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Design of a nanostructured electromagnetic polyaniline–keggin iron–clay composite modified electrochemical sensor for the nanomolar detection of ascorbic acid
Author(s) -
Lilly Reena Viswan,
Devaki Sudha Janardhanan,
Narayanan Rohini Kuttiplavil,
Sadanandhan Neethu Kalloor
Publication year - 2014
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.40936
Subject(s) - polyaniline , ascorbic acid , materials science , electrode , electrochemistry , composite number , electrochemical gas sensor , conductive polymer , chemical engineering , polymerization , inorganic chemistry , composite material , chemistry , polymer , food science , engineering
This article demonstrates the design and fabrication of an electrochemical sensor based on a platinum electrode for ascorbic acid (AA) modified by an electromagnetic polyaniline–Keggin iron–clay (PPICS) composite. The polyaniline–polyhydroxy iron–clay composite was prepared by the polymerization of [Anilinium] + [PDPSA] − in the presence of Keggin iron intercalated clay and was characterized for its particle size, morphology, electrical conductivity, and saturation magnetization. The oxidation potential of AA was observed at +0.4 V on the bare electrode and shifted to a negative potential of −0.32 V on the modified electrode. Common possible interferences of the sample matrices were tested, and the results reveal that the PPICS‐modified electrode exhibited a high selectivity and sensitivity toward AA. This unique low‐cost and user‐friendly sensor was validated for the nanomolar detection of AA present in real samples. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 40936.