摘要
以乙二醇和水为溶剂，在170℃用水热法合成多面体Y1-xDyxVO4（0≤x≤0．1）纳米晶。用X射线衍射（XRD）、透射电镜（TEM）和光致发光（PL）等手段对产品的结构和性能进行分析和表征。研究结果表明：多面体Y1-xDyxVO4纳米晶均为单晶结构，其颗粒粒径为20～200nm；PL光谱显示，随着退火温度的提高，多面体Y1-xDyxVO4纳米晶具有比不规则Y1-xDyxVO4纳米颗粒更好的荧光性和较好的晶化度，但产品的Y／B（黄光强度与蓝光强度的比值）和色纯度下降。
Y1-xDyxVO4 （0≤x≤0.1） nanocrystals with the morphology of polyhedron were synthesized via a hydrothermal route in glycol-water mixtures at 170 ℃. The structures and optical properties of the as-prepared samples were investigated using X-ray diffraction, transmission electron microscopy and photoluminescence spectroscopy. The results show that these polyhedrons with average particle size of 20 to 100 nm represent typicle single crystal structures. The photoluminescence （PL） measurements reveal that polyhedron Y1-xDyxVO4 crystals exhibit improved fluorescence intensity and crystallization derived from the perfect crystal structure of polyhedron annealed at higher temperature in contrast with the irregular nanoparticles, but the ratio of yellow （4F9/2 →6H13/2） to blue （4F9/2 →6H15/2） emissions and chromaticity of the as-obtained samples decrease with the increase of the anneal temperature.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2009年第3期663-669,共7页
Journal of Central South University:Science and Technology
基金
国家高技术研究发展计划项目(2002AA302606)
湖南省自然科学基金资助项目(08JJ3104)
广西教育厅基金资助项目(200608MS024)
广西青年基金资助项目(0728107)
