Overoxidation of Conducting Polymers Combined with In Situ Plated Bismuth Film: An Approach for Simultaneous Detection of Cadmium and Lead Ions. Issue 4 (16th January 2015)

• Record Type: Journal Article
• Authors: Tao, Yongxin; Gu, Xiaogang; Pan, Yan; Deng, Linhong; Wei, Yong; Kong, Yong; Li, Wei
• Is Part Of: Journal of the Electrochemical Society. Volume 162:Issue 4(2015)
• Page Start: H194
• Page End: H199
• Publication Date: 2015-01-16
• Subjects: Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0131504jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : Thiolated poly( m -phenylenediamine) (P m PD), overoxidized in NaOH solution, was used in combination with in situ plated Bi film electrode for simultaneous and sensitive analysis of Cd 2+ and Pb 2+ by square wave anodic stripping voltammetry (SWASV). Thiolation of P m PD was achieved during the electropolymerization of m -phenylenediamine, and the introduced S atoms improved the preconcentration efficiency of the P m PD for Cd 2+ and Pb 2+ ; and overoxidation altered the surface structure of the polymer, which endowed more active area for the nucleation of Bi. Due to the synergetic effect of thiolation, overoxidation and Bi film, the prepared P m PD modified Bi film exhibited excellent performances in the simultaneous analysis of Cd 2+ and Pb 2+, showing a linear range from 6 to 240 μg L −1 for Cd 2+ and Pb 2+ . The detection limits were 0.02 μg L −1 for Cd 2+ and 0.04 μg L −1 for Pb 2+, respectively. This approach opens a new avenue to monitor trace heavy metal ions precisely and rapidly.