Abstract:
:Ti3+ species are highly unstable in air owing to their facile oxidation into Ti4+ species, and thus they cannot concentrate in the surface layer of TiO2 but are mainly present in its bulk. We report generation of abundant and stable Ti3+ species in the surface layer of TiO2 by boron doping for efficient utilization of solar irradiation. The resultant photocatalysts (denoted as B-TiO2-x) exhibit extremely high and stable solar-driven photocatalytic activity toward hydrogen production. The origin of the solar-light activity enhancement in the B-TiO2-x photocatalysts has been thoroughly investigated by various experimental techniques and density functional theory (DFT) calculations. The unique structure invoked by presence of sufficient interstitial boron atoms can lead to substantial variations in density of states of B-TiO2-x, which not only significantly narrow the band gap of TiO2 to improve its visible-light absorption, but also promote the photogenerated electron mobility to enhance its solar-light photocatalytic activity.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Feng N,Liu F,Huang M,Zheng A,Wang Q,Chen T,Cao G,Xu J,Fan J,Deng Fdoi
10.1038/srep34765subject
Has Abstractpub_date
2016-10-06 00:00:00pages
34765issn
2045-2322pii
srep34765journal_volume
6pub_type
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