镧系元素
材料科学
介孔材料
发光
兴奋剂
光致发光
纳米晶材料
分析化学(期刊)
化学工程
纳米技术
离子
化学
有机化学
光电子学
工程类
催化作用
作者
Chunfang Du,Fangfang Lang,Yiguo Su,Zhiliang Liu
标识
DOI:10.1016/j.jcis.2012.11.012
摘要
In this work, we report on the construction of lanthanide doped CaWO(4) mesoporous structure with efficiently luminescent properties. Using citric acid as the capping agent and SBA-15 as the nanocasting template, lanthanide doped CaWO(4) samples with mesostructure were successfully prepared at low temperature for the first time. The samples were carefully characterized by X-ray diffraction, transmission electron microscopy, N(2) adsorption-desorption, Fourier transform infrared spectroscopy, and luminescence spectra. It is found that the lanthanide doped CaWO(4) showed mesostructure with high specific surface area, large pore volume, and mesoporous pore size distribution. Photoluminescence measurements indicated that lanthanide doped CaWO(4) mesostructure exhibited highly efficient luminescent properties in comparison with conventional randomly deposited lanthanide doped CaWO(4) nanoparticles due to superior interparticle connectivity of mesostructures that can suppress the energy losses and reduce surface quenching centers. By altering lanthanide ions, mesoporous CaWO(4) showed multi-color emission such as green, red, and dark cyan under single-wavelength excitation.
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