发光学报, 2012, 33 (3): 263, 网络出版: 2012-03-17
花状Bi2WO6∶Er3+纳米球的纯绿色上转换荧光和增强的光催化活性
Pure Green Upconversion Luminescence and Enhanced Photocatalytic Activity of Flower-like Hierarchical Bi2WO6∶Er3+ Microspheres
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。
Abstract
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.
范乃英, 侯海鸽, 冯清茂, 李莹, 陈亚杰, 赵彬彬, 王国凤. 花状Bi2WO6∶Er3+纳米球的纯绿色上转换荧光和增强的光催化活性[J]. 发光学报, 2012, 33(3): 263. FAN Nai-ying, HOU Hai-ge, FENG Qing-mao, LI Ying, CHEN Ya-jie, ZHAO Bin-bin, WANG Guo-feng. Pure Green Upconversion Luminescence and Enhanced Photocatalytic Activity of Flower-like Hierarchical Bi2WO6∶Er3+ Microspheres[J]. Chinese Journal of Luminescence, 2012, 33(3): 263.
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