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Boosting visible light photocatalysis in BiOI/BaFe12O19 magnetic heterojunction

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Abstract

Many previous studies have underestimated the role of magnetic components in improving photocatalytic performance. It is significance to explore the migration mechanism of photoinduced carriers in magnetic heterojunction. Here, a magnetic heterojunction, BiOI/BaFe12O19, was synthesized by a simple preparation method. The optimal synthesis conditions and photocatalytic reaction conditions were explored. The growth mechanism of bismuth iodide oxide (BiOI) was elaborated by introducing a micromagnetic field stemming from barium ferrite (BaFe12O19). The electrochemical impedance spectroscopy (EIS), Mott–Schottky curve (MS), transient fluorescence spectrometer (PL), and photocurrent response plot (i ~ t) tests indicated that the BiOI/BaFe12O19 possessed a higher transfer capacity of electrons, higher separation efficiency of photoinduced carriers, stronger photocurrent response, and higher carriers density, compared with pure BiOI. The ultraviolet–visible diffuse reflectance spectrophotometer (UV–vis DRS), electron paramagnetic resonance spectrometer (EPR), MS, and quenching experiments revealed band structure configuration and migration mechanism of photoinduced carriers. The enhancement mechanism of photocatalysis and photocatalytic reaction mechanism was clearly proclaimed in BiOI/BaFe12O19 catalytic system.

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Funding

This work was supported by the Science and Technology Fund Project of Guizhou Province (No. [2018]1415), Guizhou Province First-class Discipline (Group) Construction-Mining Engineering (No. XKTJ[2020]23), Natural Science Foundation of Chongqing (2022NSCQ-MSX1552), Science and Technology Fund Project of Guizhou Province (No. [2018]1142, No. [2019]1291), Key Laboratory of gas prevention and control in coal mines of Guizhou Province (No. KY[2019]054), Key Laboratory of coalbed methane development and utilization (No. 52020–2018-03–06), Project of Education Department of Guizhou Province (No. KY[2018]029), 2011 Collaborative Innovation Center of Guizhou Province (No. [2016]02), and Gas prevention and utilization innovation team (No.LPSSYKJTD201903).

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Authors and Affiliations

  1. School of Mining and Mechanical Engineering, Liupanshui Normal University, Liupanshui, 553004, China

    Shan Feng, Deshun Kong, Fuling Yang, Tao Li, Junwei Yang, Meixin Liu & Haigang Du

  2. Research Office, Chongqing Preschool Education College, Chongqing, 404047, China

    Taiping Xie

  3. School of Materials Science and Engineering, Yangtze Normal University, Chongqing, 408100, China

    Taiping Xie

  4. Chongqing Academy of Chinese Materia Medica, Chongqing, 400065, China

    Zhimin Su

Authors
  1. Shan Feng
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  5. Tao Li
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  7. Meixin Liu
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  8. Haigang Du
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  9. Zhimin Su
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Contributions

Shan Feng and Taiping Xie: investigation, writing—original draft, writing—review and editing, and visualization. Deshun Kong and Fuling Yang: validation and investigation. Tao Li, Junwei Yang, and Meixin Liu: validation and investigation. Taiping Xie, Haigang Du, and Zhimin Su: conceptualization, resources, writing—original draft, writing—review and editing, and supervision.

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Correspondence to Zhimin Su.

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Feng, S., Xie, T., Kong, D. et al. Boosting visible light photocatalysis in BiOI/BaFe12O19 magnetic heterojunction. Environ Sci Pollut Res 30, 30197–30209 (2023). https://doi.org/10.1007/s11356-022-24094-2

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