Citation: GUAN Xiaolin, JIA Tianming, QIN Yuxin, ZHANG Donghai, ZHANG Yang, FAN Hongting, WEI Qiangbing, LAI Shoujun. Aqueous Synthesis of Thiol-functionalized Polyvinylalcohol/CdS Quantum Dots Nanocomposite at Low Temperature for Detection of Trace Cu²⁺ in Water[J]. Chinese Journal of Applied Chemistry, ;2017, 34(3): 291-299. doi: 10.11944/j.issn.1000-0518.2017.03.160213 shu

Aqueous Synthesis of Thiol-functionalized Polyvinylalcohol/CdS Quantum Dots Nanocomposite at Low Temperature for Detection of Trace Cu²⁺ in Water

a.
Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education; Key Laboratory of Polymer Materials Ministry of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
b.
School of Chemical Engineering, Lanzhou University of Arts and Science, Lanzhou 730000, China

Corresponding author: GUAN Xiaolin, guanxiaolin@nwnu.edu.cn.com
Received Date: 23 May 2016
Revised Date: 27 June 2016
Accepted Date: 14 July 2016

Fund Project: Specialized Research Fund for the Doctoral Program of Higher Education No.20136203120002Supported by the National Natural Science Foundation of China No.51363019, No.21504070

Figures(11)

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.
- CdS quantum dots,
- polyvinylalcohol,
- nanocomposites,
- fluorescence sensing,
- Cu²⁺
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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Aqueous Synthesis of Thiol-functionalized Polyvinylalcohol/CdS Quantum Dots Nanocomposite at Low Temperature for Detection of Trace Cu2+ in Water

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通讯作者: 陈斌, bchen63@163.com

Aqueous Synthesis of Thiol-functionalized Polyvinylalcohol/CdS Quantum Dots Nanocomposite at Low Temperature for Detection of Trace Cu²⁺ in Water