Nano-photocatalyst and preparation method thereof

Abstract

The invention discloses a nano-photocatalyst. The nano-photocatalyst is prepared from, by weight, 30-35 parts of nanometer titanium dioxide, 5-10 parts of nano microcrystalline cellulose colloid (nano microcrystalline cellulose accounts for 2-3.5% by weight), 2-6 parts of adhesive, 1-3 parts of a titanate silane coupling agent, 1-3 parts of anion surfactant, 5-10 parts of dispersant and 80-85 parts of deionized water, wherein the nanometer titanium dioxide is porous anatase type nanometer titanium dioxide, the particle size of the nanometer titanium dioxide is 3-5 nm, and the nano microcrystalline cellulose in the nano microcrystalline cellulose colloid is of a net structure. The nano-photocatalyst and the preparation method thereof are environmentally friendly and free of pollution, the particle size of the porous anatase type nanometer titanium dioxide is 3-5 nm, the specific surface area is large, the nano microcrystalline cellulose of the net structure connects nanometer titanium dioxide to the surface, the distribution range of the nanometer titanium dioxide is expanded, the contact area between the nanometer titanium dioxide and a substrate is increased, and the purifying effect is improved. By means of the nano-photocatalyst, harmful gas degradation is conducted on newly-built shopping malls, large-scale office buildings, newly-decorated dwelling houses and the like, and harmful substances are converted 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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