Boosting visible light photocatalysis in BiOI/BaFe12O19 magnetic heterojunction.

Shan Feng, Taiping Xie, Deshun Kong, Fuling Yang, Tao Li, Junwei Yang, Meixin Liu, Haigang Du, Zhimin Su

Environmental science and pollution research international 2023 Mar

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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. © 2022. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

Citation

Shan Feng, Taiping Xie, Deshun Kong, Fuling Yang, Tao Li, Junwei Yang, Meixin Liu, Haigang Du, Zhimin Su. Boosting visible light photocatalysis in BiOI/BaFe12O19 magnetic heterojunction. Environmental science and pollution research international. 2023 Mar;30(11):30197-30209