Sol-gel synthesis and photoluminescence characterization of La_2Ti_2O_7:Eu^(3+) nanocrystals  

作　　者：CHENG Hua LU Zhouguang LIU Ying YANG Haihua GU Yingying LI Wei TANG Yougen 

机构地区：[1]College of Chemistry ＆ Chemical Engineering, Central South University, Changsha 410083, China

出　　处：《Rare Metals》2011年第6期602-606,共5页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (No.50972166)

摘　　要：Eu3＋ doped La2Ti2O7 nanocrystals with pure monoclinic phase and size of about 100 nm were prepared by a citric acid （CA） assisted sol-gel method. Techniques of thermo-gravimetric （TG） and differential scanning calorimetry （DSC）, X-ray diffraction （XRD）, as well as transmission electron microscopy （TEM） were employed to characterize the as-synthesized nanoparticles. Furthermore, photoluminescence （PL） performances of the Eu3＋ doped La2Ti2O7 nanocrystals were evaluated with focus on the effects of calcination temperature and Eu3＋ doping concentration on the photoluminescence properties.Eu3＋ doped La2Ti2O7 nanocrystals with pure monoclinic phase and size of about 100 nm were prepared by a citric acid （CA） assisted sol-gel method. Techniques of thermo-gravimetric （TG） and differential scanning calorimetry （DSC）, X-ray diffraction （XRD）, as well as transmission electron microscopy （TEM） were employed to characterize the as-synthesized nanoparticles. Furthermore, photoluminescence （PL） performances of the Eu3＋ doped La2Ti2O7 nanocrystals were evaluated with focus on the effects of calcination temperature and Eu3＋ doping concentration on the photoluminescence properties.

关 键 词：lanthanum titanate rare earth metals PHOTOLUMINESCENCE NANOPHOSPHORS pechini citric acid sol-gel 

分 类 号：TQ426.81[化学工程] O484.41[理学—固体物理]