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Electrochemical Oxidation of Hazardous Tetracene to Highly Redox Active Anthraquinone and Hydroquinone Derivatives on a Carbon Nanotube‐Modified Electrode and Its Selective Hydrogen Peroxide Sensing
Author(s) -
Barathi Palani,
Kumar Annamalai Senthil
Publication year - 2014
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201400250
Subject(s) - hydroquinone , redox , tetracene , cyclic voltammetry , carbon nanotube , electrochemistry , amperometry , inorganic chemistry , hydrogen peroxide , chemistry , anthraquinone , electrode , electrocatalyst , raman spectroscopy , quinone , photochemistry , materials science , organic chemistry , nanotechnology , anthracene , physics , optics
A simple method for electrochemical oxidation and degradation of carcinogenic tetracene (TC) to surface confined redox active quinone species (TCO) on a pristine‐multiwalled carbon nanotube modified (MWCNT) gold electrode surface (Au/MWCNT) by applying a static potential at 0.9 V vs. Ag/AgCl in pH 7 phosphate buffer solution has been demonstrated. Various physicochemical characterizations of MWCNT@TCO by TEM, FT‐IR, Raman spectroscopy and GC‐MS reveal the presence of two types of redox sites, hydroquinone and anthraquinone derivatives within the MWCNT@TCO. The modified electrode showed selective electrocatalytic reduction and amperometric i – t sensing of H 2 O 2 with a detection limit (signal‐to‐noise=3) of 122 nM.