A highly selective and sensitive reusable colorimetric sensor for Ag+ based on thiadiazole-functionalized polyacrylonitrile fiber. Issue 25 (8th June 2016)

• Record Type: Journal Article
• Authors: Gao, Runjiao; Xu, Gang; Zheng, Lishuo; Xie, Yujia; Tao, Minli; Zhang, Wenqin
• Is Part Of: Journal of materials chemistry. Volume 4:Issue 25(2016)
• Page Start: 5996
• Page End: 6006
• Publication Date: 2016-06-08
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c6tc00621c
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : DPTD-PANP F exhibits excellent chelating selectivity and sensitivity towards Ag + with a remarkable visual color change from yellow to red-brown. Abstract : A thiadiazole-functionalized polyacrylonitrile fiber (DPTD-PANP F) 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 (Pb 2+, Hg 2+, Cd 2+, Zn 2+, and Cu 2+ ) and generates a remarkable visual color change from yellow to red-brown over a wide pH range from 3 to 12. The DPTD-PANP F 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.