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Metallated porphyrin noncovalent interaction with reduced graphene oxide‐modified electrode for amperometric detection of environmental pollutant hydrazine
Author(s) -
Sakthinathan Subramanian,
Kubendhiran Subbiramaniyan,
Chen ShenMing,
Govindasamy Mani,
AlHemaid Fahad M.A.,
Ajmal Ali M.,
Tamizhdurai P.,
Sivasanker S.
Publication year - 2017
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.3703
Subject(s) - amperometry , chemistry , graphene , nanocomposite , cyclic voltammetry , porphyrin , electrode , electrochemical gas sensor , hydrazine (antidepressant) , inorganic chemistry , raman spectroscopy , electrochemistry , photochemistry , nanotechnology , materials science , chromatography , physics , optics
A reduced graphene oxide/platinum(II) tetraphenylporphyrin nanocomposite (RGO/Pt‐TPP)‐modified glassy carbon electrode was developed for the selective detection of hydrazine. The RGO/Pt‐TPP nanocomposite was successfully prepared via noncovalent π–π stacking interaction. The prepared nanocomposite was characterized using nuclear magnetic resonance, electrochemical impedance, ultraviolet–visible and Raman spectroscopies, scanning electron microscopy and X‐ray diffraction. The electrochemical detection of hydrazine was performed via cyclic voltammetry and amperometry. The RGO/Pt‐TPP nanocomposite exhibited good electrocatalytic activity towards detection of hydrazine with low overpotential and high oxidation peak current. The fabricated sensor exhibited a wide linear range from 13 nM to 232 μM and a detection limit of 5 nM. In addition, the fabricated sensor selectively detected hydrazine even in the presence of 500‐fold excess of common interfering ions. The fabricated electrode exhibited good sensitivity, stability, repeatability and reproducibility. In addition, the practical applicability of the sensor was evaluated in various water samples with acceptable recoveries.