Title: Preparation and performance of mesoporous TiO₂ films supported on magnesium alloy

Authors: Yi Zhang; Caili Zhang; Zhenya Fu; Wenyuan Zhou; Chuanshuai Li

Addresses: School of Mechanical Engineering and Automation, Beihang University, Beijing, 100191, China ' Department of Civil and Architecture Engineering, Zhongyuan University of Technology, Zhengzhou, 450007, China ' School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450002, China ' School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450002, China ' School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450002, China

Abstract: Magnesium (AZ31) alloy was employed as the carrier of mesoporous TiO₂ films catalyst. TiO₂ films were prepared by the liquid phase deposition (LPD) method. The films transform to anatase at 189°C. The anatase phase was certified by X-ray diffractometer (XRD). The surface of the films consisted of particles whose diameter was about 150 nm. There were protuberances and micropores on the particles and their size was about 10 nm. The thickness of the films was about 6 µm. The films can catalytically decompose the methylene blue under the irradiation of the visible light. The films sintered in the vacuum furnace have high photocatalysis activity compared with those sintered in the air atmosphere. The Mg and Al atoms can diffuse from the substrate to the films. The Mg2+ ionic can help to generate the cavity and the oxygen defect. The vacuum sintering condition can benefit formation of the oxygen defect. These defects enhanced the photocatalysis.

Keywords: magnesium alloys; AZ31; TiO2 films; liquid phase deposition; LPD; photocatalytic materials; doping; titania; titanium dioxide; methylene blue; vacuum sintering; thin films.

DOI: 10.1504/IJNM.2014.059002

International Journal of Nanomanufacturing, 2014 Vol.10 No.1/2, pp.110 - 119

Received: 18 Feb 2013
Accepted: 25 Mar 2013
Published online: 17 May 2014 *

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