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• W2322743310 abstract "The general low quantum efficiency of semiconductor-based photocatalysts significantly limits their large-scale application. Here, we reveal the potential role that surface distortion can play in enhancing the photocatalytic quantum efficiency as well as the underlying mechanism by using TiO2 as a model photocatalyst. Specifically, proper surface distortion in a {101} surface can significantly promote the participation of electrons in photocatalytic reactions and further facilitate the transfer of photogenerated electrons in the bulk region to this surface. Moreover, surface distortion also prevents the photogenerated holes from transferring to the surface layer, thus separating the photogenerated holes from electrons and reducing the high recombination rate of carriers, which is believed to result in the generally low photocatalytic activities of the {101} surface. For the {001} surface, the distorted surface greatly promotes the transfer of electrons from the subsurface atomic layer (the initial electron trapping sites) to the outermost atomic layer (where photocatalytic reactions generally occur) by eliminating the original energy barrier, and the trapping of electrons on surface Ti5c dz2 orbital cannot only facilitate their participation in the photocatalytic reactions but also significantly reduce the carrier recombination rate in the surface region. The results presented here can be used to account for the experimental results that surface distortion in TiO2 can substantially improve the quantum efficiency of its intrinsic absorption." @default.
• W2322743310 created "2016-06-24" @default.
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• W2322743310 date "2013-11-12" @default.
• W2322743310 modified "2023-09-25" @default.
• W2322743310 title "Insights into the Role of Surface Distortion in Promoting the Separation and Transfer of Photogenerated Carriers in Anatase TiO₂" @default.
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• W2322743310 doi "https://doi.org/10.1021/jp4092706" @default.
• W2322743310 hasPublicationYear "2013" @default.
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