Vermiculite Loaded Bismuth Tungstate Light Purify Air

In recent years, with the indoor air pollution indoor closed decoration and decoration materials, serious harm to human health, attracted the attention of the people, for the indoor air pollution is becoming more and more serious, for all kinds of indoor air purification technology has emerged, many people do not know, tungsten can not only be used for photocatalytic purification of wastewater, can also be used to air purification.

At present, the photocatalytic air purification material is nano photocatalyst agent load on purifying channel metal mesh and filter cloth in the binder or will photocatalyst is fixed on the glass and ceramic carrier, purifying the air, photocatalyst used two titanium dioxide, zinc tungstate, bismuth tungstate, in order to enhance the effect of air purification, people will find a carrier as photocatalyst, such as using vermiculite as carrier photocatalyst supported by bismuth tungstate, and strong adsorption characteristics of porous structure of vermiculite, enhance the effect of bismuth tungstate.

Vermiculite refers to the structure unit layer for 38 face 2: type 1 and 28 face Portland, the crystal structure is a structural unit composed of three basic structure layer combination layer repeated accumulation, each structure unit layer, the middle layer of silicon magnesium aluminum hydroxide, upper and lower layers are four basic silica the body, with water molecules and exchangeable cations between the layers, compared with other carriers, with vermiculite has strong cationic exchange capacity, using the oleophilic and hydrophobic properties, can adsorb more organic matter, can be formed around the bismuth tungstate organic pollutants, improve the photocatalytic efficiency of bismuth tungstate; Vermiculite has good crystallization and stable properties. When calcined at high temperature, the inner pore is not easy to collapse. Besides, it has excellent properties such as heat preservation, light weight, frost resistance, antibacterial and so on.

The application of vermiculite to bismuth tungstate not only solves the problem of poor adsorption of organic pollutants by photocatalyst, but also avoids photocatalytic degradation of matrix materials. Composite air purification with high adsorption and stability of the material at the same time, because of its strong oxidation, can be oxidized surface contaminants, keep oneself clean, under visible light through the photocatalytic degradation of toxic gases, and turn it into a non-toxic tasteless substance, can achieve efficient and rapid air purification purposes, has broad the application prospect and development prospect.

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