【Abstract】 A variety of affecting factors on ultrasonic degradation of methylene blue in the presence of TiO₂ were studied.The results indicated that the effects of ultrasonic degradation were more apparent in the presence of nanometer rutile TiO₂ than of the solely ultrasonic ones.The sonochemical degradation kinetic of methylene blue in water was first-order.The degradation rate of methylene blue reached up to 80% in 120 min at ultrasonic frequency of 40kHz,power input of 50W,amount of catalyst of 1.0g/L,pH 5.16 and initial dye concentration of 5.0mg/L.Therefore,this method has better prospects in application.更多还原