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Electrochemical Detection of Tetracycline on Highly Sensitive Benzene Sourced CVD Graphene‐Gold Nanoparticles Nanointerfaces
Author(s) -
Olugbenga Osikoya Adeniyi,
Poomani Govender Penny
Publication year - 2021
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.202060230
Subject(s) - graphene , chronoamperometry , raman spectroscopy , materials science , cyclic voltammetry , detection limit , electrode , scanning electron microscope , colloidal gold , nanotechnology , nanoparticle , analytical chemistry (journal) , electrochemistry , chemical engineering , chemistry , chromatography , composite material , physics , engineering , optics
The development of sensitive, fast and efficient nanointerfaces as platforms for electrochemical sensing devices for the detection of environmental pollutant including antibiotic pollutant has become a matter of priority for public safety. We report herein a benzene sourced graphene‐gold nanoparticle sensor for the detection of tetracycline using chronoamperometry. Structural analysis using Raman Spectroscopy and x‐ray diffraction spectroscopy (XRD) confirmed the presense of few‐layer graphene. Atomic force (AFM) and scanning electron microscopy (SEM) characterization results confirmed the synthesized graphene to be thin flat sheet‐like material with wide surface area and a thickness of less than 1 nm. Cyclic voltammetry characterization of the fabricated modified electrodes showed diffusion controlled process for the oxidation of tetracycline. The modified electrode exhibited a fast response to the detection of tetracycline and a sensitivity of 1,86×10 2 μA/mM/cm 2 .The theoretical detection limit (S/N=3) was 1,60×10 −1 μM and the linear dynamic range was from 2,90×10 1 μM to 1.53×10 3 μM.