Method for preparing photoelectrocatalysis electrode material capable of efficiently degrading organic pollutants

Abstract

The invention provides a method for preparing a photoelectrocatalysis electrode material capable of efficiently degrading organic pollutants. The photoelectrocatalysis electrode material is a TiO2 nano porous film which takes titanium sponge as a substrate, and the method comprises the following preparation steps: performing anodic oxidation on the titanium sponge piece subjected to ultrasonic oil removal and cleaning to obtain a highly orderly arranged TiO2 nano porous film, wherein the film is converted into an anatase structure from an undefined structure through annealing treatment, and the film can be used for degrading organic pollutants through photoelectrocatalysis. The material has the characteristics of light weight, low cost, high conductive property and high stability, the organic pollutants can be efficiently degraded, and the material can be applied to the fields such as photoelectrocatalysis water-splitting hydrogen production. The preparation method has the characteristics of simple process, convenient operation, low production cost and easy industrial production.

Description

technical field [0001] The invention belongs to the technical field of semiconductor photoelectric catalysis, and in particular relates to a method for preparing a photoelectric catalysis electrode material capable of efficiently degrading organic pollutants. [0002] Background technique [0003] Photocatalytic technology is a special heterogeneous catalytic technology developed on the basis of photocatalytic technology, which makes full use of the electric field to separate the photogenerated electron-hole pairs generated by photocatalysis, so as to effectively improve the catalytic effect. Photoelectrocatalytic technology is widely used in many fields such as water splitting and hydrogen production. In recent years, the use of photocatalytic to degrade organic pollutants, turn waste into profit, and protect the environment has also attracted widespread attention. The quality of photocatalytic effect is closely related to the selection and preparation of photoelectrocatal...

AI Technical Summary

Problems solved by technology

[0004]There are generally two types of TiO2 photoelectrodes: one is to press nano-TiO2 powder , coating and other methods to connect with the conductive substrate to make a photoelectrode or to prepare nano-TiO2 on the conductive substrate by sol-gel, hydrothermal, (electro) chemical deposition and other methods to obtain a photoelectrode. Such as CN102385997A discloses "multilayer structure nano titanium dioxide photoelectrode and its manufacturing method", CN102760581A discloses "a titanium dioxide photoelectrode and its preparation method", CN101404216B discloses "a titanium dioxide composite film photoelectrode and its preparation method", etc. , these photoelectrodes generally have problems such as the weak binding force between TiO2 and the conductive substrate, which affects the conductivity, and the TiO2 is easy to fall off from the substrate, and its use is very limited; another It is to carry out micro-plasma oxidation of titanium plate or anodic oxidation of titanium plate to generate TiO2 so as to obtain TiO2 photoelectrode, as disclosed in CN101713092B "a kind of micro-plasma The method for preparing titanium dioxide photoelectrode by oxidation, CN101519233B "Method for Photocatalytic Degradation of Organic Matter Using Short TiO2 Nanotube Array Thin Film Electrode", etc. This type of photoelectrode is due to TiO2 Generated from the titanium substrate, the two are closely connected, thus solving the problem that the weak binding force between TiO2 and the conductive substrate in the former type of TiO2 photoelectrode affects the conductivity, TiO2 is easy to fall off from the substrate, but this type of photoelectrode has problems of high quality and high cost due to the use of dense, high-density titanium plate or titanium sheet as the substrate

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