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MoSe 2-CdS/CdSe composite photocatalyst and preparation method thereof

A mose2-cds, composite light technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of fast photo-generated electron-hole recombination rate, easy photocorrosion, etc., and achieve cheap raw materials. , excellent performance, high photocatalytic activity

Active Publication Date: 2019-05-24
GUANGZHOU UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, cadmium sulfide still has certain disadvantages when used in photocatalytic hydrogen production reactions, such as its easy photocorrosion, too fast recombination rate of photogenerated electrons and holes, etc.

Method used

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  • MoSe 2-CdS/CdSe composite photocatalyst and preparation method thereof
  • MoSe 2-CdS/CdSe composite photocatalyst and preparation method thereof
  • MoSe 2-CdS/CdSe composite photocatalyst and preparation method thereof

Examples

Experimental program
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Effect test

preparation Embodiment 1

[0024] Preparation Example 1 (comparative sample)

[0025] Add 4.5g cadmium chloride hydrate, 4.5g thiourea and 60g ethylenediamine solution (mass ratio of cadmium chloride hydrate: thiourea: ethylenediamine: 100:100:1333) into the beaker, and stir for 1 hour with magnetic force. Pour the above mixture into a 100ml corrosion-resistant stainless steel hydrothermal reactor at room temperature, raise the temperature to 160°C, and seal the reaction for 48h. The suspension was centrifuged, the solid was washed with distilled water, and finally dried at 60°C for 12 hours to obtain CdS powder. The CdS prepared by this method has a nanorod structure, and the photocatalytic water splitting hydrogen production activity was evaluated under AM 1.5, and the hydrogen production rate was 0.012 mmol / g / h.

preparation Embodiment 2

[0027]Add 4.5g of cadmium chloride hydrate, 4.5g of thiourea and 60g of ethylenediamine solution (mass ratio of cadmium chloride hydrate: thiourea: ethylenediamine: 100:100:1333) into the beaker, and magnetically stir for 1 hour. Pour the above mixture into a 100ml corrosion-resistant stainless steel hydrothermal reactor at room temperature, raise the temperature to 160°C, and seal the reaction for 48h. Centrifuge the suspension, wash the solid with distilled water, and finally dry it at 60°C for 12 hours to obtain cadmium sulfide powder. The obtained 0.50g cadmium sulfide powder, and 0.60g sodium molybdate, 0.40g selenium powder are joined in the middle of 5ml hydrazine hydrate and 55ml deionized water (cadmium sulfide: sodium molybdate: selenium powder: hydrazine hydrate: the mass ratio of water is :100:120:80:1000:11000), magnetic stirring for 0.5h. Pour the above mixture into a 100ml corrosion-resistant stainless steel hydrothermal reactor at room temperature, raise the t...

preparation Embodiment 3

[0029] Add 4.5g of cadmium chloride hydrate, 4.5g of thiourea and 60g of ethylenediamine solution (mass ratio of cadmium chloride hydrate: thiourea: ethylenediamine: 100:100:1333) into the beaker, and magnetically stir for 1 hour. Pour the above mixture into a 100ml corrosion-resistant stainless steel hydrothermal reactor at room temperature, raise the temperature to 160°C, and seal the reaction for 48h. Centrifuge the suspension, wash the solid with distilled water, and finally dry it at 60°C for 12 hours to obtain cadmium sulfide powder. The obtained 0.5g cadmium sulfide powder, and 0.60g sodium molybdate, 0.40g selenium powder are joined in the middle of 10ml hydrazine hydrate and 50ml deionized water) cadmium sulfide: sodium molybdate: selenium powder: hydrazine hydrate: the mass ratio of water is :100:120:80:2000:10000), magnetic stirring for 1h. Pour the above mixture into a 100ml corrosion-resistant stainless steel hydrothermal reactor at room temperature, raise the te...

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Abstract

The invention provides a MoSe2-CdS / CdSe composite photocatalyst and a preparation method thereof. The preparation method includes the following steps that CdS nanorods are prepared by a hydrothermal method, selenium powder, sodium molybdate and cadmium sulfide are added at the same time, MoSe2 and CdSe are prepared on the CdS nanorods through an one-step hydrothermal method, and the MoSe2-CdS / CdSecomposite photocatalyst is prepared. According to the method, the preparation condition is very easy, raw materials are cheap, the 1T phase content in MoSe2 can be controlled by regulating the addition amount of hydrazine hydrate, and thus the phase content is regulated. The prepared photocatalyst has much higher photocatalytic activity than CdS under sunlight (AM1.5), the photocatalytic water splitting and hydrogen production performance is excellent, and the photocatalyst has great application potential in the field of new energy and environmental protection.

Description

technical field [0001] The invention belongs to the field of new materials, and relates to a metal chalcogen composite photocatalyst whose 1T and 2H phases can be regulated and a preparation method thereof, in particular to a MoSe 2 -CdS / CdSe composite photocatalyst and preparation method thereof. Background technique [0002] Energy and the environment are the two major themes of the 21st century, and the importance of solving energy shortages and addressing environmental issues is self-evident. Everything on the earth comes from the gift of the sun, and the use of sunlight is also the ultimate means for human beings. Sunlight is an endless renewable energy source, so it can be used to photocatalytically treat sewage and decompose water to produce hydrogen to solve environmental and energy problems. Cocatalysts play an important role in photocatalytic reactions, because the presence of cocatalysts can not only separate photogenerated electron holes, but also provide activ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/057C01B3/04
CPCY02E60/36
Inventor 彭峰刘运鹏乔智威谢谦曹正伟
Owner GUANGZHOU UNIVERSITY
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