Templating Synthesis and Luminescent Properties of SrAl2O4: Eu, Dy Phosphor Derived from A Mesoporous Precursor
Long-lasting SrAl<,2>O<,4>: Eu, Dy phosphor was successfully prepared from a mesoporous precursor. The precursor was synthesized by templating method using nonionic Polyethylene Oxide (PEO) as surfactants, which was proved by TGDTG, X-Ray Diffraction (XRD) and Transmission Electron Microscopy (TEM) analysis. The analysis results indicated that regular cylindrical-to-hexagonal shaped pores with several nanometers were obtained. The structure and morphology of the SrAl<,2>O<,4>: Eu, Dy phosphor by templating method was characterized by XRD and Scanning Electron Microscopy (SEM). The XRD results showed that a pure SrAl<,2>O <,4> phase formed at 900℃ by templating method. The SEM morphologies of the obtained phosphors prepared by templating synthesis were uniform and porous muhicrystalline with average diameter size of 5μm. The broad-band UV-excited SrAl<,2>O<,4>: Eu, Dy phosphor derived from a mosoporous precursor was observed at λmax=515nm due to the transitions from the 4f<6>5d<1> to the 4f<7> configurations of Eu<2+> ion. The main excitation and emission intensitv of the phosphor with this method were stronger than that obtained by solid state reaction method. And the obtained long- lasting phosphor with this method revealed a better afterglow compared to the phosphor prepared through solid state reaction method.
long-lasting phosphor SrAl<,2>O<,4>: Eu, Dy templating synthesis mesoporous precursor rare earths
Yang Xuefeng(杨雪峰) Ning Guiling(宁桂玲) Pan Wen(潘文) Liu Hongyu(刘红宇) Lin Yuan(林源)
State Key Laboratory of Fine Chemicals and School of Chemical Engineering, Dalian University of Technology, Dalian 116012, China
国际会议
第五届国际稀土开发与应用研讨会(The Fifth International Conference on Rare Earth Decelopment and Applicatin)
包头
英文
321-325
2007-08-07（万方平台首次上网日期，不代表论文的发表时间）