Abstract
Abstract We have grown Cu2O films by different routes including self-oxidation and metal-organic deposition (MOD). The reduction efficiency of Cu2O films on graphene oxide (GO) synthesized by modified Hummer’s method has been studied. Surface morphology and chemical state of as-prepared Cu2O film and GO sheets reduced at different conditions have also been investigated using atomic force microscopy (AFM) and x-ray photoelectron spectroscopy (XPS). Results show that self-oxidation Cu2O film is more effective on phtocatalytic reduction of GO than MOD-Cu2O film. Moreover, reduction effect of self-oxidation Cu2O film to GO is comparable to that of environmental-friendly reducing agent of vitamin C. The present results offer a potentially eco-friendly and low-cost approach for the manufacture of reduced graphene oxide (RGO) by photocatalytic reduction.
Highlights
Graphene as a two dimensional carbon material has gathered much more attention with its application prospect in various fields, such as energy storage, radiator, sensors, aviation and space, anti-bacterial, due to its high electric conductivity, good thermal conductivity, large specific surface area, and high mechanical strength, antibacterial activity [1,2,3,4,5,6]
Surface morphology and chemical state of as-prepared Cu2O film and graphene oxide (GO) sheets reduced at different conditions have been investigated using atomic force microscopy (AFM) and x-ray photoelectron spectroscopy (XPS)
Modified Hummer’s method, a chemical oxidationreduction method, offers lower processing costs and more simple operation than other synthesis methods. This chemical synthesis method is promising for mass production of GO and reduced graphene oxide (RGO) because it is easy for scale-up [10, 13, 14]
Summary
Graphene as a two dimensional carbon material has gathered much more attention with its application prospect in various fields, such as energy storage, radiator, sensors, aviation and space, anti-bacterial, due to its high electric conductivity, good thermal conductivity, large specific surface area, and high mechanical strength, antibacterial activity [1,2,3,4,5,6]. Choobtashani and Akhavan [18] found out that tungsten oxide film synthesized by various routes showed significant differences in photocatalytic reduction efficiency of the GO platelets especially after exposure to visible light of the environment [18]. He thought that the ZnO nanoparticles in the ZnO/GO composite could be applied in a gradual chemical reduction and tuning the electrical conductivity of the GO platelets by variation of UV irradiation time in a photocatalytic process [19]. A comparative study of the potocatalytic reduction efficiency and eco-friendly reducing agent vitamin C to GO has been done
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