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Synthesis of Ag2CrO4/SnO2 n–n type heterojunction as a visible light photocatalyst for degradation of rhodamine B

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Abstract

The Ag2CrO4/SnO2 n–n type heterojunction has been fabricated by coupling Ag2CrO4 particles with SnO2 nanorods via an in situ synthetic method. The photocatalytic degradation mechanism of the as-prepared heterojunction has also been discussed. Characterization results revealed that the as-fabricated Ag2CrO4/SnO2 composites could reinforce the photo-degradation competencies for rhodamine B dilute solution compared to pure Ag2CrO4 and SnO2 samples. As the increase in the molar ratios of Ag2CrO4–SnO2, the photocatalytic degradation efficiency appeared to the tendency of first increasing and then decreasing. When it was 4:10, in 90 min, the as-obtained samples possessed the vintage photocatalytic degradation efficiency of 95.8% among of pure SnO2, Ag2CrO4 and the as-prepared composites with various molar ratios, respectively. Furthermore, the Ag2CrO4 and SnO2 were connected via chemical bonds to form the homogenous heterojunction. It could boost the separation and transfer of the photogenerated holes and electrons. In addition, the holes, hydroxyl and superoxide radicals played a major role during the photodegradation process.

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Acknowledgements

This work was supported by the Natural Science Foundation of Hebei Province, China (Grant No. B2016210111).

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Author notes

  1. Xiang-Feng Wu and Chen-Xu Zhang contributed equally to this work and share the first authorship.

Authors and Affiliations

  1. School of Materials Science and Engineering, Hebei Provincial Key Laboratory of Traffic Engineering Materials, Shijiazhuang Tiedao University, 17 Northeast, Second Inner Ring, Shijiazhuang, 050043, China

    Xiang-Feng Wu, Chen-Xu Zhang, Yu-Duan Wang, Jun-Zhang Su, Jia-Rui Zhang, Yan-Mei Feng, Mi Zhang, Xin Tong, Wei-Guang Zhang & Xiu-Guo Sun

  2. School of Science, North University of China, Taiyuan, 030051, China

    Yan-Mei Feng

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  1. Xiang-Feng Wu
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Correspondence to Xiang-Feng Wu or Xiu-Guo Sun.

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Wu, XF., Zhang, CX., Wang, YD. et al. Synthesis of Ag2CrO4/SnO2 n–n type heterojunction as a visible light photocatalyst for degradation of rhodamine B. J Mater Sci: Mater Electron 29, 20959–20967 (2018). https://doi.org/10.1007/s10854-018-0240-5

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