Method for directly loading photocatalyst and filling by layers and member thereof

Abstract

The invention relates to a method for directly loading a photocatalyst and filling by layers and a member thereof. The method comprises preparation of a binding agent, ultrasonic washing of a carrier,binding of the carrier and the binding agent, ultrasonic loading of the photocatalyst and layered filling of the photocatalyst. The member comprises a metal net lining, a metal zip fastener and a plurality of layering grids, wherein the metal net lining is closed through the metal zip fastener; the metal zip fastener is connected onto the metal net lining through a metal wire which is slightly thinner than the metal net lining; one point of each layering grid is fixed on the metal net lining and then the layering grid is fixed on the metal net lining through the metal zip fastener. When the photocatalyst is loaded, high-temperature calcination is not needed; the viscosity of the binding agent is prevented from being damaged and a condition that the activity of the photocatalyst is reducedwhen the firing temperature is not proper is also avoided; the problem that the catalyst falls off, caused by subsequent high-temperature calcination, is also avoided; meanwhile, the loaded catalystcan have relatively high activity, relatively high light transmittance and relatively low pressure drop.

Description

technical field [0001] The invention relates to the technical field of photocatalysis, in particular to a method in which a photocatalyst is directly loaded on a carrier and can be loaded in layers and components thereof. Background technique [0002] Since the photocatalytic technology was proposed, the research on its treatment of pollutants has followed closely, and there are more and more researches on the application of photocatalytic technology to the removal of pollutants. In 1977, Frank et al. used TiO 2 After the photocatalytic decomposition of cyanide, research on the use of photocatalytic technology for the treatment of organic pollutants has sprung up. Photocatalysts have special electronic structures, electron transfer characteristics and light absorption properties, and their excited states exist for a long time. Under light radiation, electrons in the valence band are excited and transition to the conduction band position, forming a reduction complex in the c...

AI Technical Summary

Problems solved by technology

Although there are a variety of photocatalyst loading and loading methods, there are always various drawbacks.

For example, the widely used sol-gel method for loading photocatalysts involves first soaking the carrier in a specific catalyst precursor sol, drying and calcining at high temperature after gelling, but this method has always had the problem that the photocatalyst is not loaded firmly and the Problems such as the low activity of the fired photocatalyst

At present, the loading of most photocatalysts is that the photocatalyst is loaded on the carrier and directly loaded into the photocatalytic reactor. This kind of loading directly leads to the small porosity of the photocatalyst layer, which makes the light transmittance of the photocatalyst layer poor. cause waste of photocatalyst

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