Rapid Microwave-assisted Hydrothermal Synthesis of SrWO4：Eu^3＋ Nanowires and Their Luminescence Properties  

作　　者：LU Yang YANG Min YANG Bin LIU Wei ZHANG Hongdan ZHAO Xudong LIU Xiaoyang 

机构地区：[1]State Key Laboratory of lnorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130012, P. R. China [2]School of Materials Science and Engineering, Anhui University of Technology, Maanshan 243002, P. R. China

出　　处：《Chemical Research in Chinese Universities》2015年第2期175-178,共4页高等学校化学研究（英文版）

基　　金：Supported by the National Natural Science Foundation of China（Nos.21271082, 21371068） and the China Postdoctoral Science Foundation（No. 801141080411）.

摘　　要：SrWO4：Eu^3＋ nanowires were synthesized at 160 ℃ within 10 min via a microwave-assisted hydrothermal method. In examining the influences of synthesis temperature and reaction time on the morphology of nanowires, it was found that any temperatures and reaction time except 160 ℃ and 10 min gave rise to poorer morphologies under otherwise equal conditions. The synthesized nanowires were characterized by means of X-ray diffraction（XRD）, scanning electron microscopy（SEM）, transmission electron microscopy（TEM）, high-resolution transmission electron microscopy（HRTEM）, energy dispersive X-ray（EDX） and Raman spectrometry, respectively. The results suggest that the samples are homogenous and dispersive single phase nanowires. The photoluminescence properties of the nanowires were determined with a spectrofluorometer. Two obviously sharp peaks at 395 and 464 nm and a broad peak centered at 290 nm were found in their excitation spectrum. Under excitation at 395 and 464 nm, the ^5D0→^7F2 transition is the dominant process which means Eu^3＋ ion is located at a low symmetry site, while the ^5D0→^7F2 transition dominates under the excitation at 290 nm, showing a highly symmetric field around the Eu^3＋ ion, which indicates the presence of the two local Eu^3＋ environments.SrWO4：Eu^3＋ nanowires were synthesized at 160 ℃ within 10 min via a microwave-assisted hydrothermal method. In examining the influences of synthesis temperature and reaction time on the morphology of nanowires, it was found that any temperatures and reaction time except 160 ℃ and 10 min gave rise to poorer morphologies under otherwise equal conditions. The synthesized nanowires were characterized by means of X-ray diffraction（XRD）, scanning electron microscopy（SEM）, transmission electron microscopy（TEM）, high-resolution transmission electron microscopy（HRTEM）, energy dispersive X-ray（EDX） and Raman spectrometry, respectively. The results suggest that the samples are homogenous and dispersive single phase nanowires. The photoluminescence properties of the nanowires were determined with a spectrofluorometer. Two obviously sharp peaks at 395 and 464 nm and a broad peak centered at 290 nm were found in their excitation spectrum. Under excitation at 395 and 464 nm, the ^5D0→^7F2 transition is the dominant process which means Eu^3＋ ion is located at a low symmetry site, while the ^5D0→^7F2 transition dominates under the excitation at 290 nm, showing a highly symmetric field around the Eu^3＋ ion, which indicates the presence of the two local Eu^3＋ environments.

关 键 词：SrWO4：Eu^3＋ nanowire Microwave-assisted hydrothermal method Luminescence property 

分 类 号：TQ424.25[化学工程] TQ325.2