Electrical, thermal and electrochemical properties of γ-ray-reduced graphene oxide

Abstract

The properties of γ-ray-reduced graphene oxide samples (GRGOs) were compared with those of hydrazine hydrate-reduced graphene oxide (HRGO). Fourier transform infrared spectroscopy, X-ray diffractometry, Raman spectroscopy, Brunauer-Emmett-Teller surface area analysis, thermogravimetric analysis, electrometry, and cyclic voltammetry were carried out to verify the reduction process, structural changes, and defects of the samples, as well as to measure their thermal, electrical, and electrochemical properties. Irradiation with γ-rays distorted the structure of GRGOs and generated massive defects through the extensive formation of new smaller sp 2 -hybridized domains compared with those of HRGO. The thermal stability of GRGOs was higher than that of HRGO, indicating the highly efficient removal of thermally-labile oxygen species by γ-rays. RRGO prepared at 80 kGy showed a pseudocapacitive behavior comparable with the electrical double-layer capacitance behavior of HRGO. Interestingly, the specific capacitance of GRGO was enhanced by nearly three times compared with that of HRGO. These results reflect the advantages of radiation reduction in energy storage applications.

Carbon Nanomaterials Based Supercapacitors: Recent Trends

“…Due to its low mass density, extremely large surface area, great conductivity, and high flexibility, graphene has widespread use in various sectors, including energy storage and conversion, electronic devices, sensors, polymer additives, and biological applications [10][11][12][13][14][15]. Different graphene synthesis approaches are reported as mechanical filiation, epitaxial growth, chemical vapor deposition, and reduction of graphene oxide [9].…”

Structural, mechanical, and thermal features of PVA/starch/graphene oxide nanocomposite enriched with WO3 as gamma–ray radiation shielding materials for medical applications

“…GO is employed to prepare reduced GO and enhance the physical properties of polymeric composites. [19][20][21][22][23][24][25][26] The thermal and mechanical characteristics of a PVA/starch matrix have been improved using GO because its chemical structure with OH and COOH groups can regulate the film's shape and aggregation by a chemical combination. 13,27 Actacid orange RL (AO-RL) dye was removed using different polymeric-GO nanocomposites, such as GO/polypyrrole, GO/polyaniline, and GO/polystyrene.…”

“…Graphene oxide (GO) is one of the graphene derivatives, a two‐dimensional (2D) carbonaceous flake containing various active functional groups, such as carboxyl and hydroxyl. GO is employed to prepare reduced GO and enhance the physical properties of polymeric composites 19–26 . The thermal and mechanical characteristics of a PVA/starch matrix have been improved using GO because its chemical structure with OH and COOH groups can regulate the film's shape and aggregation by a chemical combination 13,27 .…”

Gamma Radiation Assisted Green Reduction of Graphene Oxide by Doum Palm (Hyphaene Thebaica) Fruit Powder.

“…The irradiation causes water radiolysis and produces oxidative and reductive species. The addition of alcohol as a scavenger of oxidative species while reductive species reduce is reported to be essential [7,14,36]. So it can deduce that GO reduction via γrays can't happen without alcohol.…”