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• W2728006960 abstract "Abstract Ti 3+ doping in TiO 2 photocatalyst has attracted much attention due to its enhanced visible-light absorption and the decreased carrier recombination. However, the introduction of massive stable Ti 3+ is still a great challenge because Ti 3+ is easy to be oxidized in air. In this work, for the first time, a negatively charged core/shell TiO 2 /C nanostructure is prepared and then Pt 0 atoms reduced by NaBH 4 are loaded on its surface. Through a tracking test of the product’s Zeta potential, XPS and FTIR measurements, it is found that the reductive electrons are produced due to the reaction between C and metal Pt, in which Pt exhibits a +2 chemical valence. And the lost electrons by Pt are transferred into the interior TiO 2 through the carbon shell and reduce Ti 4+ to Ti 3+ . This method avoids Ti 3+ ions’ exposing to air and overcomes the complex coating process for isolating oxygen, and provides a new facile one for efficiently Ti 3+ self-doping. Through the following measurements, such as XPS, PL, EPR and Raman etc., it is proved that massive Ti 3+ ions are formed in the interior TiO 2 , which greatly narrows the composite’s band-gap (from 3.11 eV to 2.47 eV) and enhances the visible-light absorption. As a result, the as-obtained sample exhibits a larger carrier densities (13.9 × 10 18  cm −3 ) and a higher photocatalytic activity under visible-light irradiation compared with those in other literatures: the rate of photocatalytic water splitting for H 2 generation is up to 8117 μmol h −1  g −1 ." @default.
• W2728006960 created "2017-07-14" @default.
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• W2728006960 date "2017-12-01" @default.
• W2728006960 modified "2023-10-14" @default.
• W2728006960 title "Massive Ti3+ self-doped by the injected electrons from external Pt and the efficient photocatalytic hydrogen production under visible-Light" @default.
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• W2728006960 doi "https://doi.org/10.1016/j.apcatb.2017.07.014" @default.
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