铒掺杂二氧化钛纳米制备及上转换性能研究  

Preparation and up-conversion luminescence of Er^(3+) doped TiO_2 synthesized

作　　者：俞泽民[1] 侯俊[1] 范叶霞[1] 夏霏霏[1] 夏士兴[2] 

机构地区：[1]哈尔滨理工大学材料科学与工程学院,哈尔滨150080 [2]哈尔滨工业大学化工学院,哈尔滨150001

出　　处：《哈尔滨商业大学学报（自然科学版）》2012年第1期102-105,114,共5页Journal of Harbin University of Commerce：Natural Sciences Edition

基　　金：哈尔滨市科技(攻关)计划项目(2008AA2CG149)

摘　　要：以溶胶-凝胶法制备了掺Er3+的TiO2上转换发光纳米粉,通过XRD、SEM、上转换荧光发光谱等测试,对不同物质的量百分比Er3+掺杂和热处理温度的TiO2纳米粉进行了上转换性能研究,并对其发光机理进行了分析.结果表明,适量Er3+物质的量百分比及适当热处理温度有利于增强TiO2纳米粉的上转换发光性能.Er3+:TiO2粉体在980 nm激发下在539～567 nm范围获得绿光、在669 nm处获得红光.随着Er3+的物质的量百分比增加,绿光增强,红光减弱(小于1%);物质的量百分比继续增加,绿、红光均弱.随着焙烧温度的升高,绿光增强,红光减弱.当Er3+掺杂物质的量百分比为1%;焙烧温度为800℃时,获得的绿光强度较高、色彩单一.The Er3＋ doped TiO2 upconversion luminescence nano-powders were prepared by sol-gel method,being characterized by XRD,SEM,emission spectroscopy.Upconversion nano-powders luminescent mechanism and different concentration Er3＋ doped and heat treatment temperature on TiO2 up-conversion fluorescence were analyzed.The results indicated that moderate Er3＋ concentration and appropriate heat treatment temperature were good for increasing TiO2 nano-powders upconversion capability.Er3＋ doped TiO2 powders were excited by 980 nm infrared spectrum,gained green light beyond 539~567 nm,gained red light on 669 nm,and the intensity on green light was more than infrared.With the concentration of Er3＋ increasing,green light intensity was strengthening,and red light intensity was weakening（less than mole fraction 1%）;continuing to increase the concentrations,green and red lights were relatively weak.With heat treatment temperature increasing,green light intensity was strengthening,and red light intensity was weakening.When the Er3＋ doping density was 1mol%,and roasting temperature was 800 ℃,the intensity green light obtained was higher and the color was unitary.

关 键 词：二氧化钛 纳米粉 溶胶-凝胶法 上转换发光 

分 类 号：O643[理学—物理化学]