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Indium zinc sulfide/bismuth vanadate composite material, and preparation method and application thereof

A composite material, indium zinc sulfide technology, applied in chemical instruments and methods, chemical/physical processes, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of redox potential limitation, high recombination probability, etc. Achieve the effect of promoting rapid migration, increasing specific surface area, and easy availability of raw materials

Active Publication Date: 2020-05-29
SUZHOU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the photocatalytic activity of a single semiconductor photocatalyst is greatly limited due to its high recombination probability of photogenerated carriers and limited redox potential.

Method used

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  • Indium zinc sulfide/bismuth vanadate composite material, and preparation method and application thereof
  • Indium zinc sulfide/bismuth vanadate composite material, and preparation method and application thereof
  • Indium zinc sulfide/bismuth vanadate composite material, and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0028] 1. Preparation of decahedral bismuth vanadate

[0029] Disperse 3 grams of bismuth nitrate pentahydrate and 1 gram of ammonium vanadate into 50 milliliters of 3mol / L dilute nitric acid, adjust the pH to 3 by adding ammonia water dropwise until a precipitate is formed, and transfer the precipitate to a reactor for aging for 3 hours Afterwards, hydrothermal reaction was carried out at 250° C. for 20 hours. After the reaction, the product was washed four times with water and ethanol respectively, and dried in a vacuum oven for 8 hours to obtain decahedral bismuth vanadate. attached figure 1 And attached figure 2 They are the SEM image and TEM image of decahedral bismuth vanadate, respectively. It can be seen from the pictures that the bismuth vanadate presents a decahedral structure.

[0030] 2. Preparation of indium zinc sulfide / bismuth vanadate composites

[0031] Inject 30 milliliters of water and 3 milliliters of glycerin into a 50 milliliter round bottom flask, ad...

Embodiment 2

[0034] Disperse 20 mg of photocatalyst into 100 ml of mixed solution (the volume of water and triethanolamine is 9:1), and then add 3wt% H 2 PtCl 6 ·6H 2 O is used as a cocatalyst, and the mixed solution is ultrasonically dispersed to make it uniformly dispersed, and then degassed to discharge the air left in the photocatalytic system. Turn on a 300-watt xenon lamp to start the photolysis water experiment, take a sample every one hour, and use a gas chromatograph containing a thermal conductivity detector to detect the amount of hydrogen generated, wherein nitrogen is the carrier gas, using Molecular sieve columns.

[0035] attached Figure 5 The effect diagram of the photocatalytic decomposition of water to produce hydrogen by the indium zinc sulfide / bismuth vanadate composite material, attached Figure 6 The photocatalytic material recycling effect diagram. It can be seen from the figure that the photocatalytic performance of the indium zinc sulfide / bismuth vanadate co...

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Abstract

The invention discloses a preparation method of an indium zinc sulfide / bismuth vanadate composite material. The preparation method comprises the following steps: (1) mixing zinc chloride, indium chloride tetrahydrate and thioacetamide with water and glycerol, and stirring until the obtained mixture is uniformly dispersed; and (2) adding decahedral bismuth vanadate into the obtained mixed solution,stirring, and preparing the indium zinc sulfide / bismuth vanadate composite material by using a low-temperature solvothermal technology. The invention also discloses the indium zinc sulfide / bismuth vanadate composite material prepared by the method, and an application of the indium zinc sulfide / bismuth vanadate composite material as a photocatalyst in the field of new energy. The indium zinc sulfide / bismuth vanadate composite material has a very good catalytic effect on hydrogen production by photolysis of water, and can be repeatedly utilized for multiple times; and the composite material hasthe advantages of simple preparation process, easiness in recycling and the like, and has a wide application prospect in the field of new energy.

Description

technical field [0001] The invention relates to the technical field of functional materials, in particular to a composite material based on indium zinc sulfide / bismuth vanadate, its preparation method and its application in photolysis of water to produce hydrogen. Background technique [0002] At present, the world is in a period of high energy consumption. The limited fossil fuels will be completely exhausted in the near future, and according to experts' prediction, China's oil reserves will be exhausted in less than 50 years. Therefore, energy The crisis is a huge problem facing our country and the world at present. However, solar energy is inexhaustible, how to effectively convert solar energy into useful chemical energy is the focus of scientists' research. With the continuous development of science, people have discovered that water can be decomposed into hydrogen through semiconductor materials under the action of sunlight, which provides an effective way for the deve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04B01J23/22C01B3/04
CPCB01J27/04B01J23/22B01J23/002C01B3/042B01J35/39Y02P20/133
Inventor 胡俊蝶陈操李长明
Owner SUZHOU UNIV OF SCI & TECH
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