Preparation technology of a new lead dioxide electrode modified by tetratitanium heptoxide nanotubes

Abstract

The invention discloses a preparation technology of a novel tetratitanium heptoxide nanotube middle layer high-performance modified lead dioxide electrode. The preparation technology uses titanium mesh as the base, prepares anatase titanium dioxide nanotubes by anodic oxidation method, prepares tetratitanium heptoxide nanotubes by high-temperature reduction method, dissolves tin salt and antimony salt in a certain proportion to form a coating solution, and passes through The oxide of tin and antimony formed by thermal decomposition is used as the intermediate layer to improve the stability of the electrode. Preparation of β-PbO on Sn-Sb interlayer by electrodeposition technique 2 Or ion, nanoparticle doped modified β‑PbO 2 . The resulting novel nanotubular modified β-PbO 2 The electrode is dense and uniform, the particle size is small, and it has a large catalytic active area. At the same time, the surface active layer has strong adhesion, is not easy to fall off, is resistant to acid and alkali corrosion, has good catalytic activity and service life, is suitable for industrial production, and can be widely used in the field of sewage treatment by electrocatalytic oxidation technology, and has a good market prospect.

Description

technical field [0001] This patent belongs to the technical field of water treatment, and relates to a preparation technology of a novel high-performance modified lead dioxide electrode in the middle layer of tetratitanium heptoxide nanotubes. Background technique [0002] Sewage treatment has always been a research hotspot. With the development of agricultural technology, more and more pesticides are used in crop production. Most of these pollutants are organic pollutants. When they are discharged into water, they will cause damage to the ecological environment. Among the sewage treatment technologies, the electrocatalytic oxidation method has low equipment requirements, fast processing speed, simple operation, clean and pollution-free, and is easy to be applied on a large scale. It is an environmentally friendly technology. It has been widely concerned in recent years and is an important development direction in the field of sewage treatment in the future. The properties...

AI Technical Summary

Problems solved by technology

However, compared with BDD electrodes, PbO 2 The amount of hydroxyl radicals produced is less, and PbO 2 There is a large internal stress inside the coating, and the nascent oxygen generated during the electrolysis process can easily diffuse through the surface layer to the substrate, which will passivate the substrate, peel off the coating, and reduce the electrochemical stability and service life of the electrode.