应用化学2017，Vol.34Issue(3)：291-299,9.DOI:10.11944/j.issn.1000-0518.2017.03.160213
低温水相合成巯基化聚乙烯醇/CdS量子点纳米复合物及用于测定环境水样中痕量Cu2+
Aqueous Synthesis of Thiol-functionalized Polyvinylalcohol/CdS Quantum Dots Nanocomposite at Low Temperature for Detection of Trace Cu2+ in Water
摘要
Abstract
A high quality PVA/CdS QDs nanocomposites modified by thiol-functionalized polyvinylalcohol (PVA) was prepared by aqueous synthetic approaches at low temperature.The samples were characterized by infrared spectroscopy (IR),X-ray diffraction (XRD),transmission electron microscopy (TEM),thermogravimetric analysis (TG),photoluminescence spectroscopy (PL) and ultraviolet-visible spectroscopy (UV-Vis).The results show that CdS QDs in the nanocomposites are spherical particles with a cubic crystal structure and a diameter size of about 5 nm.PVA/CdS nanocomposites have good stability,high dispersibility and excellent luminescence properties.Meanwhile,the fluorescent responses of as-prepared PVA/CdS to different metal ions were studied.Based on the fluorescence quenching behavior of PVA/CdS quantum dots,we established a method for the fluorescent detection of Cu2+.When the concentration of Cu2 + is in the range of 1 ～ 1000 nmol/L,the fluorescence intensity linearly decreases with the increase of Cu2+ concentration.The linear correlation coefficient is 0.9923 and the detection limit reaches 0.12 nmol/L.The method provides high sensitivity,simplicity of operation and low detection limit,and is successfully applied to the determination of trace copper in the Yellow River samples.关键词
CdS量子点/聚乙烯醇/纳米复合物/荧光检测/CU2+Key words
CdS quantum dots/polyvinylalcohol/nanocomposites/fluorescence sensing/Cu2+分类
化学化工引用本文复制引用
关晓琳,贾天明,秦雨欣,张东海,张扬,范红婷,魏强兵,来守军..低温水相合成巯基化聚乙烯醇/CdS量子点纳米复合物及用于测定环境水样中痕量Cu2+[J].应用化学,2017,34(3):291-299,9.基金项目
国家自然科学基金(51363019,21504070)、高等学校博士学科点专项科研基金联合资助基金(20029838)资助 （51363019,21504070）
Supported by the National Natural Science Foundation of China(No.51363019,No.21504070),Specialized Research Fund for the Doctoral Program of Higher Education (No.20136203120002) （No.51363019,No.21504070）
