Constructing dual sulfite-mediated processes via inner-sphere complexation and photogenerated carrier modulation with Hematite/Fe2TiO5 heterojunction for ofloxacin degradation - Université Clermont Auvergne Accéder directement au contenu
Article Dans Une Revue Applied Catalysis B: Environmental Année : 2024

Constructing dual sulfite-mediated processes via inner-sphere complexation and photogenerated carrier modulation with Hematite/Fe2TiO5 heterojunction for ofloxacin degradation

Gilles Mailhot

Résumé

Hitherto, various sulfite-based advanced oxidation processes have emerged with particular vantages of low cost and potential for efficient contaminant degradation, which still requires increasing strategies for addressing its drawback. To achieve system-neutral feasibility and overcome the limitations, a metal oxide composite catalyst Hematite/Fe2TiO5 integrated with S-scheme heterojunction was constructed for ofloxacin degradation under S (IV)-visible light conditions. Impressively, the as-built system manifested significant promotion on substrate removal (more than four times the original Fe2TiO5), which indicated the accelerated inner-sphere interactions between catalyst and S(IV) with beneficial Vis contributed primarily to the degradation, demonstrating the dual sulfite-mediated effective pathway through modulated photogenerated carriers and oxy-sulfur radical chain reactions. Additionally, the interfacial enhancement by the heterojunction structure was further investigated by First-principles computation, which confirmed the mechanism of facilitated electron-hole pair separation. Overall, this work reveals the critical mechanism of Vis-induced S(IV)-AOP and provides constructive perspectives to address the limitations of conventional processes.
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hal-04646662 , version 1 (15-07-2024)

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Wenyu Wang, Juntao Guo, Yihui Zhang, Kun Lu, Jing Xu, et al.. Constructing dual sulfite-mediated processes via inner-sphere complexation and photogenerated carrier modulation with Hematite/Fe2TiO5 heterojunction for ofloxacin degradation. Applied Catalysis B: Environmental, 2024, 358, pp.124374. ⟨10.1016/j.apcatb.2024.124374⟩. ⟨hal-04646662⟩
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