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• W2014047721 abstract "A series of novel oxide semiconductors, 3d transition-metal doped In1−xMxTaO4 (M=Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn), were synthesized by the ceramic method, and their photocatalytic properties for H2O decomposition under visible light irradiation were examined. It was found that the photocatalytic activity of InTaO4 was significantly enhanced while In was substituted by Ni, but suppressed in most of other substitutions. Theoretical calculations indicated that under the octahedral crystal field, the M 3d electron orbitals split into the lower energy t2g and the higher energy eg parts. With increase in the atomic number of transition-metal M, the 3d energy states shift to the lower energy side. Most of these 3d orbitals hybridize with O-2p or Ta 5d orbitals, localizing the charge carriers. However, Ni 3d–eg states, which lie slightly above the O-2p orbitals, play a role in narrowing the band gap of the un-doped InTaO4 and hence significantly enhance the photocatalytic activity. The controlling factors of photocatalytic activity, such as co-catalysts, surface area, crystallinity of these oxide semiconductors were also studied. The results indicate that not only a suitable energy band structure, but also nano-structured bulk and surface properties are crucial for photocatalysis reaction." @default.
• W2014047721 created "2016-06-24" @default.
• W2014047721 creator A5018143125 @default.
• W2014047721 creator A5034469896 @default.
• W2014047721 date "2005-02-01" @default.
• W2014047721 modified "2023-09-25" @default.
• W2014047721 title "Visible light sensitive photocatalysts In1−xMxTaO4 (M=3d transition-metal) and their activity controlling factors" @default.
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• W2014047721 doi "https://doi.org/10.1016/j.jpcs.2004.06.089" @default.
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