Application of Nanometer TiO₂ Photocatalysis Material in Air Purification

The production of oil mist in machinery processing workshop is harmful. To control concentration of oil mist, the TiO₂ which can treat with manifold organic pollutants is used to purify oil mist. At first, the nanometer TiO₂ is prepared using the sol-gel method on the optimum formulation that showed a higher activity. Then it is treated by dip-coating technique using the non-woven fabric as composite support. The efficiency of suppression of oil mist is compared with ordinary materials. With the increase of time, the purification of the nanometer TiO₂ photocatalyst sieve against oil mist of non-woven fabric is investigated in solar radiation at room temperature. It oxidizes pollutants of oil mist to CO₂ and H₂O. The experiments demonstrat oil mist is oxidized on the TiO₂ sol at the 22^nd minute with a maximum capacity of 0.3219g. It infers from the experiments the photodegradation effect is high and the reaction is fast. It also concludes that the nanometer TiO₂ photocatalysis material is an ideal material for suppressing oil mist in air. At last, a status the application of technology in air purification as well as its problems and trends are presented. The technique has a promising prospect to solve the increasing air problem of the workshop.