ZnO decorated graphene nanosheets: an advanced material for the electrochemical performance and photocatalytic degradation of organic dyes

Abstract

The objective of the current research was mainly focused on synthesizing the Reduced Graphene Oxide (RGO) using modified Hummers method and ZnO functionalized reduced graphene oxide (RGO) composite was fabricated by a one-pot approach. The ZnO functionalized graphene nanosheets were characterized by X-ray diffractometer (XRD) and surface morphology was examined using Transmission Electron Microscopy (TEM). Electrochemical characteristics of the ZnO/RGO composite were investigated through cyclic voltammetry and electrochemical impedance spectroscopy (EIS). The composite was capable of delivering a high specific capacitance with excellent cycling stability. The ZnO decorated RGO catalyst was also applied to degrade different nonvolatile compounds such as Methyl Blue (MB) and Indigo carmine (IC). The performance of RGO/ZnO shows rapid degradation of dyes of high concentrations.

Cyclic Voltammetry and Electrochemical Impedance Spectral Properties of MnO2 Obtained by Waste Discarded Batteries Using Eco-Friendly Leaching Materials

“…10a shows the low frequency region, the impedance plot increases sharply and tends to become vertical lines, which are the characteristics of pure capacitive behaviour. At the high frequencies, it is apparent that the values of Rs and Rct gradually decrease with decreasing Warburg impedance [28,29]. This result is partially caused by the conductivity of the sample.…”

Assessment of Antioxidant Activity of Pure Graphene Oxide (GO) and ZnO-Decorated Reduced Graphene Oxide (rGO) Using DPPH Radical and H2O2 Scavenging Assays

“…The synergistic effects of the surface plasmonic resonance of AuNPs or the hydrophilic nature of the Ag-graphene nanocomposite and the specific electronics effect of graphene holds great promise for adsorption and photocatalysis application [2,11]. Additionally, zinc oxide (ZnO) nanoparticle-decorated graphene nanosheets are considered as an advanced material for their electrochemical performance and photocatalytic degradation of organic dyes [12,13]. Under such conditions, ZnO can act as a photocatalyst while graphene acts as an electron-acceptor/transport material to facilitate the migration of photogenerated electrons and hinders electron-hole recombination [12].…”

“…Additionally, zinc oxide (ZnO) nanoparticle-decorated graphene nanosheets are considered as an advanced material for their electrochemical performance and photocatalytic degradation of organic dyes [12,13]. Under such conditions, ZnO can act as a photocatalyst while graphene acts as an electron-acceptor/transport material to facilitate the migration of photogenerated electrons and hinders electron-hole recombination [12]. Furthermore, decorating the graphene surface with ZnO can be greatly improve their antibacterial and antioxidant properties [14].…”

Layer by layer synthesis of zinc-iron layered hydroxy sulfate for electrocatalytic hydrogen evolution from ethanol in alkali media

“…Also, compounds of various classes, called electrocatalysts, are used as electrode materials: oxides (hydroxides), sulfides, phosphides, nitrides, and etc. [19][20][21][22]. The advantage of electrocatalysts over pure metals or alloys is their high efficiency at a relatively low cost.…”