Open AccessElectrochemical Behaviour of Graphene Oxide, Reduced Graphene Oxide and Zinc Oxide Graphene Oxide Composite Material Towards Fabrication of Dye Sensitized Solar Cell
Author(s) -
Sandhya Murali,
A. Jeya Rajendran
Publication year - 2020
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.2020.22647
Subject(s) - graphene , oxide , graphene oxide paper , dielectric spectroscopy , tafel equation , materials science , chemical engineering , nanocomposite , inorganic chemistry , electrochemistry , chemistry , nanotechnology , electrode , metallurgy , engineering
Graphene oxide (GO), reduced graphene oxide (rGO) and zinc oxide incorporated graphene oxide(ZnO-GO) nanoparticles were synthesized by wet-chemical technique. The ZnO-GO nanocompositewas synthesized from prepared graphene oxide. UV-visible and FTIR spectroscopy confirmed thepresence of oxygen functionalities on graphene oxide which was reduced to rGO on treatment withthe reducing agent. The XRD patterns revealed the formation of graphene oxide with a characteristicpeak at 10.6º which shifted to 24º during the formation of rGO. The crystallite size of all the synthesizedmaterial was calculated using Scherrer′s formula. The morphological behaviour of all materials wasanalyzed by scanning electron microscope (SEM). The electrochemical impedance data and Tafelplots suggested that the composite material has low charge transfer resistance (Rct) and hence couldact as a conducting material. The photoelectric conversion values, η for GO, rGO and ZnO-GO werecalculated as 2.5, 5.7 and 7.5%, respectively and these values signify that the zinc oxide incorporatedgraphene oxide material has unique properties of electron transport.