Preparation and performance of mesoporous TiO2 films supported on magnesium alloy Online publication date: Sat, 17-May-2014
by Yi Zhang; Caili Zhang; Zhenya Fu; Wenyuan Zhou; Chuanshuai Li
International Journal of Nanomanufacturing (IJNM), Vol. 10, No. 1/2, 2014
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.
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