掺Sn的纳米TiO_2表面光致电荷分离及光催化活性  

Surface Photoinduced Charge Separation and Photocatalytic Activity of Sn Doped TiO_2 Nanoparticles

作　　者：井立强[1,3] 付宏刚[1,3] 王德军[2] 魏霄[2] 孙家钟[1] 

机构地区：[1]吉林大学理论化学研究所,理论化学与计算国家重点实验室 [2]吉林大学化学学院,长春130023 [3]黑龙江大学化学化工与材料学院物理化学实验室

出　　处：《物理化学学报》2005年第4期378-382,共5页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金(20171016;20273027;20301006);中国博士后科学基金(20040350168);黑龙江省教育厅骨干教师创新能力资助计划(1054G035);黑龙江大学杰出青年基金(2003)资助项目~~

摘　　要：采用溶胶鄄凝胶法制备了不同掺Sn量的TiO2纳米粒子,主要利用表面光电压谱(SPS)和光致发光光谱(PL)对样品进行了表征,并通过光催化降解苯酚实验来评估样品活性.重点考察了热处理温度和掺Sn量对样品表面光生载流子的分离及光催化活性的影响,并探讨了Sn使TiO2纳米粒子改性的机制.结果表明,在适当温度处理下,适量Sn的掺入能够有效促进TiO2纳米粒子表面光生载流子的分离,以至于使其光催化活性得到显著提高.In this paper, different Sn doped TiO2 nanoparticles were prepared by a sol-gel method, and were mainly characterized by surface photovoltage spectrscopy(SPS) and photoluminescence spectroscopy (PL). The photocatalytic activity of the as-prepared samples was evaluated by degrading the phenol solution. The effects of the calcination temperature and doping Sn content on the separation of surface photoinduced charge carriers and photocatalytic activity of TiO2 nanoparticles were discussed, and the modification mechanisms of Sn were analysed. The results showed that the appropriate content of Sn dopant could effectively promote the separation of surface photoinduced charge carrier of TiO2 nanoparticles calcined at appropriate temperature, which was responsible for the remarkable increase in photocatalytic activity.

关 键 词：TIO2 溶胶-凝胶法 掺杂 SN 光催化 

分 类 号：O643.32[理学—物理化学]