共掺杂Bi2Fe4O9微晶作为高效光催化降解RhB的过氧单硫酸盐活化剂

IF 5.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2025-07-17 DOI:10.1016/j.materresbull.2025.113665

Yuanchun Li, Enrong Zhang, Lingfeng Tang, Yong Fu, Simin Yin

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引用次数: 0

摘要

采用水热法成功合成了晶面清晰的共掺杂Bi2Fe4O9 （BFCO）微晶体。系统地研究了BFCO的微观结构、磁性和光催化活性。结果表明，在Bi2Fe4O9中掺杂Co使BFCO微晶的形貌从棒状变为立方体，并在可见光下通过PMS活化诱导了RhB的高效光催化降解。BFCO-3微晶表现出最高的光催化活性，在30 min内（k = 0.137 min−1）降解了98.2%的RhB，是纯Bi2Fe4O9 （0.030 min−1）的4.6倍。结果表明，Co的掺杂使BFCO的带隙变窄（1.75 eV），光电子与空穴有效分离。BFCO中丰富的Fe2+和Ov也有助于显著的光催化PMS活化。此外，样品具有增强的铁磁性，使其在实际废水净化中具有很高的吸引力。

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Co-doped Bi2Fe4O9 microcrystals as potent peroxymonosulfate activator for efficient photocatalytic degradation of RhB

Co-doped Bi₂Fe₄O₉ (BFCO) microcrystals with well-defined facets were successfully synthesized by a facile hydrothermal method. The microstructure, magnetic and photocatalytic activity of BFCO were systematically investigated. It was found that Co doping in Bi₂Fe₄O₉ greatly varied the morphology of BFCO microcrystals from rods to cubes and induced an efficient photocatalytic degradation of RhB via PMS activation under visible light. The BFCO-3 microcrystals exhibited the highest photocatalytic activity, with 98.2 % of RhB degraded in 30 min (k = 0.137 min⁻¹), 4.6 times higher than that of pure Bi₂Fe₄O₉ (0.030 min⁻¹). It was revealed that the Co doping led to a narrowed bandgap (1.75 eV), and effective separation of photo-generated electrons and holes in BFCO. And the abundant Fe²⁺and O_v in BFCO also contributed to the remarkable photocatalytic PMS activation. Moreover, the sample possessed enhanced ferromagnetic property, making it highly attractive for magnetic recollecting in practical wastewater purification.

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.