A highly selective and sensitive reusable colorimetric sensor for Ag+ based on thiadiazole-functionalized polyacrylonitrile fiber

被引：36
作者：
Gao, Runjiao [1 ]
Xu, Gang [1 ]
Zheng, Lishuo [1 ]
Xie, Yujia [1 ]
Tao, Minli [1 ,2 ]
Zhang, Wenqin [1 ,2 ]
机构：
[1] Tianjin Univ, Sch Sci, Dept Chem, Tianjin 300072, Peoples R China
[2] Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin 300072, Peoples R China
来源：
JOURNAL OF MATERIALS CHEMISTRY C | 2016年 / 4卷 / 25期
基金：
中国国家自然科学基金;
关键词：
SILVER ION; AQUEOUS-MEDIUM; FLUORESCENT; HG2+; NANOPARTICLES; METAL; CHEMOSENSOR; DERIVATIVES; ADSORPTION; COMPLEXES;
D O I：
10.1039/c6tc00621c
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A thiadiazole-functionalized polyacrylonitrile fiber (DPTD-PANPF) qualitative colorimetric sensor was prepared for the first time, and its absorption properties were investigated in detail. The obtained sensor exhibits excellent chelating selectivity towards Ag+ without interference by other co-existing ions (Pb2+, Hg2+, Cd2+, Zn2+, and Cu2+) and generates a remarkable visual color change from yellow to red-brown over a wide pH range from 3 to 12. The DPTD-PANPF for Ag+ has a naked-eye detection limit of 11 ppb (only one in ten thousand of that of the small molecule DPTD) and a much higher saturation absorption capacity of 149 mg g(-1). Moreover, the fiber can be repeatedly used more than 50 times. In summary, this fiber sensor possesses the advantages of excellent selectivity, lower detection limit, outstanding absorption capacity and reusability to detect and remove Ag+ from water.
引用
收藏
页码：5996 / 6006
页数：11
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