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Research Article

Sn/Sn3O4-x Heterostructure Rich in Oxygen Vacancy with Enhanced Visible Light Photocatalytic Oxidation Performance

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  • Received: 20 April 2020Revised: 24 June 2020Accepted: 30 June 2020Available online: 2 July 2020
  • Sn3O4, as a typical two-dimensional semiconductor photocatalyst, can absorb visible light. However, owing to its rapid recombination of photogenerated electron-hole pairs, it is not high enough for practical application. In this work, a Sn nanoparticles/Sn3O4-x nanosheets heterostructure was prepared by in-situ reduction of Sn3O4 under H2 atmosphere. The Schottky junction formed between Sn and Sn3O4-x can enhance the photogenerated carrier separation ability. And during the hydrogenation process, a portion of the oxygen in the semiconductor can be carried away by hydrogen to form water, resulting in an increasing in oxygen vacancies in the semiconductor. The heterostructure showed clear abilities for the removal of Rhodamine B. At the same time, the cell cytocompatibility experiments proved that Sn/Sn3O4-x can significantly enhance cell compatibility and reduce the harm to organisms. Our work provides a new train for fabrication of Schottky junction composite photocatalyst rich in oxygen vacancies with enhanced photocatalytic performance.
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Sn/Sn3O4-x Heterostructure Rich in Oxygen Vacancy with Enhanced Visible Light Photocatalytic Oxidation Performance

  • Corresponding authors:

    Na Ren    E-mail: bio_renn@ujn.edu.cn

    Ya-wei Lv    E-mail: lyyawei@hnu.edu.cn

    Xin Yu    E-mail: ifc_yux@ujn.edu.cn

  • 1. Institute for Advanced Interdisciplinary Research (IAIR), University of Jinan, Jinan, 250022, China
  • 2. School of physics and electronics, Hunan University, Changsha, 410082, China
  • 3. Institute Charles Gerhardt, UMR 5253, CNRS-UM-ENSCM, Université de Montpellier, Place Eugène Bataillon, F-34095 Montpellier cedex 5, France

Abstract: Sn3O4, as a typical two-dimensional semiconductor photocatalyst, can absorb visible light. However, owing to its rapid recombination of photogenerated electron-hole pairs, it is not high enough for practical application. In this work, a Sn nanoparticles/Sn3O4-x nanosheets heterostructure was prepared by in-situ reduction of Sn3O4 under H2 atmosphere. The Schottky junction formed between Sn and Sn3O4-x can enhance the photogenerated carrier separation ability. And during the hydrogenation process, a portion of the oxygen in the semiconductor can be carried away by hydrogen to form water, resulting in an increasing in oxygen vacancies in the semiconductor. The heterostructure showed clear abilities for the removal of Rhodamine B. At the same time, the cell cytocompatibility experiments proved that Sn/Sn3O4-x can significantly enhance cell compatibility and reduce the harm to organisms. Our work provides a new train for fabrication of Schottky junction composite photocatalyst rich in oxygen vacancies with enhanced photocatalytic performance.

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