Mn–N-codoped TiO2 nanocrystal photocatalysts responsive to visible light were synthesized for the first time by a simple hydrothermal synthesis method. X-ray powder diffraction (XRD) measurement indicated that all the photocatalysts have an anatase crystallite structure, and that increase of the doping concentration had little effect on the structure and particle size. Compared to N-doped TiO2, a shift of the absorption edge of Mn–N-codoped TiO2 to a lower energy and a stronger absorption in the visible light region were observed. The Mn–N-codoped TiO2 showed higher photocatalytic reactivity than undoped TiO2 or N-doped TiO2 for the photodegradation of rhodamine B (RhB) under visible light irradiation. The highest photocatalytic activity was achieved on 0.4 mol% Mn–N–TiO2 calcined at 673 K.
Research on Chemical Intermediates – Springer Journals
Published: Mar 4, 2010
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