Photocatalytic material with high stability and preparation method thereof

Abstract

The invention discloses a photocatalytic material with high stability. The photocatalytic material is prepared from multiple layers of materials of a carrier, an adhesion layer, a transparent particlelayer and a catalyst layer. Transparent particles are adhered to the carrier to form a light-transmitting and stable rough surface, and a photocatalytic layer and the adhesion layer are separated. The transparent particle layer greatly increases the surface area of the carrier and further increases the bonding force with the catalyst layer, illumination can be evener, high activity of the photocatalytic layer is kept, and membrane stability is simultaneously and greatly enhanced. The method has the advantages of simple product structure, low cost, high stability, high catalyzing efficiency and generality in photocatalytic purification of volatile chemical gas.

Description

technical field [0001] The invention relates to a photocatalytic material with high stability, and also relates to a preparation method of the photocatalytic material with high stability, which belongs to the technical field of environmental protection material preparation. Background technique [0002] Photocatalytic technology has shown broad application value and attractive application prospects in the fields of environment (purifying air, eliminating chemical pollutants) and energy (photocatalytic water splitting to produce hydrogen). Various photocatalytic materials and photocatalytic products have begun to be well applied in households, industries and other places. In terms of exhaust gas purification, photocatalytic technology has low energy consumption, the decomposition products are water and carbon dioxide, and there is no secondary pollution, which especially has a greater competitive advantage. However, in practical applications, the loading of photocatalysts, t...

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Problems solved by technology

[0003] At present, in the photocatalytic technology of exhaust gas purification, the photocatalyst usually needs to be loaded on a certain carrier. The carrier provides the mechanical support of the photocatalyst, which overcomes the disadvantages of difficult recovery and large loss of the catalyst of the suspended photocatalytic method, but for The exposed area of ​​the photocatalyst on the surface and the resultant force between the carrier and the catalyst have high requirements, and there are also strict requirements on the safety and durability of the material in the ultraviolet environment

Generally, the porous nanostructure has the advantage of large surface area, but its structure is relatively loose, the binding force is not strong, and the catalyst powder is easy to fall off; therefore, from a practical point of view, the prior art mainly adopts adding a binder in the photocatalyst to increase The binding force with the carrier, but the binder fills the gap between the nano-photocatalysts, so there are shortcomings of relatively small surface area and insufficient activity

While using complex carriers, for example, patent 201010548541.X uses carbon fiber as a carrier, 200510095107.X uses dispersion fiber, and patent 201710297904.9 uses polytetrafluoroethylene ultrafine fibers as a carrier. Others such as zeolite, activated carbon, porous metal foam, etc., although they can be The surface area is increased to a certain extent, but because the material is opaque, only the part of the surface exposed to light can produce photocatalysis, which has the disadvantages of opacity and low light utilization efficiency

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