Title: Solvothermal synthesis and photocatalytic activity of Co-doped TiO₂ nanowires

Authors: Nguyen Thi Quynh Hoa

Addresses: Department of Electronics and Telecommunications, Vinh University, 182 Le Duan, Vinh, Vietnam

Abstract: Co-doped TiO₂ nanowires with doping concentrations ranging from 0 at.% to 5 at.% were synthesised by a simple and low cost solvothermal method and their photocatalytic activities were investigated. The nanowires had a single-crystalline structure and grew along the <001> zone-axis rutile phase. The Co-doped TiO₂ nanowires showed a significantly enhanced photocatalytic activity under both UV and visible light irradiation compared to the undoped TiO₂ nanowires. This result can be attributed to the reduced bandgap energy and the inhibited charge recombination due to the incorporation of Co into TiO₂ matrix. Both UV and visible light photocatalytic efficiency shows a maximum at a Co doping concentration of 2 at.%.

Keywords: TiO2 nanowires; nanostructures; photocatalysis; solvothermal synthesis; titania; nanotechnology; cobalt doping; bandgap energy; inhibited charge recombination.

DOI: 10.1504/IJNT.2015.067900

International Journal of Nanotechnology, 2015 Vol.12 No.5/6/7, pp.426 - 433

Published online: 08 Mar 2015 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article