材料科学与工程学报2018，Vol.36Issue(1)：35-40,6.DOI:10.14136/j.cnki.issn1673-2812.2018.01.008
焙烧温度对1.0wt％Sm-TiO2纳米粉体可见光催化活性的影响
Effect of Calcined Temperature on Visible Photocatalystic Activity of Nano-TiO2 Powders Doped 1.0wt％ Sm
摘要
Abstract
Nano-TiO2 powders with 1.0wt％Sm doping at different calcined temperature were prepared by a sol-gel method.The photocatalytic activity of Sm-TiO2 samples was investigated at different calcined temperatures by measuring the degradation rate of methylene blue (MB) under the irradiation of fluorescent lamp.The results show that calcined temperature has little effect on doping of Sm.Samarium exist as Sm3+ and Sm2+ two kinds of valence state on the surface of TiO2.Sm doping inhibited the phase transition from anatase to rutile and decreased the recombination of photogenerated electron-hole pairs.With the increment of calcination temperature,the grain size and rutile phase content of the samples increases.The samples calcined at 500℃ showed largest red shift of the absorption edge for the visible-light.The photocatalytic activity of the 1.0wt％Sm-TiO2 samples calcined at 500℃ is 96.86％ within 6 h under the irradiation of fluorescent light,which is significantly higher than 56.52 ％ of P25 produced by Degussa under the same experimental conditions.关键词
Sm掺杂/纳米TiO2/焙烧温度/光催化Key words
Sm-doping/nano-titanium dioxide/calcined temperature/photocatalysis分类
化学化工引用本文复制引用
彭富昌,李亮,崔晏,高洪林,柳清菊..焙烧温度对1.0wt％Sm-TiO2纳米粉体可见光催化活性的影响[J].材料科学与工程学报,2018,36(1):35-40,6.基金项目
国家自然科学基金资助项目(51262030),四川省教育厅自然科学基金资助项目(17ZB0227),云南省微纳材料与技术重点实验室开放基金资助项目(KF2015005) （51262030）
