Synthesis of vanadium oxide/titanium dioxide nanocomposites via sonochemical and hydrothermal process and their utilisation for energy storage application
by C. Kahattha; W. Techitdheera; N. Vittayakorn; W. Pecharapa
International Journal of Nanotechnology (IJNT), Vol. 11, No. 1/2/3/4, 2014

Abstract: This work focuses on the synthesis of V₂O₅/TiO₂nanocomposites by sonochemical and hydrothermal process. First, titanium dioxide (TiO₂) nanopowders were synthesised by sonochemical process using titanium isopropoxide as a titanium source. Meanwhile, hydrothermal process was employed to modify the structure of commercial V₂O₅ powder to be nanorod-like structure V₂O₅ to increase its specific surface area. Structural and morphological properties of the composites were characterised by X-ray diffraction, scanning electron microscope and transmission electron microscope. The XRD results indicate that the crystallisation of the composite corresponds to anatase and orthorhombic structures of TiO₂ and V₂O₅, respectively. The significant variation of charge storage properties of the composites under ultraviolet irradiation was obtained by varying V₂O₅ content in the composite. Results suggest that V₂O₅ loaded into the nanocomposite plays a key role as a storage material of photoelectrons generated by TiO₂ illuminated by ultraviolet irradiation.

Online publication date: Sat, 15-Nov-2014

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