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Preparation of copper sulfide/bismuth vanadate double-layer film composite and its application as photoanode

A composite material, bismuth nitrate pentahydrate technology, applied in the field of preparation of CuS/BiVO4 double-layer film composite material, to achieve the effects of reducing recombination, good conductivity, and improving photoelectrochemical performance

Active Publication Date: 2021-03-23
NORTHWEST NORMAL UNIVERSITY
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, transition metal sulfide (CuS) is also a catalyst with excellent physical and chemical properties. There is no report on the application as a photoanode material

Method used

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  • Preparation of copper sulfide/bismuth vanadate double-layer film composite and its application as photoanode
  • Preparation of copper sulfide/bismuth vanadate double-layer film composite and its application as photoanode
  • Preparation of copper sulfide/bismuth vanadate double-layer film composite and its application as photoanode

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Embodiment Construction

[0026] The present invention will be described below for CUS / BIVO 4 The preparation, performance and application of the double membrane further illustrates.

[0027] First, CUS / BIVO 4 Double film preparation

[0028] (1) Preparation of flower CUS

[0029] 2.046 g of copper chloride (Cucl 2 · 2h 2 O), 1.827 g of thiourea was dissolved in 28 ml of secondary distilled water and 14 ml unhydrate ethanol mixture. Then put CUCL 2 · 2h 2 O solutions were slowly added to the thiourea solution, and all the solution was added to the solution, and the suspension at this time was stirred at room temperature for 30 min. The reaction liquid after the stirring was transferred to 100 ml of polytetrafluoroethylene liner, 140 ° C heating 12 h, after completion of the reaction, naturally cooled to room temperature to give the ink green precipitate. The resulting precipitate was centrifuged, and the dried water was washed several times, and 6 h was dried at 60 ° C for several distilled water.

[0...

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Abstract

The invention discloses a method for preparing a copper sulfide / bismuth vanadate double-layer membrane composite material. The method first uses an electrochemical deposition method to prepare porous BiVO. 4 Photoelectrode, and then use a simple drop coating method to load CuS on BiVO 4 On the electrode, CuS / BiVO is obtained 4 Double-layer membrane composite material. Since CuS is a narrow bandgap p-type semiconductor, its bandgap width is almost close to that of the semiconductor Si material, and it has good visible light absorption performance and conductivity; BiVO 4 It is an n-type semiconductor with high visible light responsiveness and adjustable electronic structure. The two are combined to form a double-layer CuS / BiVO 4 The thin film constitutes a p-n heterostructure in which the valence band and conduction band intersect. This structure facilitates the rapid separation of photogenerated carriers and reduces the recombination of electron-hole pairs, thereby improving BiVO 4 The excellent photoelectrochemical properties make it a good application prospect as a photoanode material in photocatalytic water splitting and hydrogen production reactions.

Description

Technical field [0001] The present invention relates to a BIVO 4 Basic composite materials, particularly involving a CUS / BIVO 4 The method of preparing a double film composite material is mainly used as a photoelectric anode material to photocatalytic decomposition aquatic hydrogen reaction. Background technique [0002] Due to the limited resources available on earth, the serious phenomenon of excessive consumption of energy in the past few years has caused energy shortage. Therefore, developing new energy is a problem that all human needs needs to be solved. Solar energy is an inexhaustible renewable energy source, which converts it into a variety of forms of energy such as electrical energy and hydrogen energy by various methods. Hydrogen energy is considered to be ideal cleaning energy, due to its high combustion value, and has extensive production of fossil fuel to solve energy shortages and environmental pollution problems in place of the product without contamination. Ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/04B01J37/02B01J37/34C25B1/04C25B11/091
CPCC25B1/04C25B11/04B01J27/04B01J37/0215B01J37/348B01J35/39B01J35/33Y02E60/36Y02P20/133
Inventor 王其召高子茜和继娟石彦彪黄静伟王磊佘厚德白燕苏碧桃
Owner NORTHWEST NORMAL UNIVERSITY
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