Efficient Removal of Emerging Contaminant Sulfamethazine in Water by Fe2O3: Roles of Morphological Features and Oxygen Vacancies

IF 3.7 2区化学 Q2 CHEMISTRY, APPLIED

Applied Organometallic Chemistry Pub Date : 2025-02-16 DOI:10.1002/aoc.70062

Guangyu Wu, Geng Li, Jingyi Wang, Shilin Shi, Simeng Guo, Yuwei Pan, Ying Zhang, Jiangang Han, Weinan Xing

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引用次数: 0

Abstract

The inability to recycle Fenton reagents and a narrow pH range restricts hematite (Fe₂O₃) application in the actual photo-Fenton system. The engineering of surface structures is identified as an effective approach for enhancing the photo-Fenton activity of the material. In this work, three different morphologies (nanosheet, cube, and ring) Fe₂O₃ materials containing oxygen vacancies (OVs) were synthesized by hydrothermal method, and a novel system for the photo-Fenton degradation of sulfamethazine was examined. In the presence of oxalic acid, the Fe₂O₃/oxalic acid heterogeneous catalytic system demonstrated the in situ generation of H₂O₂ and facilitated Fenton-like reactions. The as-prepared nanosheet-Fe₂O₃ showed the highest photo-Fenton degradation efficiency. The free radical capture experiment was investigated by using different free radical sacrificial agents, and the results suggested that superoxide radicals were the principal active species involved. Ecotoxicity assessments utilizing toxicity prediction software assessed the reaction intermediates generated during sulfamethazine degradation via a quantitative structure–activity relationship method, indicating that these intermediates exhibited reduced developmental toxicity. The possible pathways of sulfamethazine degradation and mechanism for synergistic degradation sulfamethazine effect between Fe₂O₃ and oxalic acid were proposed. This research presents an effective strategy for the design and synthesis of Fe₂O₃ photocatalysts with various morphologies and oxygen vacancies, suitable for application in photo-Fenton catalysis and related environmental contexts.

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来源期刊

Applied Organometallic Chemistry 化学-无机化学与核化学

CiteScore

7.80

自引率

10.30%

发文量

408

审稿时长

2.2 months

期刊介绍： All new compounds should be satisfactorily identified and proof of their structure given according to generally accepted standards. Structural reports, such as papers exclusively dealing with synthesis and characterization, analytical techniques, or X-ray diffraction studies of metal-organic or organometallic compounds will not be considered. The editors reserve the right to refuse without peer review any manuscript that does not comply with the aims and scope of the journal. Applied Organometallic Chemistry publishes Full Papers, Reviews, Mini Reviews and Communications of scientific research in all areas of organometallic and metal-organic chemistry involving main group metals, transition metals, lanthanides and actinides. All contributions should contain an explicit application of novel compounds, for instance in materials science, nano science, catalysis, chemical vapour deposition, metal-mediated organic synthesis, polymers, bio-organometallics, metallo-therapy, metallo-diagnostics and medicine. Reviews of books covering aspects of the fields of focus are also published.