纳米TiO_2催化超声降解技术在处理废水中的应用  

Technology of ultrasonic degradation with nanometer TiO_2 catalyst and its application to the treatment of wastewaters

作　　者：王君[1] 韩建涛[1] 佟键[1] 李莹[1] 郭宝东[1] 李红[1] 

机构地区：[1]辽宁大学化学系,辽宁沈阳110036

出　　处：《工业水处理》2004年第8期24-27,共4页Industrial Water Treatment

摘　　要：采用合成的纳米TiO2作为催化剂,以甲基橙超声降解反应为模型,研究了各种因素对TiO2催化超声降解的影响.研究结果表明,在纳米TiO2催化剂作用下超声降解甲基橙的效果非常明显.纳米TiO2催化剂用量在1.0～1.5g/L之间,超声波频率25 kHz,输出功率50 W,pH为3.0时,甲基橙水溶液初始质量浓度20 mg/L的条件下,通过分光光度法测定,80 min左右基本可全部降解,降解率为98.6%,COD的去除率达到了99.0%.因此,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.Various affecting factors of methyl orange in the presence of nanometer TiO2 powder prepared in laboratory on ultrasonic degradation have been studied. The results indicate the effects of ultrasonic degradation are more obvious in the presence of nanometer TiO2 catalyst in the acidic condition irradiated with the ultrasound of 25 kHz frequency and power output of 50 W for about 80 min and the ratio of degradation can get to 98.6% and COD removal rate reaches 99.0% too. Thereby the ultrasonic degradation of organic pollutants catalyzed by nano-meter TiO2 catalyst has better applicable prospect.

关 键 词：纳米TIO2 超声降解 甲基橙 

分 类 号：O611.4[理学—无机化学] X703[理学—化学]