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Construction of novel ternary dual Z-scheme Ag3VO4/C3N4/reduced TiO2 composite with excellent visible-light photodegradation activity

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Abstract

A novel and highly efficient Ag3VO4/C3N4/reduced TiO2 microsphere composite was obtained through a hydrothermal and depositional process. The microstructure, individual components with different proportions, and optical properties of the ternary nanocomposites were intensively studied. The prepared ternary composites exhibited superior photocatalytic performance of degradation of methylene blue compared with single component and S1 (C3N4/reduced TiO2) binary composites, demonstrating that the introduction of Ag3VO4 into g-C3N4/r-TiO2 can effectively improve the photocatalytic activity. Recycling experiments confirmed that the nanocomposites exhibited superior cycle performance. The enhanced capability could be attributed to a synergetic effect including the formation of heterojunction, large surface area, improved light absorption, matched energy band structure, and the improved separation efficiency of photogenerated charges coming from dual Z-scheme structure. Particularly, the introduction of Ag3VO4 makes the dual Z-scheme charge transfer pathway completed with improved separation efficiency and stronger redox ability of photogenerated electrons and holes. The work provides a promising method to develop a new dual Z-scheme photocatalytic system to remove environmental pollutant.

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Acknowledgments

This work is supported by Six Talents Peak Project in Jiangsu Province (2011-ZBZZ045) and Jiangsu Province Ordinary University Graduate Student Innovation Project (KYCX18_2231).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China

    Xuehua Yan, Xiaoxue Yuan, Jinging Wang, Qiong Wang, Chen Zhou, Dongfeng Wang, Hua Tang, Jianmei Pan & Xiaonong Cheng

  2. Institute for Advanced Materials, Jiangsu University, Zhenjiang, Jiangsu, 212013, China

    Xuehua Yan

  3. Institute of Green Materials and Metallurgy, Jiangsu University, Zhenjiang, Jiangsu, 212013, China

    Xuehua Yan & Xiaonong Cheng

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  1. Xuehua Yan
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  2. Xiaoxue Yuan
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Correspondence to Xuehua Yan.

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Yan, X., Yuan, X., Wang, J. et al. Construction of novel ternary dual Z-scheme Ag3VO4/C3N4/reduced TiO2 composite with excellent visible-light photodegradation activity. Journal of Materials Research 34, 2024–2036 (2019). https://doi.org/10.1557/jmr.2019.164

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