Experimental Study of Nanometer TiO_2 Photocatalysis Material in Air Purification

摘要

With the enhancement of environmental awareness, controlling oil mist in machinery processing workshop has become more and more important. Nanometer titanium dioxide (TiO2) photocatalysis material can treat with manifold pollutants, which is widely applied with its merits of decomposing products sufficiently and no secondary pollution. The nanometer TiO_2 photocatalyst was prepared by using the sol-gel method on the optimum formulation that showed a higher activity. Then TiO_2 photocatalyst was prepared by dip-coating technique using the non-woven fabric adhered on it with straight as composite support. The efficiency of suppression of oil mist was in comparison with ordinary materials. The purification of the nanometer TiO_2 photocatalysis sieve against oil mist of non-woven fabric was investigated in different time in solar radiation at room temperature. It oxidizes pollutants of oil mist to CO_2 and H_2O. It is known that the photodegradation effect is good and the reaction is fast. It also showed the nanometer TiO_2 photocatalysis material is ideal material for suppressing oil mist in the air. At last, the application data of this technology in the air purification as well as its problems and trends were presented. The prospect of application was previewed.