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Visible light photocatalytic decoloration of methylene blue on novel N-doped TiO2

DOI: 10.1007/s11434-007-0306-x

Keywords: nitrogen doped titanium dioxide,nanotube titanic acid,visible-light photocatalytic activity,oxygen vacancy

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Novel N-doped TiO2 (denoted as N-NTA600) was prepared by treating nanotube titanic acid (NTA) in NH3 flow. Its visible light photocatalytic activity, evaluated by decoloration reaction of methylene blue, is higher than that of N-P25(600) prepared by treatment of P25-TiO2 in the same condition. It is suggested that the origin of visible-light photocatalytic activity is single-electron-trapped oxygen vacancy (Vo ·) modified by chemisorbed NO.


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