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Porous Copper‐Modified Graphite Pencil Electrode for the Amperometric Detection of 4‐Nitrophenol
Author(s) -
Kawde AbdelNasser,
Aziz Md. Abdul
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.201400281
Subject(s) - amperometry , electrode , materials science , graphite , cyclic voltammetry , copper , electrochemistry , selectivity , inorganic chemistry , chemical engineering , chemistry , composite material , organic chemistry , catalysis , metallurgy , engineering
To overcome the well‐known carbon electrodes surface fouling of phenols, we report on a simple and rapid method for the preparation of a disposable porous Cu‐modified graphite pencil electrode (Cu‐GPE) for sensing 4‐nitrophenol (4‐NP). The bare‐ and Cu‐modified graphite pencil electrodes were characterized by cyclic voltammetry and SEM. The two electrodes displayed distinct electrocatalytic activities in response to the electrochemical redox reaction of 4‐NP. A difference of three orders of magnitude is obtained on the amperometric detection limits of 1.9 µM on porous Cu‐modified vs. 1.0 mM on bare‐graphite pencil electrode at 3 σ . The Cu‐GPEs are fabricated utilizing a simple single method, and at an extremely low cost with high stability, selectivity and sensitivity, offering a promising tool for sensing 4‐NP.