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Hydrothermal Synthesis of Three Dimensional Graphene‐Multiwalled Carbon Nanotube Nanocomposite for Enhanced Electro Catalytic Oxidation of Caffeic Acid
Author(s) -
Sakthinathan Subramanian,
Kubendhiran Subbiramaniyan,
Chen ShenMing
Publication year - 2017
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.201600687
Subject(s) - amperometry , dielectric spectroscopy , materials science , cyclic voltammetry , electrode , nanocomposite , graphene , raman spectroscopy , nanotube , carbon nanotube , detection limit , chemical engineering , analytical chemistry (journal) , electrochemistry , nanotechnology , chemistry , chromatography , physics , engineering , optics
Three dimensional graphene‐multiwalled carbon nanotube nano composite (3DG/MWCNTs−Nc) was synthesized by simple hydrothermal method for the amperometric determination of caffeic acid (CA). The prepared nanocomposite was characterized by scanning electron microscopic technique (SEM), ultraviolet‐visible spectroscopy (UV), Raman spectroscopy and infrared spectroscopy (IR). Moreover, the interfacial electron transfer properties of the modified electrode were carried out by the electro chemical impedance spectroscopy (EIS). Besides, the electro chemical performance of the modified electrode was carried out by the cyclic voltammetry (CV) and amperometric ( i‐t ) technique. The proposed electrode was exhibited an enhanced electrocatalytic activity towards the detection of CA. Under the optimal condition, the 3DG/MWCNTs−Nc modified electrode displayed a linear range from 0.2 to 174 μM, detection limit (LOD) 17.8 nM and sensitivity of 5.8308 μA μM −1 cm −2 and on applied potential + 0.2 V. These result showed, 3DG/MWCNTs−Nc modified electrodes showed good repeatability, reproducibility, and higher stability. In addition, the fabricated electrode was then successfully used to determine the CA in real samples with satisfactory recoveries. Which suggests that the 3DG/MWCNTs−Nc as a robust sensing materials for the electrochemical detection of CA.