掺硫改性TiO_2对活性艳红X-3B的光催化降解性能研究  

Study on photocatalytic degradation performance of reactive brilliant X-3B over S-doped titanium dioxide

作　　者：熊梅[1] 漆新华[1] 徐英钊[1] 谷文新[1] 庄源益[1] 

机构地区：[1]南开大学环境科学与工程学院,天津300071

出　　处：《环境工程学报》2010年第6期1208-1212,共5页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(20806041)

摘　　要：以硫脲为硫的源物质,以钛酸四丁酯为TiO2的前驱体,采用溶胶-凝胶法制备了掺硫改性TiO2光催化剂。以活性艳红X-3B为目标污染物,研究了该催化剂的光催化降解性能,对硫掺杂量、催化剂焙烧温度、溶液pH值以及催化剂添加量等影响因素进行了研究,并采用XRD分析手法对光催化剂进行表征。结果表明,经掺硫改性后的TiO2的催化活性有了很大提高,且硫的掺杂有一个最佳值,即Ti∶S的摩尔比为1∶1。经掺硫改性的TiO2在可见光区具备一定的催化活性,180 min内对活性艳红X-3B的去除率可达35.1%,且在紫外光区的催化活性优于纯TiO2。S-doped TiO2 was prepared with sol-gel method with thiourea as S source and tetrabutyl titanate as precursor of titanium dioxide.Reactive brilliant X-3B was used as model compound to study the photocatalytic degradation performance of the modified catalysts,including the effect of S-doped concentration,calcinations temperature,pH of solution and catalyst dosage.The catalysts were characterized by XRD techniques.The photocatalytic activity of the modified TiO2 was greatly improved,and there was an optimum value for the S-doped concentration at a mole ratio of 1∶1 for Ti∶S.The S-doped TiO2 was shown a fairy photocatalytic activity in visible region,a removal efficiency of 35.1% for X-3B was obtained at reaction time of 180 min.S-doped TiO2 exhibited higher activity than TiO2 in UV region.Abstract：-doped TiO2was prepared with sol-gelmethod with thiourea as S source and tetrabutyl titanate as precursor of titanium d ioxide.Reactive brilliantX-3B was used asmodel compound to study the photocatalytic degradation performance of the mod ified catalysts,includ ing the effect of S-doped concentration,calcinations temperature,pH of solution and catalyst dosage.The catalysts were characterized by XRD techniques.The pho-tocatalytic activity of the mod ified TiO2was greatly improved,and there was an optimum value for the S-doped concentration at a mole ratio of 1∶1 for Ti∶S.The S-doped TiO2was shown a fairy photocatalytic activity in visi-ble region,a removal efficiency of 35.1% forX-3B was obtained at reaction time of 180 m in.S-doped TiO2ex-hibited higher activity than TiO2in UV region.

关 键 词：TIO2 硫掺杂 可见光 活性艳红X-3B 

分 类 号：X703.1[环境科学与工程—环境工程]