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Fabrication and Characterization of BaMoO4-Coupled CaWO4 Heterojunction Micro/Nanocomposites with Enhanced Photocatalytic Activity Towards MB and CIP Degradation

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Abstract

The polyacrylamide gel method combined with low- temperature calcination technology (PGMCLCT) have been successfully used to synthesize BaMoO4-coupled CaWO4 heterojunction micro/nanocomposites (BCCHMNs) with excellent photoluminescence properties and enhanced photocatalytic activity towards methylene blue (MB) and ciprofloxacin (CIP) degradation. The photoluminescent properties and photocatalytic activity of BCCHMNs strongly depend on the special interfacial contact between BaMoO4 and CaWO4. Phase structure, functional group, oxidation state, and microstructure analysis confirm that the BCCHMNs contains only BaMoO4 and CaWO4 phases, without any other impurities, and that the interface between BaMoO4 and CaWO4 forms a type II band arrangement heterojunction. The BaMoO4/10 wt% CaWO4 heterojunction micro/nanocomposites exhibit two obvious emission peaks at 470 and 490 nm under the excitation wavelength of 311 nm. The BaMoO4/15 wt% CaWO4 heterojunction micro/nanocomposites exhibit highest photocatalytic activity of about 95.433% for the degradation of MB and 97.886% for the degradation of CIP, due to the high charge transfer and separation efficiency, and optimal initial dye or CIP concentration and photocatalyst content are 20 mg/L and 1 g/L, respectively. With the increase of CaWO4 mass percentage, the photoluminescence and photocatalysis of BCCHMNs showed an opposite trend. The dependence of photoluminescence and photocatalysis on special interface contact and adsorbed oxygen provides an idea to study other types of metal oxide heterojunctions for the degradation of antibiotics.

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Data Availability

The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.

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Acknowledgments

This work was supported by the NSAF joint Foundation of China (U2030116), the National Natural Science Foundation of China (12075215), the Chongqing Key Laboratory of Geological Environment Monitoring and Disaster Early-warning in Three Gorges Reservoir Area (No. ZD2020A0401), the Talent Introduction Project (09924601) of Chongqing Three Gorges University, the Science and Technology Research Program of Chongqing Education Commission of China (KJZD-K202001202) and the Scientific Research Fund of Sichuan Provincial Science and Technology Department (2020YJ0137, 2020YFG0467).

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Authors and Affiliations

  1. State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou, 730050, China

    Huajing Gao & Hua Yang

  2. School of Electronic and Information Engineering, Chongqing Three Gorges University, Chongqing, 404000, Wanzhou, China

    Huajing Gao, Shifa Wang & Yue Wang

  3. Chongqing Key Laboratory of Geological Environment Monitoring and Disaster Early-warning in Three Gorges Reservoir Area, Chongqing Three Gorges University, Chongqing, 404000, Wanzhou, China

    Huajing Gao & Shifa Wang

  4. School of Science, Lanzhou University of Technology, Lanzhou, 730050, China

    Hua Yang

  5. Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Sichuan, 621900, Mianyang, China

    Leiming Fang & Xiping Chen

  6. Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology, Mianyang, 621010, China

    Zao Yi

  7. School of Science, Chongqing University of Posts and Telecommunications, Nan‘an District, Chongqing, 400065, China

    Dengfeng Li

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  1. Huajing Gao
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Contributions

HG, YW: Experimental analysis and theoretical research, Supervision. SW, HY, LF, DL: Supervision. XC, ZY: Writing – review and editing.

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Correspondence to Shifa Wang, Hua Yang or Dengfeng Li.

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Gao, H., Wang, S., Wang, Y. et al. Fabrication and Characterization of BaMoO4-Coupled CaWO4 Heterojunction Micro/Nanocomposites with Enhanced Photocatalytic Activity Towards MB and CIP Degradation. J. Electron. Mater. 51, 5230–5245 (2022). https://doi.org/10.1007/s11664-022-09769-3

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