• 关键词：上转光剂  掺杂纳米TiO₂  可见光降解  反应艳蓝KN-R

• 基金项目：国家自然科学基金资助课题(No.20371023);辽宁省教育厅自然科学基金项目(No.2004C018)

• 王君
• 辽宁大学化学系, 沈阳 110036

• 赵刚
• 辽宁大学化学系, 沈阳 110036

• 张朝红
• 辽宁大学环境系, 沈阳 110036

• 张向东
• 辽宁大学化学系, 沈阳 110036

• 张冠
• 辽宁大学化学系, 沈阳 110036

• 温福宇
• 辽宁大学化学系, 沈阳 110036

• 潘志军
• 辽宁大学化学系, 沈阳 110036

• 张鹏
• 辽宁大学化学系, 沈阳 110036

• 摘要：合成了一种新型含有稀土金属Er的上转光剂,40CdF₂·60BaF₂·0.8Er₂O₃,此上转光剂在488nm可见光的激发下,产生了5个波长均小于387nm的上转换紫外发射峰.采用超声波分散的方法制备出了上转光剂掺杂的纳米TiO₂可见光光催化剂.采用X射线衍射(XRD)及透射电镜(TEM)对催化剂进行了表征.以反应艳蓝KNR为研究对象,研究了在(三基色灯下发出的)可见光的照射下该可见光光催化剂的催

• Abstract：A novel upconversion luminescence agent, 40CdF₂·60BaF₂·0.8Er₂O₃, 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 488nm visible light. This upconversion luminescence agent was mixed in nanometer rutile TiO₂ powder by ultrasonic dispersion and the new 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 reactive deep blue KN-R 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 reactive deep blue KN-R in the presence of doped nanometer TiO₂ powder reached 74.30 % under visible light irradiation at 50 h which was obviously higher than the corresponding 23.10 % 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.

• Key words：upconversion luminescence agent  doped nano TiO₂  visible light degradation  reactive deep blue

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