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Creation of Oxygen Vacancies in MoO3/SiO2 by Thermal Decomposition of Pre-Impregnated Citric Acid Under N2 and Their Positive Role in Oxidative Desulfurization of Dibenzothiophene

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Abstract

The XPS, XANES, and UV–Vis results revealed that oxygen vacancies were formed in the surface of MoO3/SiO2 by impregnation of the catalyst with citric acid followed by a temperature-programmed heating under N2 atmosphere. The presence of the induction period during the oxidative desulfurization (ODS) of dibenzothiophene over these Mo-based catalysts using cumene hydroperoxide as the oxidant suggests that the reaction would follow a free radical mechanism. Both the higher ODS activity and the faster deactivation of the modified catalysts give evidences that the oxygen vacancies should possess a high ODS activity.

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Acknowledgments

This research was financially supported by the Natural Science Foundation of China (20773020, 20973030, 21073022, 21173033, and U1162203), the “863” project (2008AA030803), the NCET, the Fundamental Research Funds for the Central Universities (DUT13LK18), the Ph.D. Programs Foundation (MOE, 20100041110016), and the “111” project.

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Authors and Affiliations

  1. State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, No. 2 Linggong Road, Dalian, 116024, People’s Republic of China

    Xiang Li, Anjie Wang & Yongying Chen

  2. Liaoning Key Laboratory of Petrochemical Technology and Equipments, Dalian University of Technology, No. 2 Linggong Road, Dalian, 116024, People’s Republic of China

    Xiang Li, Luda Liu, Anjie Wang, Mengyan Wang, Yao Wang & Yongying Chen

  3. Penn State and Dalian University of Technology Joint Center for Energy Research (JCER), Dalian University of Technology, No. 2 Linggong Road, Dalian, 116024, People’s Republic of China

    Xiang Li, Anjie Wang & Yao Wang

Authors
  1. Xiang Li
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  2. Luda Liu
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  3. Anjie Wang
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  4. Mengyan Wang
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  5. Yao Wang
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Correspondence to Anjie Wang.

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Li, X., Liu, L., Wang, A. et al. Creation of Oxygen Vacancies in MoO3/SiO2 by Thermal Decomposition of Pre-Impregnated Citric Acid Under N2 and Their Positive Role in Oxidative Desulfurization of Dibenzothiophene. Catal Lett 144, 531–537 (2014). https://doi.org/10.1007/s10562-013-1141-0

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  • DOI: https://doi.org/10.1007/s10562-013-1141-0

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