CdSe水溶性量子点的制备及性能研究  

Preparation and Characterization of Water-soluble CdSe Quantum Dots

作　　者：王晓敏 王素敏[2] 郭浩[2] 黄夏群 

机构地区：[1]中国建材检测认证集团西安有限公司,西安710061 [2]西安工业大学材料与化工学院,西安710021

出　　处：《西安工业大学学报》2015年第2期147-151,共5页Journal of Xi’an Technological University

基　　金：陕西省教育厅科学研究计划项目(11JK0800)

摘　　要：为了解决合成CdSe量子点的方法多、反应条件苛刻、合成成本高、毒性大且产物不溶于水等问题,提出了一种温和的方法制备水溶性CdSe量子点.以硒代硫酸钠为前驱体、巯基乙酸为稳定剂,采用超声辐射的方法,室温制备了在水溶液中能稳定存的CdSe量子点.对CdSe的红外可见光谱、紫外可见光谱及XRD谱的进行了分析与比对.研究结果表明:紫外可见光谱中450nm处出现了CdSe量子点第一激子吸收,CdSe的XRD的2θ角为25.4°、42.0°、49.6°,证明CdSe的制备成功;通过CdSe和端胺基碳纳米管之间的荧光光谱,证明从CdSe到碳纳米管发生了高效电子转移.CdSe quantum dots can be prepared by a lot of methods,but the prosess has harsh reaction conditions,high synthesis cost and toxicity,and it is not soluble in water.A mild way to prepare the water-soluble CdSe quantum dot is proposed.By microwave,the water-soluble CdSe quantum dots,with high luminescent efficiency,are synthesized using mercaptoacetic acid as stabilizer,NaHSe as precursor.Analysis of infrared spectra,UV-visible spectra and XRD proves：The first exciton absorption in 450 nm of UV-visible spectra of CdSe quantum dots appears,and 2θof CdSe in XRD equals 25.4°,42.0°and49.6°,which indicates the synthesis of water-soluble CdSe quantum dots is achieved successfully.Fluorescence spectrum shows that the luminescent of CdSe is efficiently quenched by amino functionalized carbon nanotubes.Therefor,it is proved that efficient electron transfer process occurs from CdSe to the the carbon nanotubes in this composite.

关 键 词：水溶性 量子点 碳纳米管 超声辐射 

分 类 号：O614.242[理学—无机化学]