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MoS2/TiO2NTs heterojunction photo-electro-catalyst substituting noble metal Pt sheet for hydrogen evolution and preparation method of MoS2/TiO2NTs heterojunction photo-electro-catalyst

A technology of noble metals and catalysts, applied in the field of photoelectric catalysts, can solve the problems that are difficult to be widely used in industrial production, and achieve the effect of increasing reaction active sites, simple method and process, and increasing adsorption

Inactive Publication Date: 2017-04-26
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, limited by its high price, it is difficult to be widely used in industrial production and can only be used in experimental research

Method used

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  • MoS2/TiO2NTs heterojunction photo-electro-catalyst substituting noble metal Pt sheet for hydrogen evolution and preparation method of MoS2/TiO2NTs heterojunction photo-electro-catalyst
  • MoS2/TiO2NTs heterojunction photo-electro-catalyst substituting noble metal Pt sheet for hydrogen evolution and preparation method of MoS2/TiO2NTs heterojunction photo-electro-catalyst
  • MoS2/TiO2NTs heterojunction photo-electro-catalyst substituting noble metal Pt sheet for hydrogen evolution and preparation method of MoS2/TiO2NTs heterojunction photo-electro-catalyst

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Experimental program
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Effect test

Embodiment 1

[0028] The industrial titanium sheet was cut to a size of 33×20×0.3mm, pressed to make it flat, ultrasonically cleaned with acetone, ethanol, and ultrapure deionized water for 20 minutes, and immersed in ultrapure deionized water for storage until use. Prepare a fresh diethylene glycol (DEG) mixed solution with a concentration of 1% HF before preparation, take out the pretreated titanium sheet and dry it, and use it as an anode to immerse it in the prepared electrolytic solution with an effective electrolytic area of ​​20×20mm. The cathode uses a 20×20×0.1mm platinum sheet electrode, connected to a DC power supply, adopts a constant voltage DC electrolysis method, adjusts the voltage to 60V, and controls the electrolysis time to 120h. After the anodizing process is over, turn off the power, and the surface will grow TiO 2 The titanium sheet of the nanotube array was taken out and washed in ultra-pure deionized water, dried, put into a muffle furnace and calcined at 450°C for 2...

Embodiment 2

[0030] Weigh 10 mg of sodium molybdate (Na 2 MoO 4 ) and 20mg of thioacetamide (TAA) were dissolved in 20ml of DEG, stirred for 20min, and put into the prepared spacing TiO 2 nanotube array, put it in an oven at 200°C for 24 hours, wash the black electrode three times with water and ethanol, and then dry it in vacuum at 80°C to obtain the catalyst MoS 2 / TiO 2 array of nanotubes.

Embodiment 3

[0032] Weigh 10 mg of sodium molybdate (Na 2 MoO 4 ) and 30mg of thioacetamide (TAA) were dissolved in 20ml of DEG, stirred for 20min, and put into the prepared spacing TiO 2 nanotube array, put it in an oven at 200°C for 24 hours, wash the black electrode three times with water and ethanol, and then dry it in vacuum at 80°C to obtain the catalyst MoS 2 / TiO 2 array of nanotubes.

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Abstract

The invention discloses a MoS2 / TiO2NTs heterojunction photo-electro-catalyst substituting a noble metal Pt sheet for hydrogen evolution and a preparation method of the MoS2 / TiO2NTs heterojunction photo-electro-catalyst. The MoS2 / TiO2NTs heterojunction photo-electro-catalyst is synthesized by a two-step method. Firstly, a metal Ti sheet is subjected to anodic oxidation and TiO2NTs having a high specific surface area and gaps is formed by taking a diglycol and HF system as a solvent and the Ti sheet as a titanium source through an anodic oxidation process; secondly, MoS2 is loaded onto the prepared TiO2NTs by taking sodium molybdate and thiacetamide as a Mo source and a S source respectively, and taking diglycol as a solvent through kettle heating. A TiO2 surface layer structure, by using the specific surface area of a MoS2 layer, can improve the absorption to H2O molecules; in addition, MoS2 has excellent electron conduction ability and side belt effect, so that the number of reaction active sites are increased; photoelectrocatalysis collaboration can effectively separate electrons from cavities, so that the photocatalysis activity is improved, and hydrogen can be produced rapidly and efficiently by the decomposition in the presence of the MoS2 / TiO2NTs heterojunction photo-electro-catalyst.

Description

technical field [0001] The invention relates to a photoelectric catalyst, specifically MoS synthesized by an in-situ loading method to replace noble metal Pt sheets for hydrogen evolution 2 / TiO 2 NTs heterojunction photocatalyst and preparation method thereof. Background technique [0002] With the growth of the world's population and economy, environmental and energy issues have become two major factors restricting human development. Photocatalysts have unique advantages in photoelectric synergistic water splitting for hydrogen production. Compared with traditional hydrogen production, photoelectrocatalysis has unique advantages: mild reaction conditions, low energy consumption, less secondary pollution, substitution of noble metal Pt, etc., and has very important development and application prospects in terms of environment and energy. In recent years, there have been more and more studies on it. As we all know, Pt has been widely used as a photoelectric catalyst for ...

Claims

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Application Information

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IPC IPC(8): B01J27/051C25B11/06C25B1/10
CPCB01J27/051C25B1/55C25B1/04C25B9/73C25B11/057C25B11/075C25B11/051B01J35/33B01J35/39Y02E60/36
Inventor 李贵生崔玫瑰潘东来赵小龙李和兴
Owner SHANGHAI NORMAL UNIVERSITY
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