Vacuum-activated method was used to prepare Co2+ and Ti3+ co-modified TiO2 with the intention of enhancing visible light photo-catalytic performance, by expanding the visible light absorption and improving the quantum efficiency of the photo-catalytic reaction. The prepared co-modified catalysts were characterized by XRD, UV-DRS, XPS, EPR, etc. The characterization results indicate that the catalysts have a typical anatase crystalline form, and that some Co2+ are incorporated on the surface of TiO2, leading to the formation of Ti3+ and oxygen vacancies. The impurity levels induced by Co2+ and Ti3+ doping are the reason for the enhanced visible light absorption, and the synergistic effect of cobalt, Ti3+ and oxygen vacancies is responsible for the improvement of photo-catalytic activity.
Research on Chemical Intermediates – Springer Journals
Published: Aug 30, 2015
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