纳米TiO2催化超声降解酸性品红溶液的性能研究

采用处理过的市售的锐钛型和金红石型纳米TiO2作为催化剂，研究了各种因素对酸性品红超声降解反应的影响。结果表明在锐钛型纳米TiO2作用下超声降解酸性品红的效果明显优于金红石型纳米TiO2。超声波频率25kHz，输出功率50w，催化剂用量500mg／L，pH为3．0，酸性品红水溶液初始浓度10mg／L，的条件下，60min左右降解率即可达到80％以上，180min酸性品红基本可全部降解，COD的去除率也可达到了99．0％。因此，锐钛型纳米TiO2催化超声降解有机污染物的方法具有很好的应用前景。

Study on Ultrasonic Degradation of Acid Fuchsine Using Nano TiO2 Catalyst

Effects of various factors on ultrasonic degradation of acid fuchsine using high-heat treated industrial nano TiO2 were studied. The results indicate that the effectiveness of ultrasonic degradation is more obvious with anatase nano TiO2 than that with rutile nano TiO2. Under conditions of ultrasound frequency of 25 kHz, power out put of 50W, catalyst amount of 500mg/L, pH=3.0 and initial concentration of 10mg/L, the degradation rate of acid fuchsine can get to 80% in 60 min, and be close to 100 percent in 180 min, and elimination rate of COD is close to 99%. Therefore, ultrasonic degradation of organic pollutants by TiO2 catalyst has better prospects.