Fabrication of anatase-type TiO2 films by reactive pulsed laser deposition for photocatalyst application

✍ Scribed by Yu Xu; Mingrong Shen

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 474 KB
• Volume: 202
• Category: Article
• ISSN: 0924-0136
• DOI: 10.1016/j.jmatprotec.2007.09.015

✦ Synopsis

TiO 2 films having anatase crystal structure were prepared on glass substrates by reactive pulsed laser deposition using a metallic Ti target in an O 2 gas ambient. At a fixed substrate temperature of 400 • C, the crystalline structure, surface morphology, optical properties and photocatalytic activity of the TiO 2 films were greatly affected by the O 2 gas pressure. It was found that nearly pure anatase-phase TiO 2 film can be obtained under an O 2 pressure of 15 Pa, which had smallest grain size among the films deposited under various O 2 gas pressure from 5 to 30 Pa. This film also showed good optical transmittance between the wavelength of 200 and 800 nm and high photocatalytic efficiency on the decomposition of methylene blue in aqueous solution. Discussions were given to explain the experimental phenomena.