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.