Photocatalytic Properties of TiO2 Thin Films Prepared by Microarc Oxidation

Acta Metall Sin

2008, Vol. 44

Issue (10): 1238-1242 DOI:

Research Articles

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Photocatalytic Properties of TiO2 Thin Films Prepared by Microarc Oxidation

沈阳理工大学

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. Photocatalytic Properties of TiO2 Thin Films Prepared by Microarc Oxidation. Acta Metall Sin, 2008, 44(10): 1238-1242 .

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Abstract Titanium dioxide photocatalytic thin films were prepared using method of microarc oxidation. Aimed to improve the photocatalytic activity of the titanium dioxide photocatalytic thin films, the components of the electrolytes were changed in process of the Microarc Oxidation by adding the oxide. The results show that over 10 percent of photocatalytic degradation ratio is improved with using the doped components of V、Ag、Ce, better than that of transition elements, heavy metals and rare earths. The semiconductor doping may obviously improve the photocatalytic activity. As far as the materials of V2O5 or SnO2 are concerned, effect of the concentration on the photocatalytic activity was also investigated. The results show that the photocatalytic degradation ratio was significantly improved as the concentration of V2O5 0.5mmol or SnO2 1.0mmol. The properties and structures were investigated by means of the XRD and SEM. The thickness and surface area of the microarc oxidation coating increase, and microarc channels diameter and particle size of microarc oxidation coating decrease for the Microarc Oxidation process with the treated electrolytes. But crystal lattice structure of titanium dioxide yet remains anatase.

Key words: Microarc Oxidation titanium dioxide photocatalytic degradation doped

Received: 15 November 2007

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y2008/V44/I10/1238

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