可见光诱导型含硒离子源掺杂的纳米TiO_2的可控制备及光催化性能研究  

Controlled preparation and photocatalytic properties of visible light induced SeO_3^(2-) ion sources-doped-TiO_2 nanocomposites

作　　者：李月生[1] 孙绍发[1] 赵龙[1,2] 

机构地区：[1]湖北科技学院非动力核技术湖北省协同创新中心,湖北咸宁437100 [2]上海交通大学核科学与工程学院,上海200240

出　　处：《功能材料》2014年第19期19098-19108,19114,共12页Journal of Functional Materials

基　　金：国家重点基础研究发展计划(973计划)资助项目(2009CB939705);国家自然科学基金青年科学基金资助项目(11405050);湖北省教育厅重点资助项目(D20142804);国家级大学生创业训练和创业实践资助项目(201210927033;20131092723);湖北科技学院专项基金资助项目(ZX1022;ZX1102;ZX1203)

摘　　要：采用溶胶-凝胶法,以钛酸丁酯为钛源,分别以三乙醇胺和亚氨基二乙酸为水解抑制剂,合成了掺杂SeO2-3离子源不同含量的纳米TiO2,并在可见光范围内对孔雀石绿(MG)进行光催化活性评价。结果表明,SeO2-3离子源掺杂能够有效地提高纳米TiO2的光催化性能,并且确定了不同条件下合成的纳米TiO2的最佳掺杂含量和反应条件。对掺杂的TiO2进行了紫外-可见漫反射光谱(UV-Vis-DRS)、傅里叶变换红外(IR)、X射线粉末衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)、光电子能谱(XPS)以及氮物理等温吸附(BET)等系列表征,揭示了催化剂的表面性能、电子结构、脱水性能、吸附性能、结晶程度、晶相结构等多方面协同作用是SeO2-3离子源掺杂的TiO2具有最高的光催化活性的原因,该研究可能为新型高性能光催化材料的发展提供理论基础与应用支撑。In this thesis,nano TiO 2 of different SeO 2 -3 sources doping concentration were fabricated by sol-gel method using butyl titanate as titanata source and triethanolamine or iminodiacetic acid as different hydrolysis inhibitors.During evaluate on the photocatalysis activity of these SeO 2 -3 ion sources doped-TiO 2 under visible light,we found that the photocatalytic activity of nano TiO 2 can be enhanced by SeO 2 -3 source doped ,and we determined the SeO 2 -3 doping contents and reaction conditions in which the synthesized TiO 2 had the highest photocatalysis activities.The resulting photocatalysts were characterized by UV-Vis,FT-IR,XRD,SEM,TEM, XPS and BET.To sum up,the modified surface property,electronic structures,dehydrated properties,absorp-tion properties,degree of crystallinity and crystalline structures caused synergetic contributions leading to the extraordinary activity of the SeO 2 -3 -doped -TiO 2 .This results can provide a theoretical basis and supporting for the development of new high-performance photocatalytic materials.

关 键 词：SEO 2 -3 离子源 纳米 TiO2 掺杂 水解抑制剂 溶胶-凝胶法 

分 类 号：O643.3[理学—物理化学]