Composite photocatalyst and preparation method thereof

Abstract

The invention discloses a composite photocatalyst and a preparation method thereof. The composite photocatalyst comprises, by weight, 10-20 parts of nanometer titanium dioxide, 4-10 parts of nanometer zinc oxide, 6-12 parts of nano-silica, 8-10 parts of nanometer activated carbon, 3-8 parts of zinc sulfide, 5-9 parts of tungsten oxide, 4-8 parts of cadmium sulfide, 3-5 parts of elemental platinum, 4-12 parts of sodium benzoate, 20-80 parts of anhydrous ethanol, 1-2 parts of an assistant, 2-3 parts of a surfactant and 10-15 parts of distilled water. Catalysts such as the nanometer activated carbon, nanometer titanium dioxide, nanometer zinc oxide and platinum are added in the manufacturing process against that problem that the chemical pollution adsorption effect of solid activated carbon is uncertain in order to make chemical pollutants adsorbed by a silane coupling agent and completely remove the pollutants. The composite photocatalyst can effectively remove, infiltrate, catalyze and degrade the free air state, the surface adsorption state and the internal binding state of the chemical pollutants released by decoration materials used for indoor decoration, and also can eliminate biological pollutants such as viruses and bacteria.

Description

technical field [0001] The invention relates to a photocatalyst, in particular to a composite photocatalyst and a preparation method thereof. Background technique [0002] In the prior art, in order to remove indoor chemical pollution and improve the indoor environment, products such as solid activated carbon, photocatalyst, and formaldehyde-dissolving enzyme are widely used at present. It mainly removes chemical pollutants through adsorption. Since no chemical reactions such as oxidation and decomposition occur, the removal effect is uncertain. [0003] Photocatalyst is a general term for a photo-semiconductor material with photocatalytic function represented by nano-scale titanium dioxide. It is coated on the surface of the substrate and has a strong catalytic degradation function under the action of ultraviolet light and visible light: it can effectively degrade air. Toxic and harmful gases; can effectively kill a variety of bacteria, and can decompose and harmless the t...

AI Technical Summary

Problems solved by technology

However, the coefficient of thermal expansion and contraction of this layer of film and the coefficient of thermal expansion and contraction of the furniture and wall surfaces cannot be exactly the same, because furniture and wall coatings are very different, so the usual film-forming technology will increase the temperature of the film over time. It will fall off, and the film-forming surface will be damaged after friction, causing the drug to fail

[0004] At present, the purification effect of the existing composite photocatalyst on formaldehyde, benzene, ammonia and other substances is not good enough, so a new composite photocatalyst and its preparation method are provided