SnO2纳米粒子的溶剂热制备及光致发光性质  

Solvothermal Synthesis and Photoluminescence of SnO_2 Nanoparticles

作　　者：赵娜[1] 李大光[1,2] 赵丰华[1] 李铁虎[2] 

机构地区：[1]广东工业大学轻工化工学院,广东广州510006 [2]西北工业大学材料科学与工程学院,陕西西安710074

出　　处：《精细化工》2008年第12期1163-1167,共5页Fine Chemicals

基　　金：广东省科委重大工业攻关资助项目(045040037);广东省自然科学基金团队资助项目(04205301)~~

摘　　要：以SnCl4·5H2O为原料,乙二胺为溶剂,用溶剂热法在180℃合成了SnO2纳米粒子,用XRD和TEM对其结构和形貌进行了表征,对SnO2纳米粒子的红外谱图、漫反射谱图以及光致发光性能进行了分析,探讨了乙二胺辅助合成SnO2纳米粒子的化学原理和生长机制。结果表明,用乙二胺辅助成长法合成的SnO2纳米粒子的粒径在40nm左右,粒径分布均匀,分散性较好。SnO2纳米粒子光致发光在340、432和672nm处有3个强峰,在472和540nm处有2个弱峰,其中340nm处的峰为紫外近带边激子发射峰,432、472和540nm处的峰是由氧缺陷引起的,672nm处的峰归因于表面态的氧缺陷引起的能带中深能级跃迁。SnO2 nanoparticles were synthesized at 180 ℃ using SnCl4·5H2O as the starting material and ethylenediamine as solvent. The synthesized products were characterized by XRD, TEM, IR, diffuse reflectance spectrum and room-temperature photoluminescence （PL） spectrum. Chemistry and growth mechanisms of SnO2 nanoparticles by ethylenediamine-assisted synthesis were discussed. The SnO2 nanoparticles by hydrothermal synthesis in the presence of organic amines are spherical with uniform size distribution. The fluorescence spectrum of SnO2 nanoparticles shows that there are three strong emission peaks at 340,432 and 672 nm and two weak emission peaks at 472 nm and 540 nm. The PL peak at 340 nm can be attributed to ultraviolet exciton emission near band edge. The other peaks observed at 432,472 nm and 540 nm are assigned to oxygen vacancies. The red emission at 672 nm arises from transitions coming from deep level bandgap due to surface states associated with oxygen vacancies.

关 键 词：二氧化锡 纳米粒子 乙二胺 光致发光 功能材料 

分 类 号：TB383[一般工业技术—材料科学与工程]