稀土掺杂的纳米TiO_2分散性及光学性能研究  

Preparation and Optical Study of Rare Earth Doped Titanium Oxides Nano Particles

作　　者：孙蕊[1] 陈思浩[2] 邢晨晨[1] 

机构地区：[1]上海工程技术大学材料工程学院,上海201620 [2]上海工程技术大学化学化工学院,上海201620

出　　处：《中国稀土学报》2011年第1期95-99,共5页Journal of the Chinese Society of Rare Earths

基　　金：上海市"科技创新行动计划"项目(0952nm02600);上海高校知识创新工程项目(JZ0904);上海工程技术大学研究生科研创新项目资助

摘　　要：采用溶胶凝胶法在同一条件下制备REn+∶Ti4+=0.02和0.10的稀土掺杂的纳米TiO2材料,其中REn+为Nd3+,Ce4+,La3+,Er3+四种稀土元素。通过TG-DTG,XRD,TEM,UV-Vis等测试方法对所制备的纳米TiO2进行焙烧温度、晶胞尺寸、晶粒形貌、谱学特性等方面的研究。研究表明,稀土掺杂的纳米TiO2径粒尺寸均在20 nm左右,少量稀土掺杂不但有利于TiO2颗粒的分散,而且有利于TiO2向金红石相转变。同时,由于表面修饰作用和晶场效应的影响,掺杂使纳米材料在可见光范围内有不同程度的"红移"现象,Ce4+掺杂的纳米TiO2在可见光的"红移"程度最强。稀土掺杂的纳米TiO2在农用膜和节能材料上可广泛运用。The sol-gel synthesis was used under the same preparation conditions for rare earth doped TiO2 nano particles.The ratio of REn＋ to Ti4＋ was 0.02 or 0.10（REn＋ was Nd3＋,Ce4＋,La3＋,Er3＋）.TG-DTG,XRD,TEM,UV-Vis was used to analysis the roast temperature,size,morphology,spectral characteristics and so on.It was shown that the average cell size of rare earth doped TiO2 nano particles were around 20 nm,and a little rare-earth doped titanium dioxide materials was of benefit not only to the dispersion,but also to the phase change into rutile.In addition,each sample of rare earth doped had distinctive characteristics in optical.In the range of visible light,they had ＂red shift＂ phenomenon,which was caused by different factors such as the surface effect,and the crystal field effect.The ＂red shift＂ of Ce4＋doped TiO2 nano particles was the strongest.The rare earth doped titanium oxides nano particles could be widely used in the agricultural and energy-saving materials.

关 键 词：稀土掺杂 纳米二氧化钛 溶胶凝胶法 光学性能 

分 类 号：O614.33[理学—无机化学]