Investigation on transition crystal of ordinary rutile TiO2 powder and its sonocatalytic activity

The transition crystal TiO2 sonocatalyst was prepared utilizing the method of ultrasonic irradiation in hydrogen peroxide solution. The sonocatalytic activity of the transition crystal TiO2 powder was validated through the degradation of methyl orange in aqueous solution by ultrasonic irradiation. The results show that the sonocatalytic activity of the transition crystal TiO2 powder is obviously higher than that of pure rutile and anatase TiO2 powders as well as mixed rutile and anatase TiO2 powders according to the proportion of corresponding transition crystal TiO2 catalyst. The degradation ratio of methyl orange in the presence of the transition crystal TiO2 catalyst surpasses 75% within 80 min ultrasonic irradiation, while the degradation ratios are 55.93%, 51.68% and 40.88%, respectively, for rutile, mixed and anatase TiO2 powders.