Charge Behavior of Low-Dimensional V₂O₅/Graphene Nanoribbons Oxides Nanocomposites under Irradiation of Visible Light and its Application

Abstract

Due to its outstanding photo-catalysis properties, low-dimensional V2O5 has many important applications in lithium ion batteries, supercapacitors, electrochromic devices, photocatalysts, sensors, et al. As good photocatalysts for organic pollutants, some key issues of photocatalysts are charge generation, separation, transfer of nanocomposites under irradiation of visible light. To improve their important properties and pave the effective conductive channels for charge transfer and separation, low-dimensional V2O5/graphene nanoribbons nanocomposites were prepared. The emphasis is put on adsorption response to VOC of nanocomposite based on the QCM (quartz crystal microbalance) device. In order to investigate the mechanism of charge-generated by visible light, the photoconductivity response to visible light and 808 nm laser with low-power were studied based on interdigital electrodes of Au on flexible PET (polyethylene terephthalate) film substrate. Some good results were obtained. This illustrates that this nanocomposite can easily produce the charge-generate with visible light and 808 nm laser with low-power, avoiding the recombination of charge-generate by light. It would be good applications in remove the organic pollutants with photocatalysis effects.

Stacked vanadium pentoxide–zinc oxide interface for optically-chargeable supercapacitors

“…Thus, various materials such as titanium dioxide (TiO 2 ), zinc oxide (ZnO), halide perovskites, and vanadium pentoxide (V 2 O 5 ) are in vogue for optically-chargeable supercapacitors. 5–7 The metal oxides are well known for their high charge storage capabilities when used in a heterostructure with carbon and metal–organic frameworks (MOF). 8–12…”

“…Thus, various materials such as titanium dioxide (TiO 2 ), zinc oxide (ZnO), halide perovskites, and vanadium pentoxide (V 2 O 5 ) are in vogue for optically-chargeable supercapacitors. [5][6][7] The metal oxides are well known for their high charge storage capabilities when used in a heterostructure with carbon and metal-organic frameworks (MOF). [8][9][10][11][12] Among these materials, the low-cost ZnO shows intriguing characteristics such as high carrier mobility, long carrier diffusion, ease of synthesis on substrates, and non-toxicity.…”