纳米TiO_2/沸石复合材料光催化降解苯酚的性能  

Photocatalytic degradation of phenol with nano-TiO_2/zeolite composite material

作　　者：胡小龙[1] 孙青[1] 徐春宏[1] 郑水林[1] 

机构地区：[1]中国矿业大学(北京)化学与环境工程学院,北京100083

出　　处：《化工进展》2016年第5期1519-1523,共5页Chemical Industry and Engineering Progress

摘　　要：苯酚是一种较难处理的有毒有机污染物。本文以Ti OSO_4为钛源,尿素为沉淀剂,沸石为载体,采用均匀沉淀法制备了纳米Ti O_2/沸石复合材料,并以苯酚作为降解对象,研究了不同Ti O_2负载量、煅烧温度以及重复使用对纳米Ti O_2/沸石复合材料的光催化降解苯酚性能的影响。结果表明:Ti O_2负载量为30%、煅烧晶化温度为650℃时,经300W高压汞灯照射3.5h,纳米Ti O_2/沸石复合材料对20mg/L苯酚溶液的光催化降解率达到91.6%;重复使用5次仍对苯酚溶液具有85%的光催化降解率。Phenol is a toxic organic pollutants and difficult to treat. Using Ti OSO_4 as titanium source,urea as the precipitator,and zeolite as the carrier,we had prepared the nano-Ti O_2/zeolite material by homogeneous precipitation method. The effect of Ti O_2 loading amount,calcination temperature and the reusabiity on photocatalytic degradation of phenol were investigated by taking phenol as the degradation target. The results showed that the nano-Ti O_2/zeolite material with 30% Ti O_2 loaded,and calcined at 650℃ exhibited the best photocatalytic performance. The degradation efficiency of nano-Ti O_2/zeolite material towards phenol（20mg/L） was 91.6% when irradiated for 3.5h under 300 W high pressure mercury lamp and the catalyst after five cycles still demonstrated excellent photocatalytic performance of 85 % of the photocatalytic degradation rate of phenol.

关 键 词：沸石 纳米二氧化钛 苯酚 催化作用 

分 类 号：TB332[一般工业技术—材料科学与工程]