S掺杂纳米TiO_2对电子结构及光催化活性影响的研究  

Study on Influence of S-doping on Electronic Structure and Photocatalytic Activity of Nano TiO_2

作　　者：王旭红[1,2] 马冠云[1,2] 孙悦[1] 张尧[1] 

机构地区：[1]常熟理工学院化学与材料工程学院,常熟215500 [2]常州大学石油化工学院,常州213164

出　　处：《材料导报》2014年第16期19-22,共4页Materials Reports

基　　金：江苏省自然科学基金(BK2007704)重点资助项目

摘　　要：以钛酸丁酯为前驱体,硫脲为掺杂离子给体,通过溶胶-凝胶法制备了硫掺杂纳米TiO2粉体,并进行了XRD、BET、TG、UV-vis表征和分析,结果表明:硫脲掺杂出现了锐钛矿型TiO2,随着硫脲添加量的增加,锐钛矿相微晶强度降低,晶粒尺寸、晶胞体积增大,比表面积降低。光催化降解双酚A结果表明,当硫脲与钛酸丁酯物质的量比n(S)/n(Ti)为2时,经500℃热处理的催化剂的光催化活性最佳,当n(S)/n(Ti)为0.1时,样品光催化活性最好。S-doped nano TiO2 photocatalyst were synthesized through sol-gel method with tetra-n-butyl tita- nate as precursor, thiourea as proton donor. The catalyst was analyzed and characterized by XRD, BET, TG, UV-vis, the results showed that： the doping of thiourea emergenced anatase TiO2, anatase crystallites strength weakened with the increase of thiourea, crystallite size and cell volume increased, the specific surface area decreased. The results of photocatalytic degradation hisphenol A show that when S/Ti molar ratio is 2, the catalyst through thermal treat- ment at 500 ℃ exhibits the best photocatalytic activity. The sample exhibits the best photocatalytic activity when the molar ratio of thiourea was 0. 1.

关 键 词：溶胶-凝胶法 硫掺杂 纳米TIO2 光催化活性 

分 类 号：O643[理学—物理化学]