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A visible-light-responsive cubic sphalerite-structured cd x zn 1‑x Preparation method of s solid solution photocatalyst

A cubic sphalerite and photocatalyst technology, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, and hydrogen production, can solve the problems of low hydrogen production rate and high cost, and achieve simple preparation process, low cost, The effect of high utilization rate of visible light

Active Publication Date: 2017-10-03
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the invention is to solve the existing Cd x Zn 1-x S photocatalyst decomposes H under visible light 2 O problems of low hydrogen production rate and high cost, while providing a visible-light-responsive cubic sphalerite-structured Cd x Zn 1-x Preparation method of S solid solution photocatalyst

Method used

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  • A visible-light-responsive cubic sphalerite-structured cd <sub>x</sub> zn <sub>1‑x</sub> Preparation method of s solid solution photocatalyst
  • A visible-light-responsive cubic sphalerite-structured cd <sub>x</sub> zn <sub>1‑x</sub> Preparation method of s solid solution photocatalyst
  • A visible-light-responsive cubic sphalerite-structured cd <sub>x</sub> zn <sub>1‑x</sub> Preparation method of s solid solution photocatalyst

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specific Embodiment approach 1

[0043] Specific implementation mode 1: This implementation mode is a Cd with cubic sphalerite structure responding to visible light x Zn 1-x The preparation method of S solid solution photocatalyst is finished according to the following steps:

[0044] One, the Zn (Ac) 2 2H 2 O and Cd(Ac) 2 2H 2 O was added to distilled water, and then stirred at a stirring speed of 1r / min to 5r / min for 20min to 90min to obtain a mixed solution of zinc acetate and cadmium acetate;

[0045] Zn(Ac) described in step one 2 2H 2 O and Cd(Ac) 2 2H 2 The substance ratio of O is (1.5~9):1;

[0046] Zn(Ac) described in step one 2 2H 2 O and Cd(Ac) 2 2H 2 The volume ratio of the total substance amount of O to distilled water is 6mmol:(20mL~30mL);

[0047] 2. Add thiourea to distilled water, and then stir at a stirring speed of 1r / min to 5r / min for 30min to 120min to obtain a thiourea solution;

[0048] The volume ratio of the amount of substance of thiourea described in step 2 to distill...

specific Embodiment approach 2

[0068] Specific embodiment two: the difference between this embodiment and specific embodiment one is: Zn(Ac) described in step one 2 2H 2 O and Cd(Ac) 2 2H 2 The substance molar ratio of O is (1.5-5):1. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0069] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: Zn(Ac) described in step one 2 2H 2 O and Cd(Ac) 2 2H 2 The volume ratio of the total substance amount of O to distilled water is 6mmol:(20mL~25mL). Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention provides a method for preparing a CdxZn1-xS solid solution photocatalyst provided with a cubic sphalerite structure and corresponding to visible light and relates to a method for preparing a photocatalyst. The method aims to solve the problems that the hydrogen production speed is low and the cost is high when an existing CdxZn1-xS photocatalyst decomposes H2O in the presence of visible light. The preparing method comprises the first step of preparing a mixed solution of zinc acetate and cadmium acetate; the second step of preparing a thiourea solution; the third step of preparing reaction liquid; the fourth step of blowing the reaction liquid through nitrogen to perform deoxygenation for 5 min and then sealing a reaction kettle, reacting for 6-24 h at the temperature of 140-200 DEG C, and performing washing and drying to obtain the CdxZn1-xS solid solution photocatalyst provided with the cubic sphalerite structure and corresponding to the visible light. According to the method, the CdxZn1-xS solid solution photocatalyst provided with the cubic sphalerite structure and corresponding to the visible light can be obtained.

Description

technical field [0001] The invention relates to a preparation method of a photocatalyst. Background technique [0002] The global crisis and environmental pollution caused by the excessive combustion of fossil fuels are two basic problems faced by human beings today. Hydrogen has attracted more and more attention as a clean energy source. Since the discovery of TiO by Japanese scientist Fujishima in 1972 2 The photocatalytic decomposition of semiconductor surfaces to generate hydrogen and oxygen has attracted widespread attention since the use of semiconductor photocatalysts for photocatalytic hydrogen production from water. The effective conversion of solar energy plays an important role in the establishment of an environmentally friendly society. Metal sulfides have attracted many researchers due to their suitable energy band gap and photocatalytic properties. However, most semiconductors have a large bandgap and only respond to ultraviolet light, which accounts for 4% o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/04C01B3/04B82Y30/00B82Y40/00
CPCY02E60/36
Inventor 姚忠平贺雅琼夏琦兴姜兆华
Owner HARBIN INST OF TECH
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