纳米TiO_2/PbWO_4可见光催化降解糖蜜酒精废水研究  

Visible photocatalysis dicomposition of molasses waste water over Nano TiO_2/PbWO_4 catalysts

作　　者：刘其海[1] 潘正现 

机构地区：[1]仲恺农业工程学院化学化工学院,广东广州510225 [2]广西壮族自治区环境保护科学研究院,广西南宁530022

出　　处：《仲恺农业工程学院学报》2010年第4期7-10,共4页Journal of Zhongkai University of Agriculture and Engineering

基　　金：仲恺农业工程学院校级科研基金(G3100026)资助项目

摘　　要：采用表面活性剂辅助分散沉淀法制备了不同TiO2含量的纳米TiO2/PbWO4复合氧化物可见光催化剂系列,在400 W汞灯模拟光源条件下,对糖蜜酒精废水的光催化降解性能进行了研究,并考察了TiO2质量分数、催化剂用量、空气流量及废水pH值对废水光降解脱色率的影响.结果显示,当TiO2含量为质量分数8%时,担载二氧化钛的钨酸铅(TiO2/PbWO4)催化剂光催化降解活性达到最佳,在TiO2/PbWO4用量为2 g/L、鼓泡空气流量为120 mL/min及废水pH值为1.7的条件下,光催化降解120 min时,废水的脱色率可达92.8%.Nano TiO2/PbWO4 complex metal oxide catalysts with various TiO2 content were prepared by the method of surfactant-assistant dispersion of deposition,and photocatalysis performance of the Nano TiO2/PbWO4 catalysts for the decomposition of molasses waste water was studied under the light of 400 W mercury lamp.The effect of TiO2 content of the TiO2/PbWO2 cataysts,the catalyst dosage,air flow rate and the pH value on the decolor of molasses waste water were investigated.The results showed that the TiO2/PbWO4 presented the most excellent when the TiO2 content was 8%,and as high as 92.8% of decolor rate could be obtained after the 120 min photocatalysis on the condition of caralyst dosage=2 g/L,air flow rate=120 mL/min and the pH=1.7.

关 键 词：纳米 二氧化钛钨酸铅(TiO2/PbWO4) 可见光催化 糖蜜废水 

分 类 号：TQ034[化学工程]