Title: Synthesis of vanadium oxide/titanium dioxide nanocomposites via sonochemical and hydrothermal process and their utilisation for energy storage application

Authors: C. Kahattha; W. Techitdheera; N. Vittayakorn; W. Pecharapa

Addresses: College of Nanotechnology, King Mongkut's Institute of Technology Ladkrabang, Chalongkrung Rd., Ladkrabang, Bangkok 10520, Thailand; ThEP Center, CHE, 328 Siayuthtaya Rd., Bangkok 10400, Thailand ' Faculty of Science, School of Applied Physics, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Thailand ' College of Nanotechnology, King Mongkut's Institute of Technology Ladkrabang, Chalongkrung Rd., Ladkrabang, Bangkok 10520, Thailand; Advanced Materials Science Research Unit, Faculty of Science, Department of Chemistry, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Thailand ' College of Nanotechnology, King Mongkut's Institute of Technology Ladkrabang, Chalongkrung Rd., Ladkrabang, Bangkok 10520, Thailand; ThEP Center, CHE, 328 Siayuthtaya Rd., Bangkok 10400, Thailand

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.

Keywords: TiO2; V2O5; vanadium oxide; titanium dioxide; nanocomposites; sonochemical process; hydrothermal process; energy storage; nanoelectronics; nanotechnology; nanopowders; photoelectrons.

DOI: 10.1504/IJNT.2014.059834

International Journal of Nanotechnology, 2014 Vol.11 No.1/2/3/4, pp.333 - 344

Available online: 14 Mar 2014 *

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