摘要
采用水热法制备了Sm掺杂BaTiO3纳米粉体,并采用XRD、SEM、荧光分光光度计对其进行测试,研究了稀土元素Sm掺杂浓度对其相结构、微观形貌、光学性能的影响机制。结果表明:水热法制备BaTiO3纳米粉体具有良好的立方体状零维形貌,稀土元素Sm掺杂对BaTiO3纳米粉体形貌影响不大,在较低浓度的Sm掺杂时,Sm能够进入BaTiO3粉体的晶格,稀土掺杂元素Sm可以提供相关的电子跃迁能级,发射主峰位于408 nm、420 nm、464nm、485 nm荧光峰分别对应于Sm3+的f层电子的基态到激发态的能级跃迁,并且随着稀土元素Sm掺杂浓度的增加,Sm掺杂BaTiO3纳米粉体的荧光发光强度呈现出先增加后降低的趋势,这主要是由于稀土元素Sm掺杂浓度一定时,在BaTiO3晶格Sm3+与Sm3+间的相互作用增强,Sm3+与Sm3+之间的距离变小,致使一部分能量转移到猝灭中心,从而导致荧光发光强度降低。
Sm-doped BaTiO3 nanopowders were prepared by hydrothermal method.The morphology, composition and optical properties were studied by SEM,XRD and fluorescence spectroscopy.The results show that BaTiO3 nanopowders prepared by hydrothermal method have cubic zero-dimensional morphology. Sm doping has little influence on the structure and morphology of BaTiO3 nanopowders.The emission peaks at 408, 420,464 and 485 nm correspond to the energy level transition from ground state to excited state of f-layer electrons of Sm3+,respectively.The fluorescence intensity of Sm-doped BaTiO3 nano-powders increases and then decreases with the increase of Sm doping concentration. The main reason is that the interaction between Sm3+ and Sm3+ increases and the distance between Sm3+ and Sm3+ decreases with the increase of Sm doping concentration.As a result, part of the energy is transferred to the quenching center,which leads to the decrease of fluorescence intensity.
作者
王娇
刘少辉
赵利敏
郝好山
夏思怡
WANG Jiao;LIU Shaohui;ZHAO Limin;HAO Haoshan;XIA Siyi(School of Science,Henan Institute of Engineering,Zhengzhou 451191,China)
出处
《中国陶瓷》
CAS
CSCD
北大核心
2019年第11期36-40,共5页
China Ceramics
基金
河南省科技攻关计划项目（182102310895,192102210027）
国家自然科学基金（11847122）
作者简介
王娇,女,讲师。研究方向:功能材料。Email:wangjiao_1203@163.com。
