embodiment 2

[0045] Example 2, photocatalytic hydrogen production control

[0046] (1) Photocatalytic hydrogen production

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Abstract

The invention discloses a method for conducting photocatalysis to decompose water and prepare hydrogen. The method comprises the following steps of 1, mixing a compound shown in the first formula I, methyl viologen, ethylenediaminetetraacetic acid disodium salt and colloidal platinum and adding water to dissolve the mixture, so that a solution is obtained; 2, conducting first bubbling treatment onthe solution to obtain a solution which is subjected to the first bubbling treatment; 3, conducting first photocatalytic decomposition treatment on the solution which is subjected to the first bubbling treatment, and collecting a gaseous product to obtain hydrogen, wherein the formulaIis shown in the description, and M+ represents metal ions. By means of the method for conducting photocatalysis to decompose water and prepare hydrogen, visible light can be effectively utilized to conduct photocatalysis to decompose water and prepare hydrogen; meanwhile, the method is low in cost, high in efficiency and controllability, easy to implement, and suitable for being widely popularized, and has very high application value and great practical application significance.

Description

technical field [0001] The invention relates to a method for preparing hydrogen by photocatalytically decomposing water. Background technique [0002] With the development of the economy, the problems of energy shortage and environmental pollution have gradually become the focus of people's attention. Not only are fossil fuels limited in storage, but their combustion also produces many harmful substances, such as sulfides and nitrogens that pollute the environment, and carbon dioxide can lead to the greenhouse effect and global warming. Hydrogen, as a clean energy, has attracted widespread attention. Hydrogen production by photolysis of water utilizes solar energy and water existing in nature to generate new energy that can replace fossil fuels, and has become a good way to solve energy and environmental problems with one stone. [0003] In recent years, scientists have tried to use inorganic semiconductors, doped inorganic semiconductors, quantum dots, and organic polymer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/04
CPCC01B3/042C01B2203/0277Y02E60/36
Inventor 王树卢欢吕凤婷刘礼兵
Owner INST OF CHEM CHINESE ACAD OF SCI
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