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Composite material for preparing hydrogen energy source by decomposition water under visible light and its preparation method

A technology for composite materials and water splitting, which is applied in the field of composite materials and its preparation, can solve problems such as poor stability, narrow photoresponse range, and low hydrogen production rate, and achieve wide response range, good repeatability, and high photocatalytic activity. Effect

Inactive Publication Date: 2018-01-12
王丽燕
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, in general, the existing photo-water splitting materials generally have technical problems such as poor stability, low hydrogen production rate, and too narrow photoresponse range. It is very important to develop a photo-water splitting hydrogen production material with industrial application prospects. the meaning of

Method used

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  • Composite material for preparing hydrogen energy source by decomposition water under visible light and its preparation method

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Embodiment 1

[0026] A method for preparing a composite material for decomposing water under visible light to prepare hydrogen energy, comprising the following steps:

[0027] (1) 0.23g Zn(Ac) 2 2H 2 O, 0.3gIn(NO 3 ) 3 1. Add 0.6g of cerium nitrate to 100ml of ethanol solution, stir for 45min at a temperature of 70°C, then add 0.03g of thioacetamide, and continue stirring for 2h before use;

[0028] (2) Under constant stirring, add 50ml of 2mg / mL graphene oxide solution to the solution in step (1), and after stirring for 60min, transfer the resulting mixture to the reactor, react at a temperature of 160°C for 18h, and stop the reaction Afterwards, the reactor was cooled to room temperature, washed with water until neutral to obtain product A;

[0029] (3) Add 0.3g In(NO 3 ) 3 , 0.23g Cd(Ac) 2 2H 2 O. Add 0.6 g of cerium nitrate to 100 ml of ethanol solution, stir for 40 min at a temperature of 80° C., then add 0.03 g of thioacetamide, and continue stirring for 2 h for later use;

...

Embodiment 2

[0033] A method for preparing a composite material for decomposing water under visible light to prepare hydrogen energy, comprising the following steps:

[0034] (1) 0.23g Zn(Ac) 2 2H 2 O, 0.32gIn(NO 3 ) 3 1. Add 0.65g of cerium nitrate to 100ml of ethanol solution, stir for 45min at a temperature of 70°C, then add 0.05g of thioacetamide, and continue stirring for 2h before use;

[0035](2) Under constant stirring, add 60ml of 2mg / mL graphene oxide solution to the solution in step (1), and after stirring for 60min, transfer the resulting mixture to a reaction kettle, react at a temperature of 180°C for 15h, and stop the reaction Afterwards, the reactor was cooled to room temperature, washed with water until neutral to obtain product A;

[0036] (3) 0.32g In(NO 3 ) 3 , 0.23g Cd(Ac) 2 2H 2 O. Add 0.65 g of cerium nitrate to 100 ml of ethanol solution, stir for 40 min at a temperature of 80° C., then add 0.05 g of thioacetamide, and continue stirring for 2 h for later use...

Embodiment 3

[0040] A method for preparing a composite material for decomposing water under visible light to prepare hydrogen energy, comprising the following steps:

[0041] (1) 0.3g Zn(Ac) 2 2H 2 O, 0.4gIn(NO 3 ) 3 1. Add 0.7g of cerium nitrate to 100ml of ethanol solution, stir for 45min at a temperature of 70°C, then add 0.06g of thioacetamide, and continue stirring for 2h before use;

[0042] (2) Under constant stirring, add 80ml of 2mg / mL graphene oxide solution to the solution in step (1), and after stirring for 60min, transfer the resulting mixture to the reactor, react at a temperature of 160°C for 18h, and stop the reaction Afterwards, the reactor was cooled to room temperature, washed with water until neutral to obtain product A;

[0043] (3) Add 0.4g In(NO 3 ) 3 , 0.3g Cd(Ac) 2 2H 2 O. Add 0.7 g of cerium nitrate to 100 ml of ethanol solution, stir for 40 min at a temperature of 80° C., then add 0.06 g of thioacetamide, and continue stirring for 2 h for later use;

[0...

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Abstract

The invention provides a preparation method of a composite material for preparing hydrogen energy source by decomposition water under visible light. Through an one-step hydrothermal method, graphene is compounded with zinc indium sulfide mixed with rare-earth and zinc cadmium sulfide mixed with rare-earth; on the one hand, graphene structures a heterogeneous structure on the surface of a catalystsurface so as to improve the photocatalytic activity of a photocatalytic material; on the other hand, the graphene can be used as a transition body of electronic migration in the composite catalyst material under the irradiation of the visible light, thus separation between an electron and a hole is effectively reached, and the compounding of a photon-generated carrier is stopped; thus hydrogen production can be stabilized under the effect of the visible light; moreover, the composite material of the zinc indium sulfide mixed with rare-earth and graphene and the composite material of the zinccadmium sulfide mixed with rare-earth and the graphene are further compounded; the photocatalysis hydrogen production activity of the material is further promoted, and the requirement of the photocatalytic water splitting hydrogen production material responded to the visible light in the photocatalysis field can be satisfied.

Description

technical field [0001] The invention relates to the fields of new energy technology and new material technology, in particular to a composite material used for decomposing water under visible light to prepare hydrogen energy and a preparation method thereof. Background technique [0002] With the rapid development of the economy, energy shortage and environmental problems have been paid more and more attention by people. As a clean, efficient, green and non-polluting energy, hydrogen energy is considered to be one of the most effective ways to solve energy and environmental problems. In the method of preparing hydrogen, it is an effective hydrogen production method to convert solar energy into hydrogen energy by using a solar light source and using semiconductor photocatalytic decomposition of water to produce hydrogen. [0003] As early as 1972, Honda et al. used TiO 2 Using Pt as an electrode, by applying an offset potential, the photocatalytic decomposition of water to ...

Claims

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Application Information

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IPC IPC(8): B01J27/25C01B3/04
CPCY02E60/36
Inventor 王丽燕
Owner 王丽燕
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