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Abstract
The interaction of the implanted nitrogen and iron atoms on the anatase TiO2(101) surface was investigated by the first-principles calculations. Substitutional and interstitial configurations of Fe doping, with and without N atom, at different sites were considered. The formation energies of the cases were calculated, and the results suggested that a larger energy barrier blocked the transfer of Fe atom from the surface to body. A synergetic effect was observed taking place between the co-doped N and Fe atoms. A comprehensive analysis of electronic structure and state density revealed that the property of TiO2 changed from semiconductor to half-metallic. Finally, on the meliorated anatase TiO2 (101) surface (M-S (101)), the adsorption energies (ΔEads) of diatomic (CO), triatomic (N2O, CO2) and polyatomic (NH3 and CH4) gases were obtained and compared with the former experimental and theoretical results.
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