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Titania (TiO2) layers consisting of anatase and rutile phases were formed on Ti-4at%Au alloy surface, using a two-step thermal oxidation method of carburization followed by air oxidation. Au from the alloy was found in the formed TiO2 layer as metallic Au nanoparticles with diameter <10nm and dissolved Au3+. The visible-light photocatalytic activity of the TiO2 layer was evaluated by the degradation...
Anatase-containing TiO2 layers were formed on commercially pure (CP) Ti and Ti–25mass%Mo (Ti–25Mo) and Ti–25mass%Nb (Ti–25Nb) alloys by two-step thermal oxidation. The first-step treatment was conducted in an Ar–1%CO atmosphere at 1073K for 3.6ks, and the second-step treatment was conducted in air at 673–1073K for 10.8ks. The second-step temperature range for anatase formation was wider in the Ti...
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