花状Bi_2WO_6∶Er^(3+)纳米球的纯绿色上转换荧光和增强的光催化活性(英文)  

Pure Green Upconversion Luminescence and Enhanced Photocatalytic Activity of Flower-like Hierarchical Bi_2 WO_6∶Er^(3+) Microspheres

作　　者：范乃英[1] 侯海鸽[1] 冯清茂[1] 李莹[1] 陈亚杰[1] 赵彬彬[1] 王国凤[1] 

机构地区：[1]黑龙江大学化学化工与材料学院功能无机材料化学省部共建教育部重点实验室,黑龙江哈尔滨150080

出　　处：《发光学报》2012年第3期263-268,共6页Chinese Journal of Luminescence

基　　金：国家自然科学基金(10979032,21171052);教育部新世纪优秀人才支持计划(NCET-11-0959);黑龙江大学杰出青年科学基金;黑龙江省博士后基金资助项目

摘　　要：用水热法合成了花状Bi2WO6和Bi2WO6∶Er3+球型微粒样品。Bi2WO6∶Er3+微粒在980 nm光激发下发射纯绿色上转换荧光,退火温度和Er3+的掺杂量对Er3+的光谱形状没有明显的影响。Bi2WO6∶Er3+除了具有上述发光性质外,在可见光照射下还存在很高的光催化活性。实验证明:Bi2WO6和Bi2WO6∶Er3+对罗丹明B的光降解效率分别达到68.9%和95.3%,Er3+离子的掺杂提高了罗丹明B的吸附量以及Bi2WO6∶Er3+光催化活性。Flower-like hierarchical Bi2WO6 and Bi2WO6∶Er3＋ microspheres were synthesized by a hydrothermal method.Bi2WO6∶Er3＋ microspheres exhibited pure green upconversion lumminescence（2H11/2/4S3/2→4I15/2） under 980 nm excitation.The annealing temperature as well as Er3＋-doped content had not evident influence on the spectrum shape of Er3＋.Bi2WO6∶Er3＋,in addition to the aforementioned luminescence properties,also showed high photocatalytic activity for the degradation of RhB under visible light irradiation.The photodegradation efficiency of RhB reached 68.9% and 95.3% for Bi2WO6 and Bi2WO6∶Er3＋,respectively.The enhancement of photocatalytic activity would be related to the both the larger RhB adsorbance and the visible-to-ultraviolet upconversion of Er3＋ ions.

关 键 词：ER3+ 发光 催化活性 

分 类 号：O482.31[理学—固体物理]