用离子液前驱体合成高荧光性能的ZnO和CdS纳米材料  

Highly luminescent ZnO and CdS nanostructures prepared by ionic liquid precursors

作　　者：陶磊明[1] 许红涛[1] 安艳清[1] 杜祖亮[1] 武四新[1] 

机构地区：[1]河南大学特种功能材料教育部重点实验室,开封475004

出　　处：《中国科学（B辑）》2009年第5期412-419,共8页Science in China(Series B)

基　　金：国家自然科学基金(批准号:20871041);教育部科学技术研究重点项目(批准号:208086)资助

摘　　要：合成了含Cd和Zn的离子液，使其提供金属离子，与Na2S反应制备离子液包裹的半导体纳米材料．X射线衍射和透射电子显微镜分析结果显示：在Cd离子液与Na2S反应中，得到的是尺寸在5～6nm、离子液包裹CdS纳米晶，而在Zn的体系中，最终产物为尺寸在1μm左右六方盘形貌的ZnO颗粒．用热力学和结晶动力学详细讨论了造成Cd和Zn体系在反应条件相同时，产物的形貌和结构差别的原因．荧光性质的测试结果表明：该方法制备的ZnO和CdS纳米粒子具有很好的荧光性能．In this paper, the ionic liquids containing Cd and Zn are synthesized, which serve as metal-chalcogenides precursors, and react with Na2S to synthesize the ionic-liquid-capped semiconductors. The products are detected by XRD and TEM. The results demonstrate that the CdS is composed of 5-6 nm monodispersed nanocrystals. At the same time, the ZnO composed of 1 μm hexagonal-disk nanostructure is prepared under the same experimental condition. The difference of the morphology and structures between Zn and Cd systems is discussed by thermodynamics and crystallography. The fluorescence of as-prepared ZnO and CdS shows excellent photoluminescence.

关 键 词：离子液 氧化锌 硫化镉 

分 类 号：TB383.1[一般工业技术—材料科学与工程]