Metal oxide loaded pucherite composite material as well as preparation and application thereof

A composite material and metal-loaded technology, which is applied in the direction of electrodes, electrolysis process, energy input, etc., can solve the problems affecting the efficiency of photocatalytic reaction and low carrier transmission rate, etc.

Active Publication Date: 2018-11-20
NORTHWEST NORMAL UNIVERSITY
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  • Abstract
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  • Application Information

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Problems solved by technology

However, BiVO 4 The low transport rate of carriers generated under light will affect the photocatalytic reaction efficiency, so it is urgent to

Method used

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  • Metal oxide loaded pucherite composite material as well as preparation and application thereof
  • Metal oxide loaded pucherite composite material as well as preparation and application thereof
  • Metal oxide loaded pucherite composite material as well as preparation and application thereof

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Embodiment Construction

[0032] Below by specific embodiment Co of the present invention 2 o 3 / BiVO 4 (OH - ) The preparation and properties of the material are further explained.

[0033] (1) Preparation of BiOI thin film

[0034] Electrolyte preparation for BiOI film preparation by electrodeposition:

[0035] a. Weigh 3~3.5g of potassium iodide (KI) in a dry and clean beaker, add 40~60mL of twice distilled water, stir under a magnetic stirrer to dissolve it, and obtain potassium iodide solution;

[0036] b. Use nitric acid (HNO 3 ) adjusting the pH of the above solution to be 1.5 to 1.6;

[0037] c. Weigh 0.9~1g bismuth nitrate pentahydrate (Bi(NO 3 ) 3 • 5H 2 O), add in above-mentioned potassium iodide solution, and vigorously stir until completely dissolving, and solution color changes into orange-red mixed solution gradually from black red;

[0038] d. Weigh 0.4~0.5g p-benzoquinone (C 6 h 4 o 2 ), added to 20mL of absolute ethanol, stirred and dissolved to obtain a brown p-benzoquin...

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Abstract

The invention provides a metal oxide loaded pucherite composite material. According to the metal oxide loaded pucherite composite material, BiVO4 is taken as a precursor material to deposit a precursor film on FTO conductive glass by using an electrochemical deposition method; subsequently the precursor film is roasted to synthesize a BiVO4 film; afterwards the BiVO4 film is subjected to alkalization treatment to obtain a BiVO4(0H-) material; and finally electric deposition is adopted for synthesizing Co2O3/BiVO4(0H-) of a nanometer flower structure composed of nanometer small particles. The structure effectively restrains recombination of photon-generated carriers and accelerates separation of electrons and cavities, so the metal oxide loaded pucherite composite material is excellent in PEC activity, is applied to a hydrogen evolution reaction as a photoelectric anode, and shows excellent electrolyzed water hydrogen generation performance.

Description

technical field [0001] The present invention relates to a BiVO 4 The preparation of the matrix composite material, especially relates to the preparation of a metal oxide bismuth vanadate composite material, which is mainly used as a photoelectric anode material for hydrogen evolution reaction. Background technique [0002] With increasing resource shortages, hydrogen energy is receiving widespread attention. Photoelectrochemical (PEC) cells have been uncovered as one of the highest profile routes to generate hydrogen. BiVO 4 As a typical n-type semiconductor, the band gap Eg is about 2.4eV, it has visible light activity, and it is used as a photoanode for hydrogen evolution reaction. However, BiVO 4 The low transport rate of carriers generated under light will affect the photocatalytic reaction efficiency, so it is urgent to further propose to reduce the BiVO 4 An efficient way to recombine photogenerated electrons and holes to enhance photocatalytic reaction efficiency...

Claims

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Application Information

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IPC IPC(8): C25B11/06C25B1/04
CPCC25B1/04C25B11/04C25B1/55Y02E60/36Y02P20/133
Inventor 王其召姜曼李银林黄静伟佘厚德王磊苏碧桃
Owner NORTHWEST NORMAL UNIVERSITY
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