Investigation on the transition crystal of ordinary rutile TiO2 powder by microwave irradiation in hydrogen peroxide solution and its sonocatalytic activity

The transition crystal TiO2 catalyst with high sonocatalytic activity was obtained utilizing the microwave irradiation in hydrogen peroxide solution. At the same time a series of affecting factors (microwave irradiation time, heat-treated time and heat-treated temperature) to prepare the TiO2 catalyst on the sonocatalytic degradation of parathion were considered in this paper. The ultrasound of low power was used as an irradiation source to induce treated TiO2 particles to perform catalytic activity. The results show that the sonocatalytic activity of the transition crystal TiO2 powder is obviously higher than those of pure ordinary rutile and anatase TiO2 powders. At last, the parathion in aqueous solution was degraded completely and became some simple inorganic ions such as NO3-, PO43-, SO42-, etc. The degradation ratio of parathion in the presence of the transition crystal TiO2 catalyst attains nearly 80% within 60 min ultrasonic irradiation, while corresponding ones are only 65.23% and 53.88%, respectively, for pure ordinary rutile and anatase TiO2 powders.