摘要
用超声波辅助法制备了CeF3纳米晶.并用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线粉末衍射(XRD)、紫外吸收(UV)光谱和荧光光谱(PL)对纳米晶的结构与性能进行了表征.结果表明:超声时间对所制备的CeF3纳米晶的形貌有很大的影响.随着超声时间的延长,所制备样品的形貌由"笼形"演变为规整的盘形.随着样品粒径的减小,纳米晶的紫外吸收峰和吸收带边发生明显的蓝移.纳米晶的荧光强度与纳米晶的结晶程度有关.
CeF3 nanocrystals were successfully synthesized via ultrasound assisted route, which were characterized by scanning electron microscope （SEM） , transmission electron microscope （TEM） , powder X-ray diffraction （XRD）, ultraviolet （UV） spectroscope and photoluminescence spectrophotometer （PL）. The results show that the shape and size of products are strongly depended on the ultrasonic time. With the increment of the ultrasonic time, the morphology of the CeF3 nanoerystals changes from ＂lantern＂ particles to uniform disk-like particles. The UV absorption peak and the band-edge of the CeF3 nanocrystals exhibit a pronounced blue shift as the size of the particles decreasing, the PL intensity of CeF3 nanocryStals is related to the crystalline extent.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2009年第3期549-552,共4页
Journal of Inorganic Materials
基金
国家自然科学基金(20671029)
河南省杰出青年基金(0612002900)
关键词
超声辅助
氟化铈纳米晶
表征
超声时间
ultrasonic-assisted
cerium fluoride nanocrystalline
characterization
ultrasonic time
