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Method for synchronously degrading pollutants in water through photoelectrocatalytic hydrogen evolution

A technology of photoelectric catalysis and pollutants, which is applied in the direction of water pollutants, chemical instruments and methods, light water/sewage treatment, etc., can solve the problems of difficult recycling and secondary pollution of water, and achieve easy recycling, promotion of separation, and avoidance of secondary pollution. The effect of secondary pollution

Pending Publication Date: 2021-07-09
HEFEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, related research has problems such as not being easy to recycle, causing secondary pollution to water, etc.

Method used

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  • Method for synchronously degrading pollutants in water through photoelectrocatalytic hydrogen evolution
  • Method for synchronously degrading pollutants in water through photoelectrocatalytic hydrogen evolution
  • Method for synchronously degrading pollutants in water through photoelectrocatalytic hydrogen evolution

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Embodiment 1

[0033] Silicon nanowire arrays prepared by metal-assisted chemical wet etching, and then loaded Co on the silicon nanoarrays by spin coating and air calcination 3 o 4 nanoparticles. Then, the H-type electrolyzer was used as the reaction device, and the n-SiNWs / Co 3 o 4 The electrode is a photoanode, p-SiNWs / Co 3 o 4The electrode is a photocathode, the Ag / AgCl electrode is a reference electrode, and a xenon light source is used to irradiate the cathode and anode to form a photoelectrochemical catalytic reactor. Under the action of electric field and light source, photocatalytic hydrogen evolution and degradation of pollutants in water are realized simultaneously.

[0034] SiNWs / Co used in the described processing method 3 o 4 The electrode preparation mainly adopts the metal-assisted chemical etching method to prepare the silicon nanowire array, and the Co(NO 3 ) 2 ·6H 2 O ethanol solution was loaded on the surface of silicon nanowire arrays and calcined in air.

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Abstract

The invention discloses a method for synchronously degrading pollutants in water by photoelectrocatalytic hydrogen evolution, which comprises the following steps of: preparing a silicon nano array by adopting a metal-assisted chemical wet etching method, loading Co3O4 nano particles on the silicon nano array through spin coating and air calcination, and simultaneously carrying out photoelectrocatalytic hydrogen evolution by adopting an H-type electrolytic cell as a reaction device, an n-SiNWs / Co3O4 electrode as a photoanode, a p-SiNWs / Co3O4 electrode as a photocathode, and an Ag / AgCl electrode as a reference electrode, and a xenon lamp light source is used for irradiating the cathode and the anode to form a photoelectrochemical catalytic reactor, so that photoelectrocatalytic hydrogen evolution and degradation of pollutants in water can be synchronously realized. The method has the beneficial effects that SiNWs and loaded Co3O4 can form a heterojunction, so that the separation of photo-induced electron hole pairs is promoted, and the photoelectrocatalytic activity is further improved; the n-SiNWs / Co3O4 photoanode can activate PMS to generate hydroxyl free radicals and sulfate free radicals to degrade organic pollutants, so that the n-SiNWs / Co3O4 photoanode is environment-friendly; pollutants can be used as a .OH trapping agent to promote the consumption of light-induced holes, enough photo-induced electrons are provided for the p-SiNWs / Co3O4 photoelectric cathode, and the hydrogen evolution efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of hydrogen evolution of catalytic materials, in particular to a method for synchronously degrading pollutants in water by photoelectric catalysis of hydrogen evolution. Background technique [0002] With the development of industrial society, human beings are not only facing the crisis of fossil energy depletion, but also water pollution. In recent years, due to the abuse and insufficient treatment of antibiotics in medical and aquaculture production, antibiotics have been widely distributed and super viruses have been produced, which seriously endanger the ecological environment and human health. Therefore, human beings urgently need to develop sustainable clean energy such as wind energy, hydrogen energy, etc., and degrade antibiotics in water bodies to clean water sources. At present, photocatalytic hydrogen production technology is favored by many researchers. At the same time, photocatalytic degradati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/30C02F101/30
CPCC02F1/46109C02F1/30C02F2001/46133C02F2305/10C02F2101/30
Inventor 吕珺姚丽吴玉程王博徐光青
Owner HEFEI UNIV OF TECH
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