The Interface Reaction between an Ag+-Doped TiO2 Film and Stainless Steel Substrate


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Ag+-doped TiO2 films on stainless steel were prepared by a sol-gel method and their microstructures and compositions were studied with X-Ray Diffractometer, Scanning Electron Microscope (SEM) and X-ray Photoelectron Spectroscopy. It was shown that Fe atoms in untreated stainless steel react with Ag+ in the TiO2 film and form FeTiO3, which has an acicular crystal form under SEM observation. As a result, Ag+ in the film is reduced to the silver atom, which degrades the antibacterial property of the film. However, after an oxidization of the substrate, a layer of ferric oxide is formed, which reacts with Fe atoms that would otherwise react with and reduce Ag+, and then forms FeTiO3. Thus, the penetration of Fe atoms is stopped and Ag+ in the anatase-structure TiO2 film is protected from the reduction, which enhanced antibacterial property of the film.



Key Engineering Materials (Volumes 336-338)

Edited by:

Wei Pan and Jianghong Gong






X. G. Ding et al., "The Interface Reaction between an Ag+-Doped TiO2 Film and Stainless Steel Substrate", Key Engineering Materials, Vols. 336-338, pp. 1559-1562, 2007

Online since:

April 2007




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