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Ag-catalyzed Synthesis of Tb(BO2)3 Nanorods
杨兰, 周立群*, 黄莹, 唐子威
Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules and College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
Abstract:
Well-crystallized with excellent luminescent properties, Tb(BO2)3 nanorods were first suc-cessfully synthesized by a simple solid-state method with Ag as catalyst. The result of X-ray diffraction showed that the Tb(BO2)3 nanorods could be well-crystallized at 700 oC. As-prepared straight nanorods of Tb(BO2)3 had the typical diameters in the range of 100-200 nm, the thickness of 30-50 nm and the lengths up to 3 μm by transmission elec-tron microscopy and the corresponding selected area electron diffraction indicated that the nanorod calcined at 700 oC was single-crystalline. Based on the fact that Ag nanoparti-cles attached to the tips and middles of the Tb(BO2)3 nanorods, a growth model of the Tb(BO2)3 nanorods was proposed. Photoluminescence spectra under excitation at 369 nm showed that these Tb(BO2)3 phosphors had a green emission at 546 nm, which is ascribed to 5D47F5 transition. The effect of calcining temperature on the structures, morphologies, and luminescent properties of Tb(BO2)3 phosphors were studied.
Key words:  Crystal growth, Growth from vapor, Nanostructure, Phosphor
FundProject:
银催化合成Tb(BO2)3纳米棒
Lan Yang, Li-qun Zhou*, Ying Huang, Zi-wei Tang
湖北大学有机功能分子合成与应用教育部重点实验室,武汉430062
摘要:
采用固相反应银作催化剂成功合成出棒状结构的稀土硼酸盐Tb(BO2)3发光材料. 利用X射线衍射和区域电子衍射研究了产物的结构特性,在700 oC煅烧时,Tb(BO2)3纳米棒具有良好晶形. 透射电镜分析表明,Tb(BO2)3纳米棒直径为100~200 nm,厚度为30~50 nm,长约3 μm. 基于Ag纳米颗粒附在Tb(BO2)3纳米棒的顶端和中部的事实,探讨了Tb(BO2)3纳米棒的生长机理. 荧光光谱研究表明,在369 nm紫外光激发下,Tb(BO2)3能发出Tb3+的特征绿色荧光,发射主峰位于546 nm,归属于5D47F5跃迁. 同时,也探讨了煅烧温度对产物的结构、形貌以及发光性质的影响.
关键词:  晶体生长,气相生长,纳米结构,荧光粉
DOI:10.1088/1674-0068/23/06/713-718
分类号: