发光学报2011，Vol.32Issue(5)：466-470,5.DOI:10.3788/fgxb20113205.0466
LaPO4:Eu3+@SiO2核壳结构发光纳米棒的制备与表征
Preparation and Characterization of LaPO4: Eu3 + @ SiO2 Core-shell Luminescent Naonrods
摘要
Abstract
LaPO4: Eu3+ luminescence nanorods were prepared via a hydrothermal method without any surfactants, then an uniform SiO2 layer was coated on the surface of LaPO4: Eu3+ nanorods by sol-gel method. At lasts LaPO4: Eu3+@ SiO2 core-shell structural luminescence nanorods were achieved. XRD patterns show that the uncoated and coated samples are all monclinic LaPO4 crystals. FTIR spectra indicate that LaPO4: Eu3+ is linked with SiO2 by chemical bond. TEM images reveal that the LaPO4: Eu3+ samples are one-dimensional nanorods with a diameter of 20 nm and a length of 300 ～ 500 nm. The coating thickness of SiO2 can be controlled by the concentration of TEOS. The results of photoluminescence properties show that the main emission peak of LaPO4: Eu3+ nanorods is near 591 nm, which is the characteristic orange red light corresponding to 5D0→7F1 transition of Eu3+ under 259 nm excitation. The PL intensity of the samples become weak with the increasing of the coating thickness, but the shape and the position of the peaks are not changed.关键词
LaPO4:Eu3+/纳米棒/核壳/包覆/发光材料Key words
LaPO4: Eu3+/ nanorods/ core-shell/ coating/ luminescence materials分类
数理科学引用本文复制引用
刘桂霞,李若兰,董相廷,王进贤..LaPO4:Eu3+@SiO2核壳结构发光纳米棒的制备与表征[J].发光学报,2011,32(5):466-470,5.基金项目
国家自然科学基金(51072026) （51072026）
吉林省科技发展计划(20090528)资助项目. （20090528）
