摘要
以二乙烯三胺基丙基三甲氧基硅烷与甘油混合前驱物,采用水热一步法合成高荧光产率(25%)硅掺杂碳点(Si-CDs),通过透射电镜(TEM)、X射线衍射(XRD)、傅里叶变换红外光谱(FTIR)、X射线光电子能谱(XPS)对Si-CDs进行了表征,通过荧光光谱、紫外可见光谱对Si-CDs光学性能进行研究.基于Co^(2+)对Si-CDs荧光猝灭效应,将其作为荧光探针检测Co^(2+),在Co^(2+)浓度为0.1—50μmol·L^(-1)范围内Si-CDs的荧光猝灭强度与其浓度呈现良好的线性关系,相关系数为0.9915,检出限为74 nmol·L^(-1).方法用于环境水样中Co^(2+)测定,回收率在97.18%—102.3%.
A method for preparation of the silicon doped carbon dots(Si-CDs)was established via hydrothermal method by using diethylenetriaminopropyltrimethylsilane and glycerin as precursors.The as-prepared Si-CDs were characterized by transmission electron microscopy(TEM),X Ray diffraction(XRD),Fourier transform infrared spectroscopy(FTIR),X-ray photoelectron spectroscopy(XPS),fluorescence spectrophotometer and UV-vis absorption spectra.The detection of cobalt(Ⅱ)ion(Co^(2+))was set up based on the fluorescence quenching of Si-CDs.A good linear range from 0.1-50μmol·L^(-1)was obtained between fluorescence quenching and concentration of Co^(2+)with detection limit of 74 nmol·L^(-1),and the correlation coefficient was 0.9915.Finally,this method was applied in the analysis of waste water samples with the recoveries of 97.18%—102.3%.
作者
祝艳
鲁应光
母昭
杨亚玲
ZHU Yan;LU Yingguang;MU Zhao;YANG Yaling(Central monitoring center of Kunming City,Kunming,650028,China;Yunnan Jianniu Bio Technology Co.,Ltd,Kunming,650033,China;Faculty of Life Science and Technology,Kunming University of Science and Technology,Kunming,650500,China)
出处
《环境化学》
CAS
CSCD
北大核心
2020年第12期3517-3523,共7页
Environmental Chemistry
关键词
硅掺杂碳点
钴离子
荧光猝灭
废水
silicon doped carbon dots
Co^(2+)
fluorescence quenching
waste water samples
作者简介
通讯联系人:杨亚玲,Tel:13888316388,E-mail:yilyil8@163.com
