Open AccessSynthesis, Characterization, Photocatalytic and Electrochemical Studies of Reduced Graphene Oxide Doped Nickel Oxide Nanocomposites
Author(s) -
M. Venkatachalam,
R. Elancheran,
P. Revathi,
Umapathy Vanitha,
P. Sivaprakasam,
K. Krishnasamy
Publication year - 2021
Publication title -
asian journal of chemistry/asian journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.145
H-Index - 34
eISSN - 0975-427X
pISSN - 0970-7077
DOI - 10.14233/ajchem.2021.22979
Subject(s) - non blocking i/o , nanocomposite , photocatalysis , nickel oxide , graphene , rhodamine b , chemical engineering , crystallite , oxide , materials science , cyclic voltammetry , nanomaterials , fourier transform infrared spectroscopy , photodegradation , chemistry , nuclear chemistry , inorganic chemistry , electrochemistry , nanotechnology , metallurgy , organic chemistry , electrode , engineering , catalysis
Elimination of organic pollutants from waste waters under the sunlight irradiation is a venerablechallenge in the fields of environmental and materials science. This work aims to the fabrication ofnovel self-assembled, controlled rGO@NiO nanocomposite using eco-friendly simple co-precipitationmethod. The crystallite size, morphology and optical properties of the rGO, NiO and rGO@NiO werecharacterized using TG/DTA, FTIR, UV, XRD, SEM with EDAX and TEM techniques. The opticalbandgap of the pure NiO, rGO and rGO@NiO nanocomposites was estimated as 3.75, 5.43 and 3.64eV, respectively. Hence rGO@NiO nanocomposite might be considered as a semi-conductor and canbe utilized as a photocatalyst. The photocatalytic activity of prepared rGO@NiO nanocomposite wasevaluated by using rhodamine B and methyl violet dyes. The degradation results revealed that almost90% of dye degradation is carried out within a period of 60 min. The cyclic voltammetry studiesindicated that the prepared rGO@NiO nanomaterials exhibited appreciable super capacitance value(233 F g-1) at a current density of 1 A g-1.