摘要
采用KOH-水热的方法制备出方块形纳米级Gd2O3∶Sm,并测定了它的光谱,研究了焙烧温度对发光强度的影响,结果表明,热处理对颗粒的形状影响较小,甚至800℃焙烧仍然能得到尺寸在50 nm^100 nm的纳米方块。样品在569 nm、574 nm、584 nm,598 nm、606 nm、615 nm、621 nm,655 nm、668 nm处有发射峰,分别归属于4G5/2—6H5/2,4G5/2—6H7/2,4G5/2—6H9/2;其中,位于606 nm处4G5/2—6H7/2跃迁最强,样品发射出明亮的橙色光,400℃焙烧得到的样品其发光强度明显弱于800℃焙烧得到的样品。
In this paper, Gd2O3： Sm nanocubes have been prepared using KOH as precipitant via hydrothermal method. The heat treatment （more than 600 ℃ ） can induce the formation of Gd2O3 ：Sm nanocubes. The TEM images showed that the heat treatment has little effect on the morphology of the samples. Even the calcinations temperature increased to 800 ℃, the sample still kept nanocube morphology with size distribution of 50-100 nm. The luminescent results indicated that there were three sharp peaks at 569 mn ,574 mn ,584 nm ;598 mn ,606 mn ,615 mn ,621 mn and 655 mn ,668 nm, which corresponded to 4Gs/2-6Hs/2 ,4Gs/z-6H7/2 and 4Gs/z-6Hg/2 respectively. Among these peaks, the transition of 4Gs/2-6H7/2 （606 nm） was domina- ted, which thus suggested the samples could emit orange light. In addition, since there were a few of GdOOH in the sample calcined at 400℃, its luminescent intensity is much lower than that of the sample calcined at 800 ℃.
出处
《稀土》
EI
CAS
CSCD
北大核心
2013年第5期6-10,共5页
Chinese Rare Earths
基金
国家自然科学基金项目资助(51102201)
厦门市科技局杰出青年项目
厦门理工学院高层次人才引进启动项目
中国科学院百人计划项目
