期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 22, 期 24, 页码 12116-12120出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2jm30662j
关键词
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资金
- Chinese Academy of Sciences [KJCX2.YW.M10]
The non-equilibrium quick oxidation of titanium nitride (TiN) particles is found to be capable of kinetically controlling the partial oxidation on the surface and constructing a TiOxNy@TiN core-shell structure, in which the TiOxNy shell exhibits different components (x = 0.0-2.0). The TiOxNy@TiN structure can absorb visible light and display a high photocatalytic activity for hydrogen production, without any help from noble metal co-catalysts. A hydrogen generation rate of 506 mu mol g(-1) h(-1) can be reached. The strong catalytic ability of TiOxNy@TiN can be attributed to the formation of heterojunction among the hybrid TiOxNy, which can facilitate the separation of light-induced electron-hole pairs. Furthermore, the non-equilibrium quick oxidation leads to the partial survival of electro-conductive TiN tiny crystals on the surface, which can act as co-catalysts to further improve the electron-hole separation and to catalyze hydrogen ion reduction.
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