Abstract
A novel N-doped TiO 2 with high visible light photocatalytic activity was obtained by treating nanotube titanic acid (NTA) in NH 3 flow and investigated by means of XRD, TEM, ESR and XPS. The ESR results revealed that the visible light photocatalytic activity is originated from N-doping into TiO 2 with the forming of triplet paramagnetic species, the higher triplet paramagnetic species concentration, the better visible light photocatalytic behavior.
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