Photocatalyst hydrosol with high catalytic degradation performance and its production process

Abstract

The invention discloses a photocatalyst hydrosol with high catalytic degradation performance and a production process thereof. The production process of the photocatalyst hydrosol with high catalytic degradation performance comprises the following steps: adding sodium hexametaphosphate in water, stirring to obtain a mixed solution; adding titanium dioxide or titanium dioxide / graphene composite material, and bismuth molybdate or selenium to the mixed solution Load bismuth molybdate and continue to stir; then add hydrogen peroxide solution, shear emulsify, and stand to obtain an emulsion; add a stabilizer to the emulsion, continue to stir, and then adjust the pH to obtain the photocatalyst hydrosol with high catalytic degradation performance. The photocatalyst hydrosol with high catalytic degradation performance obtained by the invention has uniform particle size, good dispersion, high stability, excellent light absorption performance and good photocatalytic effect, and stable performance, simple preparation process, mild preparation conditions, and has the advantages of: Good application value.

Description

technical field [0001] The invention relates to the technical field of photocatalysts, in particular to a photocatalyst hydrosol with high catalytic degradation performance and a production process thereof. Background technique [0002] Photocatalyst is a nano-scale metal oxide material, which is coated on the surface of the substrate, and under the action of light, it produces a strong catalytic function, which can effectively degrade toxic and harmful gases in the air; kill a variety of bacteria, and can Toxins released by bacteria or fungi are decomposed or harmlessly treated; at the same time, photocatalysts also have functions such as deodorization and antifouling. The necessary conditions for photocatalysis to work are photocatalysts and light with suitable wavelength conditions. At present, the most commonly used photocatalyst is titanium dioxide material. The reason why titanium dioxide can play a photocatalytic role is determined by its own physical and chemical p...

AI Technical Summary

Problems solved by technology

However, titanium dioxide has a large band gap (3.0eV for the rutile phase and 3.2eV for the anatase phase) and can only be excited by ultraviolet light, which severely limits its catalytic activity and practical use conditions; on the other hand, when titanium dioxide is subjected to When light is irradiated, the excited electron-hole pairs cannot migrate to the surface in time, and rapidly recombine inside, which cannot play a catalytic effect and also reduces its catalytic activity.