%0 Journal Article
%T Preparation of Nanometer TiO2 Doped with Upconversion Luminescence Agent and Investigation on Degradation of Ethyl Violet Using Visible Light<br>上转换发光剂掺杂纳米TiO2的制备及可见光降解乙基紫的研究
%A WANG Jun
%A WEN Fu-yu
%A ZHANG Zhao-hong
%A ZHANG Xiang-dong
%A PAN Zhijun
%A HANG Guan
%A ZHAO Gang
%A KANG Ping-li
%A ZHANG Peng
%A <br>王君
%A 温福宇
%A 张朝红
%A 张向东
%A 潘志军
%A 张冠
%A 赵刚
%A 康平利
%A 张鹏
%J 环境科学
%D 2006
%I 
%X A novel upconversion luminescence agent 40CdF2·60BaF2·1.6Er2O2 was synthesized and the fluorescent spectrum was determined.This upconversion luminescence agent can emit five upconversion fluorescent peaks whose wavelengths are all below 387nm under the excitation of 488 nm visible light.This upconversion luminescence agent was mixed into nanometer TiO2 powder by ultrasonic dispersion and the doped nanometer TiO2 photocatalyst utilizing visible light was prepared.The doped TiO2 powder was charactered by XRD and TEM and its photocatalytic activity was checked through the photocatalytic degradation of ethyl violet dye as a model compound under the visible light irradiation emitted by three basic color lamp.Otherwise,in order to compare the photocatalytic activities the same experiment was carried out for undoped photocatalytic TiO2 powder.The degradation ratio of ethyl violet dye in the presence of doped nanometer TiO2 powder reached 99.68% under visible light irradiation at 12.0 h which was obviously higher than the corresponding degradation ratio in the presence of undoped nanometer TiO2 powder,which indicate that the upconversion luminescence agent prepared as dopant can effectively turn visible lights to ultraviolet lights which are absorbed by nanometer TiO2 particles and produce the electron-cavity pairs.
%K upconversion luminescence agent
%K doped nanometer TiO2
%K photocatalytic degradation
%K visible light
%K ethyl violet<br>上转换发光剂
%K 掺杂纳米TiO2
%K 光降解
%K 可见光
%K 乙基紫
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=5BA55E5D4CF23E6E&yid=37904DC365DD7266&vid=DB817633AA4F79B9&iid=B31275AF3241DB2D&sid=6DAA05ECA4CD5075&eid=BAEC9CADFE1F0CCC&journal_id=0250-3301&journal_name=环境科学&referenced_num=1&reference_num=19