Full visible-light absorption of TiO^sub 2^ nanotubes induced by anionic S^sub 2^^sup 2-^ doping and their greatly enhanced photocatalytic hydrogen production abilities

TiO2, as a benchmark photocatalyst for hydrogen production through water splitting, has a relatively large band gap (3.2 eV for anatase and 3.0 eV for rutile) requiring UV light (290-400 nm) for electronic excitations from the valence band to the conduction band, hence utilizing only a small part of...

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