Abstract
Due to its importance in hydrogen production during the photolysis process of aqueous suspensions process, mixed TiO2/V2O5 metal-oxide semiconductors were prepared and subjected to crystal structure investigation using X-ray technique. The photoelectrochemical behavior of these TiO2/V2O5 was investigated by photolysis of aqueous suspensions of these oxides containing [Fe(CN)6]4-. X-ray diffraction analysis indicated that the TiO2 crystallites grow in the (1 0 1) direction, while The V2O5 crystallites seem to be growing in the (4 2 0) direction, with increasing concentration of V2O5. Photolysis studies show that photochemical activities that maintained the [Fe(CN)6]4/[Fe(CN)6]3- redox reversibility increased by increasing V2O5 up to 50% and then decreased at greater percentages. Aqueous nano systems used in these studies retained their stability as indicated by the reproducibility of their photo-catalytic activities.
Highlights
Water as an abundant source of hydrogen has been a focus of interest of green energy researchers
The photoelectrochemical behavior of these TiO2/V2O5 was investigated by photolysis of aqueous suspensions of these oxides containing [Fe(CN)6]4−
Photolysis studies show that photochemical activities that maintained the [Fe(CN)6]4−/[Fe(CN)6]3− redox reversibility increased by increasing V2O5 up to 50% and decreased at greater percentages
Summary
Water as an abundant source of hydrogen has been a focus of interest of green energy researchers. With the high rate of photo-generation of hydrated electrons in homogenous solutions, it is pos-. Metal-Oxide Semiconductors sible that hydrogen can be generated heterogeneously and homogeneously by the photolysis of colloidal particles suspended in Ferro-cyanide solutions at room temperature. We highlight the preparation of TiO2/ V2O5 and the effects that the percentage of V2O5 may cause on the growth and orientation of each oxide in their common crystal structure and on the rate of hydrogen production during the photolysis process using visible light photons. The possibility of using these systems in a solar energy-based photolysis cell that achieve the goal of reversible, cyclic, and efficient process for hydrogen production is explored
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