Open AccessMethyl parathion detection in vegetables and fruits using silver@graphene nanoribbons nanocomposite modified screen printed electrode
Author(s) -
Mani Govindasamy,
Veerappan Mani,
ShenMing Chen,
ShenMing Chen,
Ashok K. Sundramoorthy
Publication year - 2017
Publication title -
scientific reports
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.24
H-Index - 213
ISSN - 2045-2322
DOI - 10.1038/srep46471
Subject(s) - nanocomposite , graphene , electrode , materials science , raman spectroscopy , electrochemistry , graphene nanoribbons , nanotechnology , carbon nanotube , chemical engineering , electrochemical gas sensor , selectivity , catalysis , chemistry , organic chemistry , physics , engineering , optics
We have developed a sensitive electrochemical sensor for Organophosphorus pesticide methyl parathion (MP) using silver particles supported graphene nanoribbons (Ag@GNRs). The Ag@GNRs nanocomposite was prepared through facile wet chemical strategy and characterized by TEM, EDX, XRD, Raman, UV-visible, electrochemical and impedance spectroscopies. The Ag@GNRs film modified screen printed carbon electrode (SPCE) delivers excellent electrocatalytic ability to the reduction of MP. The Ag@GNRs/SPCE detects sub-nanomolar concentrations of MP with excellent selectivity. The synergic effects between special electrocatalytic ability of Ag and excellent physicochemical properties of GNRs (large surface area, high conductivity, high area-normalized edge-plane structures and abundant catalytic sites) make the composite highly suitable for MP sensing. Most importantly, the method is successfully demonstrated in vegetables and fruits which revealed its potential real-time applicability in food analysis.