Preparation method of visible-light response tungsten trioxide-bismuth vanadate heterojunction thin film electrode

A thin-film electrode and heterojunction technology, applied in the field of nanomaterials, can solve the problems of low cost-effectiveness, slow generation, decreased electrode charge transport performance, etc., and achieve high photoelectric efficiency and good effect.
CN106745474AActive Publication Date: 2017-05-31SHANGHAI JIAO TONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI JIAO TONG UNIV
Publication Date
2017-05-31

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Abstract

The invention discloses a preparation method of a visible-light response tungsten trioxide-bismuth vanadate heterojunction thin film electrode. The preparation method comprises the following steps: dissolving 1-3g of Bi(NO3)3.5H2O in 100mL of 2mol / L acetic acid aqueous solution to obtain a bismuth nitrate solution; dissolving 0.2-1g of NH4VO3 in 100mL of 50-200mmol / L H2O2 aqueous solution to obtain a peroxy-vanadic acid solution; spinning the bismuth nitrate solution on the surface of a WO3 film, and spinning the peroxy-vanadic acid solution on the surface of the WO3 film; repeating the spinning processes for 5-20 times; performing heat treatment on the obtained film once for 1-6 hours at 400-550 DEG C; and naturally cooling to obtain the WO3 / BiVO4 heterojunction thin film electrode. The method disclosed by the invention has the characteristics of simplicity, mildness and high efficiency; and the prepared WO3 / BiVO4 heterojunction thin film electrode has the advantages of good visible light absorbability and stability, high photoelectric efficiency and good photoelectrocatalytic degradation effect of organisms, and can be applied to the fields such as photoelectrocatalytic hydrogen production, organism degradation and sensors.
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Description

technical field

[0001] The invention relates to a photoelectric catalytic electrode material, in particular to a method for preparing a visible light-responsive tungsten trioxide-bismuth vanadate heterojunction thin film electrode, which belongs to the field of nanomaterials.

[0002] technical background

[0003] Photocatalytic technology based on sunlight degradation of organic matter, hydrogen production and sensor technology is a promising new technology. In this technology, the performance of the photocatalytic electrode directly affects the effect of the photoelectric catalytic system. Therefore, the preparation of photocatalytic electrode materials is a hot research topic in the field of photoelectric catalysis.

[0004] Currently, with BiVO 4 Modified WO 3 WO 3 / BiVO 4 Heterojunction thin films with BiVO-based 4 Excellent visible light absorption performance (can absorb 30% of sunlight) and based on WO 3 Excellent charge transport properties (12cm 2 V -1 s -1...

Claims

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