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Activity regulation method of photoelectrocatalytic semiconductor materials

A photoelectric catalysis and semiconductor technology, applied in the direction of chemical instruments and methods, physical/chemical process catalysts, electrodes, etc., can solve the problems of photocatalysis that cannot achieve activity regulation, change the regulation of modified ions, and reduce the absorption efficiency of light sources, etc., to achieve Overcome the reduction of carrier density, accelerate the catalytic process, and overcome the effect of reducing the absorption efficiency of light sources

Active Publication Date: 2022-05-17
TIANJIN UNIV
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Problems solved by technology

On the other hand, due to the need to make semiconductor materials as electrodes in the photoelectrocatalytic process, semiconductor materials that lose their free powder form often reduce the absorption efficiency of light sources; in addition, the production of electrodes changes the regulation of modified ions on the crystal lattice. Therefore, photocatalysis often fails to achieve the effect of activity regulation

Method used

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  • Activity regulation method of photoelectrocatalytic semiconductor materials
  • Activity regulation method of photoelectrocatalytic semiconductor materials
  • Activity regulation method of photoelectrocatalytic semiconductor materials

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Embodiment Construction

[0021] In order to better understand the present invention, the present invention will be further described below in conjunction with specific drawings.

[0022] 1. Sodium Chloride's Control of Oxygen Evolution Activity of Bismuth Vanadate Catalyst for Photocatalytic Water Splitting

[0023] 1.1 Experimental part

[0024] Weigh 3.88g of bismuth nitrate pentahydrate and add it to 40mL solution containing 16mL acetic acid and 1.6mL concentrated nitric acid (70wt%). After being dissolved, it is used for electrodeposition. Conductive glass is used as the electrode with an area of ​​1.0×2.5cm 2 . Shanghai Chenhua CHI760E electrochemical workstation was used for electrodeposition, and a classic three-electrode system was selected, in which Pt wire was used as the counter electrode, Ag / AgCl (saturated KCl) electrode was used as the reference electrode, and conductive glass was used as the working electrode. The electrodeposition conditions were that the external applied voltage was...

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Abstract

The invention provides a method for regulating the activity of a photoelectric catalysis semiconductor material, which uses halide ions to modify the surface of an electrode material made of a semiconductor material. The method of the invention can significantly improve the catalytic activity of the semiconductor material and reduce the catalytic cost.

Description

technical field [0001] The invention belongs to the technical field of photoelectric catalysis semiconductors, and in particular relates to a control method for photoelectric catalysis water splitting semiconductor materials. Background technique [0002] Photocatalytic water splitting is a very potential technical means to solve today's energy and environmental problems. Semiconductors represented by bismuth vanadate, tungsten trioxide and graphene carbon nitride can absorb a large amount of visible light due to their narrow band gap. At the same time, it also has the characteristics of high catalytic efficiency and good stability, so it has a wide range of applications. In addition to light absorption, the separation and transfer of carriers and surface-interface chemical reactions are the key factors affecting the photocatalytic performance. Previous studies have shown that bisvanadate exposed to the (040) crystal face has better photocatalytic activity in terms of water...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/073C25B1/04C25B1/55C25B11/087
CPCB01J27/10B01J27/24B01J35/004B01J35/0033C25B1/04C25B1/55C25B11/073Y02E60/36
Inventor 刘乐全张琪琪刘敏
Owner TIANJIN UNIV
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