title: Synthesis of a novel electrode material containing phytic acid-polyaniline nanofibers for simultaneous determination of cadmium and lead ions.
abstract: The development of nanostructured conducting polymers based materials for electrochemical applications has attracted intense attention due to their environmental stability, unique reversible redox properties, abundant electron active sites, rapid electron transfer and tunable conductivity. Here, a phytic acid doped polyaniline nanofibers based nanocomposite was synthesized using a simple and green method, the properties of the resulting nanomaterial was characterized by electrochemical impedance spectroscopy (EIS), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS). A glassy carbon electrode modified by the nanocomposite was evaluated as a new platform for the simultaneous detection of trace amounts of Cd2+and Pb2+using differential pulse anodic stripping voltammetry (DPASV). The synergistic contribution from PANI nanofibers and phytic acid enhances the accumulation efficiency and the charge transfer rate of metal ions during the DPASV analysis. Under the optimal conditions, good linear relationships were obtained for Cd2+in a range of 0.05-60 μg L-1, with the detection limit (S/N = 3) of 0.02 μg L-1, and for Pb2+in a range of 0.1-60 μg L-1, with the detection limit (S/N = 3) of 0.05 μg L-1. The new electrode was successfully applied to real water samples for simultaneous detection of Cd2+and Pb2+with good recovery rates. Therefore, the new electrode material may be a capable candidate for the detection of trace levels of heavy metal ions.
authors.affiliation: Key Laboratory for Colloid and Interface Chemistry of State Education Ministry, School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Huang
authors.affiliation: Key Laboratory for Colloid and Interface Chemistry of State Education Ministry, School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China.
authors.forename: Wencai
authors.initials: W
authors.lastname: Zhu
authors.affiliation: Key Laboratory for Colloid and Interface Chemistry of State Education Ministry, School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China.
authors.forename: Xiaochun
authors.initials: X
authors.lastname: Gao
authors.affiliation: Shandong Academy of Sciences, Jinan, 250114, China.
authors.forename: Xiuyu
authors.initials: X
authors.lastname: Liu
authors.affiliation: Key Laboratory for Colloid and Interface Chemistry of State Education Ministry, School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China. Electronic address: hyma@sdu.edu.cn.
authors.forename: Houyi
authors.initials: H
authors.lastname: Ma
keywords: Bismuth film electrode; Differential pulse anodic stripping voltammetry; Heavy metal ions; Phytic acid; Polyaniline nanofibers; Simultaneous determination