Design of a Nanostructured Electromagnetic Polyaniline-Keggin Iron-Clay Composite Modified Electrochemical Sensor for the Nanomolar Detection of Ascorbic Acid

作者：Lilly Reena Viswan; Devaki Sudha Janardhanan^*; Narayanan Rohini Kuttiplavil; Sadanandhan Neethu Kalloor

来源：Journal of Applied Polymer Science, 2014, 131(24): 40936.

DOI：10.1002/app.40936

• clay
• conducting polymers
• electrochemistry
• emulsion polymerization
• magnetism and magnetic properties

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] 1 [PDPSA] 2 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.

• 出版日期2014-12-15