Electrochemical sensing based MWCNT-Cobalt tetra substituted sorbaamide phthalocyanine onto the glassy carbon electrode towards the determination of 2-Amino phenol: A voltammetric study

Abstract

This work describes the synthesis of novel cobalt tetra substituted sorbaamide phthalocyanine (CoTSAPc) and their characterization by FT-IR, UV, Mass, PXRD, SEM and electrochemical analysis. The electrochemical oxidation of 2-amino phenol (2-AP) was studied on MWCNT-CoTSAPc/GCE due to its better electron transferring ability than bare GCE and CoTSAPc/GCE since there is acceleration in surface area of glassy carbon electrode by multiwalled carbon nano tubes. Therefore electrochemical sensing of 2-AP has done on MWCNT-CoTSAPc/GCE in linear range of (CV 0.1–30, DPV 0.1–38, CA 0.05–20 μmol L−1), lower detection limit of (CV 0.03, DPV 0.03, CA 0.016 μmol L−1) and sensitivity of (CV 56.03, DPV 114.09, CA 177.14 μA μM−1 cm−2). The fabricated sensor shows good electrocatalytic activity than modified electrode with Pc alone towards oxidation of 2-AP. The MWCNT-CoTSAPc/GCE shows good repeatability, stability and high selectivity even in the presence of excess O-nitrophenol, P-nitrophenol, bisphenol A, aniline and hydroquinone.