Preparation method of high-catalytic activity ceramic-based stannic oxide anode

Abstract

A preparation method of a high-catalytic activity ceramic-based stannic oxide anode comprises the following steps of after ultrasonic treatment on a silicon carbide matrix in tetrabutyl titanate-contained precursor solution, forming a titanium oxide layer on the surface of the silicon carbide matrix through a thermal oxidation method; then, performing reduction treatment on the titanium oxide layer on the surface of the silicon carbide matrix by utilizing an electric reduction method under room temperature to form a titanium hydride interlayer; and connecting an electrically-reduced silicon carbide matrix as a cathode with the negative pole of a power supply, and preparing an antimony doped stannic oxide coating on the surface of the silicon carbide matrix by utilizing an electro-deposition-thermal oxidation method in electroplate liquid containing stannum and antimony. As the anode is of a porous structure, the actual catalytic area of the anode is increased; active sites are increased, so that the anode is high both in electrocatalytic activity and oxygen evolution potential; and the anode is more ideal than a traditional electrode both in organic matter removal efficiency and energy consumption. As the increase of coating capacity, the service life of the anode is effectively prolonged, and the anode is suitable for being applied to industrially electrolyzing waste water ona large scale.

Description

technical field [0001] The invention belongs to the technical field of preparation of electrochemical catalytic electrodes, and in particular relates to a preparation method of a ceramic-based tin dioxide anode with high catalytic activity. Background technique [0002] In recent years, with the continuous development and growth of my country's industry, the ensuing environmental problems have sounded the alarm to the whole society and even the whole mankind time and time again. The problem of water pollution has always attracted people's attention. Due to the complexity and diversity of industrial wastewater components, its treatment has become a difficult point, and there is no universally applicable treatment strategy. Especially organic industrial wastewater, which contains a large amount of organic matter, and its BOD and COD values ​​are large, which can easily cause eutrophication of the water body and cause great harm. For the treatment of organic industrial wastew...

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Problems solved by technology

[0007] At present, there are cracks on the surface of traditional titanium-based antimony-doped tin dioxide anode due to heat treatment, which makes the electrolyte easy to penetrate, and the surface of the titanium substrate is oxidized to titanium dioxide to passivate the electrode, and the traditional planar titanium substrate electrode is limited. surface area, the surface of the electrode has fewer active sites (oxygen vacancies), which leads to the problem of lower electrode activity and short lifetime

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