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Vacuum-activated Co2+ and Ti3+ co-modified TiO2 with stable and enhanced photocatalytic activity

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Abstract

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.

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Acknowledgments

This work has been supported by National Nature Science Foundation of China (21203062, 21377038, 21173077, 21237003, 21577036), the National Basic Research Program of China (973 Program, 2013CB632403), the Research Fund for the Doctoral Program of Higher Education (20120074130001), the Fundamental Research Funds for the Central Universities (22A201514021), and sponsored by the “Chenguang Program,” supported by the Shanghai Education Development Foundation and Shanghai Municipal Education Commission (14CG30).

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    1. Key Lab for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, People’s Republic of China

      Haibei Liu, Bin Shen, Mingyang Xing, Jinlong Zhang & Baozhu Tian

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    1. Haibei Liu
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    2. Bin Shen
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    3. Mingyang Xing
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    4. Jinlong Zhang
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    5. Baozhu Tian
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    Correspondence to Mingyang Xing or Jinlong Zhang.

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    The authors declare that they have no conflict of interest. The Research described in this paper did not involve human participants and/or animals.

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    Haibei Liu and Bin Shen have contributed equally to this work.

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    Liu, H., Shen, B., Xing, M. et al. Vacuum-activated Co2+ and Ti3+ co-modified TiO2 with stable and enhanced photocatalytic activity. Res Chem Intermed 42, 3459–3471 (2016). https://doi.org/10.1007/s11164-015-2225-9

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