A kind of nano photocatalyst and preparation method thereof

Abstract

The invention discloses a nano photocatalyst, which includes the following components by weight: 30-35 parts of nano titanium dioxide; 5-10 parts of nano microcrystalline cellulose colloid (nano microcrystalline cellulose is 2-3.5wt / %); 2-6 parts of adhesive; 1-3 parts of titanate silane coupling agent; 1-3 parts of anionic surfactant; 5-10 parts of dispersant; 80-85 parts of deionized water; nano-titanium dioxide is porous anatase type Nano-titanium dioxide, the particle size of nano-titanium dioxide is 3-5nm, and nano-microcrystalline cellulose in nano-microcrystalline cellulose colloid has a network structure. The present invention is green and pollution-free. The particle size of the porous anatase nano-titanium dioxide is 3-5nm, and the specific surface area is large. The nano-microcrystalline cellulose with a network structure connects the nano-titanium dioxide to the surface, increasing the distribution range and interaction of the nano-titanium dioxide. The contact area of ​​the substrate improves its purification effect. Degrade harmful gases in newly built shopping malls, large office buildings, newly renovated residences, etc., and convert harmful substances into active substances such as [O] and [HO].

Description

technical field [0001] The invention relates to the technical field of air purification, more specifically, it relates to a nano photocatalyst and a preparation method thereof. Background technique [0002] Today, the rapid development of the construction industry has promoted the consumption of building materials. However, newly renovated residential buildings, commercial buildings, and cars that have just left the factory, decoration materials, interior walls, furniture, curtains, desks, and car decorations will all bring formaldehyde. Chemical pollution such as benzene series or TVPC can cause irreversible and serious damage to the human respiratory system, hematopoietic system and immune system. On the other hand, due to the increasingly serious environmental pollution, automobile exhaust and PM2.5 particles will cause serious harm to human internal organs. Therefore, people are paying more and more attention to indoor and outdoor air quality. Photocatalyst is a nano-sc...

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Problems solved by technology

[0008] In the reference document, titanium dioxide is ground and broken by physical means to make it reach the nanometer level. However, the nano-titanium dioxide obtained by this method has a large particle size, resulting in a small specific surface area.

Under the catalysis of ultraviolet light, titanium dioxide purifies the harmful substances adhered to its surface. Therefore, when the same amount is used, the purification effect of the photocatalyst with larger particle size of titanium dioxide is weak; Only when it comes into contact with microbial particles and harmful gases can it oxidize and decompose, while nano-titanium dioxide with a larger particle size, when sprayed on the substrate, has a smaller contact area with the inorganic adhesive, so it cannot be firmly adhered to the substrate. on the substrate, resulting in low purification efficiency of the photocatalyst on the substrate

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