Reduced Graphene Oxide Supported Antimony Species for High-Performance Supercapacitor Electrodes

Abstract

Antimony species was chemically anchored on graphene oxide using antimony (III) chloride precursor and then converted to the reduced graphene oxide-antimony species composite by a well-established polyol method. The resultant composite was successfully used as supercapacitor electrodes in a two-electrode symmetric system with aqueous electrolyte. The specific capacitance calculated from the galvanostatic charge/discharge curves obtained for this composite was 289 F/g. The enhanced capacitance results were confirmed by the electrochemical impedance spectroscopy and cyclic voltammetry. The high capacitance of the reduced graphene oxide-antimony species composite arises from the combination of double-layer charging and pseudocapacitance caused by the Faradaic reactions of the intercalated antimony species and residual surface-bonded functional groups.

Reduced graphene oxide-Sb2O5 hybrid nanomaterial for the design of a laccase-based amperometric biosensor for estriol

“…Firstly, rGO/Sb2O5 was prepared by controlled oxidation of SbCl3 with the oxygen functional groups (epoxy and carbonyl moieties) at the GO nanosheets [29]. Simultaneously, the as-growing nanonanomaterial was deposited on the rGO basal planes by interaction with the remaining oxygen functional groups (hydroxyl and carboxylic acid moieties) on the carbon nanomaterial.…”

“…Simultaneously, the as-growing nanonanomaterial was deposited on the rGO basal planes by interaction with the remaining oxygen functional groups (hydroxyl and carboxylic acid moieties) on the carbon nanomaterial. This chemical bonding is induced by the ability of reduced graphene oxide to act as catalytic agent for the chemical disproportionation of the antimony dopant layer which favors the charge transfer between the adsorbed antimony species and the rGO lattice [29,30]. The nanohybrid was then treated with NaBH4 to ensure reduction of the partially reduced GO nanosheets.…”

Introducing Graphene–Indium Oxide Electrochemical Sensor for Detecting Ethanol in Aqueous Samples with CCD-RSM Optimization

“…The FTIR spectrum of the functionalised sample shows a slight increase in the alcoholic peaks, which could have been caused by hydrogen peroxide during the functionalization process, in which some -OH groups were attached to the graphene. A comparison of the FTIR spectrum of graphene oxide with reduced graphene oxide (Figure 2) demonstrates the noticeable reduction in the intensity of oxygen functional groups, mainly the broad O-H stretching at 3168.58 cm −1 , which confirms the successful reduction [81][82][83]. During the functionalisation procedure, the addition of hydrogen peroxide to the mixture indium and graphene not only helped with the development In2O3 from indium acetate among graphene layers, but also resulted in the generation and addition of extra alcoholic groups to the surface of graphene and led to the re-appearance of the hydroxyl stretching peak.…”

“…During the functionalisation procedure, the addition of hydrogen peroxide to the mixture indium and graphene not only helped with the development In2O3 from indium acetate among graphene layers, but also resulted in the generation and addition of extra alcoholic groups to the surface of graphene and led to the re-appearance of the hydroxyl stretching peak. The FTIR spectrum of the functionalised sample shows a A comparison of the FTIR spectrum of graphene oxide with reduced graphene oxide (Figure 2) demonstrates the noticeable reduction in the intensity of oxygen functional groups, mainly the broad O-H stretching at 3168.58 cm −1 , which confirms the successful reduction [81][82][83]. During the functionalisation procedure, the addition of hydrogen perox-ide to the mixture indium and graphene not only helped with the development In 2 O 3 from indium acetate among graphene layers, but also resulted in the generation and addition of extra alcoholic groups to the surface of graphene and led to the re-appearance of the hydroxyl stretching peak.…”

Application of GO in Energy Conversion and Storage

“…Even more impressively, the NiS/GO nanocomposite display a very high specific capacitance of 800 F g −1 at 1 A g −1 and long cycle life over 1,000 cycles [217]. On the other hand, the Sb/RGO composite also shows promising potential for supercapacitor electrode due to its high specific capacitance of 289 F g −1 (mainly contributed by the pseudocapacitance) and very good cyclability up to 1,000th [218]. The cellulose is also proposed to couple RGO for SC electrode but the composite only delivers a low specific capacitance of 71.2 F g −1 at the current density of 50 mA g −1 [219].…”