摘要
以巯基丁二酸为稳定剂,二氧化硒为硒源,合成高质量水溶性CdSe量子点.采用反相微乳液技术,制备以CdSe量子点为核的SiO2荧光纳米颗粒.在pH值为11.0的碱性条件下,当ncd：nse：nMSA=1：0.2：1.4时,在540 min时间内,可获得荧光发射峰在531～554 nm范围内连续可调CdSe量子点,最高荧光量子产率值可达14.7％.分别用紫外-可见光谱、荧光光谱、X射线粉末衍射和透射电镜等对CdSe量子点进行表征,用荧光光谱、透射电镜、红外光谱等对CdSe/SiO2荧光纳米颗粒的性能进行表征.
High quality CdSe quantum dots were prepared in an aqueous medium with selenium dioxide as selenium source and mercaptosuccinic acid as stabilizer. And the core-shell CdSe/SiO2nanoparticles were prepared via reverse microemulsion method. The CdSe QDs with the emission peak ranging from 531 to 554 nm could be prepared when pH was 11.0 and ncd： nse： nMPA= 1 ： 0. 2 ： 1. 4 within 540 min,and the maximum quantum yield was 14.7%. The properties of the obtained CdSe quantum dots and CdSe/SiO2 nanoparticles were characterized by UV-vis absorption spectra, photoluminescence spectra,X-ray powder diffraction,transmission electron microscopy and Fourier transform infrared spectroscopy ,respectively.
出处
《吉首大学学报（自然科学版）》
CAS
2014年第4期64-68,共5页
Journal of Jishou University(Natural Sciences Edition)
基金
广西壮族自治区教育厅科学研究项目(2013YB014)
关键词
反相微乳液
核壳结构
纳米颗粒
发光
reverse microemulsion
core-shell structure
nanoparticles
luminescence
