Construction of Magnetic Z-Scheme P-Doped Biobr/CoFe₂O₄ Nanocomposite for Expeditious Visible Light Photocatalytic Palm Oil Mill Effluent Degradation via the Assistance of IO₄^- and S₂O₈^2-

Abstract:

P-BiOBr/CoFe₂O₄ nanocomposite was fabricated through a surfactant-free hydrothermal route and combined with electron acceptors (IO₄^- and S₂O₈^2-) for the first time to examine the palm oil mill effluent (POME) degradation and concurrently evaluated the biogas formation under visible light irradiation. The POME degradation efficiency reached 100% in 120 min over P-BiOBr/CoFe₂O₄/IO₄^-, which was much higher than the P-BiOBr/CoFe₂O₄/S₂O₈^2- (80.6%). Interestingly, the evaluation of the biogas production demonstrated that the P-BiOBr/CoFe₂O₄/IO₄^- photocatalysis generated greater amount of biogas (CH₄ + CO₂) compared to other systems. The great photocatalytic enhancement was due to the efficient charge carrier separation thanks to the Z-scheme heterojunction between P-BiOBr and CoFe₂O₄, and the electron trapping by IO₄^-. The hydroxyl radicals and photogenerated holes contributed majorly to POME degradation. Ultimately, the P-BiOBr/CoFe₂O₄ with IO₄^- and S₂O₈^2- assisting under visible light provided an effective and feasible method to degrade POME.

• Periodical: Key Engineering Materials (Volume 938)
• Pages: 163-169
• DOI: https://doi.org/10.4028/p-2yp25r
• Online since: December 2022
• Authors: Jin Chung Sin*, Sze Mun Lam, Hong Hu Zeng
• Keywords: Biogas, Nanocomposite, Palm Oil Mill Effluent, Persulfate Assisted Photocatalysis, Semiconductor

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