Synthesis, Characterization, and Photocatalytic Activities of Graphene Oxide/metal Oxides Nanocomposites: A Review

Abstract

Sustainable water processing techniques have been extensively investigated and are capable of improving water quality. Among the techniques, photocatalytic technology has shown great potential in recent years as a low cost, environmentally friendly and sustainable technology. However, the major challenge in the industrial development of photocatalyst technology is to develop an ideal photocatalyst which must have high photocatalytic activity, a large specific surface area, harvest sunlight and shows recyclability. Keeping these views, the present review highlighted the synthesis approaches of graphene/metal oxide nanocomposite, characterization techniques and their prominent applications in photocatalysis. Various parameters such as photocatalyst loading, structure of photocatalyst, temperature, pH, effect of oxidizing species and wavelength of light were addressed which could affect the rate of degradation. Moreover, the formation of intermediates during photo-oxidation of organic pollutants using these photocatalysts is also discussed. The analysis concluded with a synopsis of the importance of graphene-based materials in pollutant removal. Finally, a brief overview of the problems and future approaches in the field is also presented.

Sustainable Synthesis of Silver Nanoparticles Using Marine Algae for Catalytic Degradation of Methylene Blue

“…In general, MB is made stable and colorless in an aqueous solution by reducing MB into leuco-methylene blue (LMB) and MBH 2 + [19]. In an oxidizing state, MB becomes blue and is easily reduced by reducing agents to the colorless, leuco forms (degraded product, DP) [60]. The Langmuir-Hinshelwood model was used to describe the possible mechanism for AgNPs aided catalytic breakdown of MB [61].…”

Design and engineering of graphene nanostructures as independent solar-driven photocatalysts for emerging applications in the field of energy and environment

“…There are several recent reviews focused on the photocatalytic activities of graphene nanostructures and their nanocomposites with semiconductor photocatalysts. 45–50 These reviews mainly deal with nanocomposites of graphene nanostructures with metal oxide semiconductors boosting the photocatalytic activities of semiconductors by enhancing the adsorptive properties and accelerating the charge transfer for the coupled photocatalyst system. These reviews are either focused on particular graphene nanostructure-metal oxide composites, their synthesis or on particular applications.…”

“…These reviews are either focused on particular graphene nanostructure-metal oxide composites, their synthesis or on particular applications. For example, a review by Jamjoum et al 48 focused on the synthesis of GO/metal oxide nanocomposites, their characterization and the photocatalytic degradation of organic pollutants. Similarly, Vasseghian et al 47 reviewed graphene-based materials for metronidazole degradation, whereas Kausor et al 45 reviewed GO-based semiconductor photocatalysts for the degradation of organic dye in waste water.…”

Bismuth/bismuth oxide-incorporated reduced graphene oxide nanocomposite: synthesis, characterisation, and photocatalytic activity

“…In particular, there is considerable interest in applying nanomaterials as a water-treatment method. For example, antifouling nanomembranes based on carbon materials such as reduced graphene oxide (rGO) and cellulose have relevant physical, chemical, and surface properties for water treatment [1][2][3]. However, antifouling membranes can also comprise inorganic materials in the form of polymers, mixed polymers, metals, and ceramics [4,5].…”