Sabereh Narouie - Department of Chemistry, Faculty of sciences, Ferdowsi University of Mashhad, Mashhad, Iran
Gholam Hossein Rounaghi - Department of Chemistry, Faculty of sciences, Ferdowsi University of Mashhad, Mashhad, Iran
Hamideh. Saravani - Inorganic Chemistry Research Laboratory, Department of Chemistry, University of Sistan and Baluchestan,P.O. Box ۹۸۱۳۵-۶۷۴, Zahedan, Iran

In the present work, we report a new method for facile and effective synthesis of poly(biphenol/biphenoquinone-vanadium (IV)) (poly BP/BQ-VIV) for the first time. The poly BP/BQ-VIV wasapplied for modification of a carbon past electrode (CPE/ poly BP/BQ-VIV) to enhance the electro-catalyticactivity towards electro-oxidation of ۴-nitrophenol (۴-NP) molecules in solutions. The structure and theproperties of the synthesized poly BP/BQ-VIV were characterized by various techniques such as FESEM, TEM,EDX, FT-IR, UV-Vis, XPS analysis, cyclic voltammetry, differential pulse voltammetry and electrochemicalimpedance spectroscopy. The CPE/ poly BP/BQ-VIV electrochemical sensor, exhibits a well-defined anodicpeak for ۴-NP molecules at ۱.۱۸ V vs. Ag/AgCl reference electrode. Under optimum experimental conditions,the CPE/ poly BP/BQ-VIV electrochemical sensor, shows a low detection limit of ۶۰ nM, current sensitivity of۰.۹۹۶ μA μM-۱ and a linear response in the concentration range of ۰.۰۵ to ۲۰۰ μM for quantitativemeasurement of ۴-NP in aqueous solutions. The results verify that the CPE/ poly BP/BQ-VIV presents excellentreproducibility, appreciable repeatability, satisfactory stability, and high selectivity for detecting of ۴-NP intap and river water samples

Poly biphenol/biphenoquinone-vanadium (IV), Voltammetric determination of ۴-nitrophenol, Tap and river water samples