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Microwave-tailored S-scheme MOF@MOF heterojunctions: Synergistic dual-charge transfer and polarization enhancement toward efficient antibiotic

文献类型： 外文期刊

作者： Niu, Jiliang 1 ; Lin, Yuetong 1 ; Yin, Mianmian 1 ; Mai, Kaiting 1 ; Qiu, Cheng 2 ; Gao, Minling 1 ;

作者机构： 1.Shantou Univ, Dept Mat & Environm Engn, Shantou 515063, Peoples R China

2.Xizang Acad Agr & Anim Husb Sci, Inst Agr Resources & Environm, Lhasa 850032, Xizang, Peoples R China

关键词： MOF@MOF; S -scheme; LMCT; PHIBiM-CT; Built-in electric fields

期刊名称：CHEMICAL ENGINEERING JOURNAL （ 影响因子：13.2； 五年影响因子：13.5 ）

ISSN： 1385-8947

年卷期： 2025 年 523 卷

页码：

收录情况： SCI

摘要： The construction of MOF@MOF heterojunctions offers significant potential for enhancing the photocatalytic performance of MOFs by leveraging charge transfer mechanisms and interface effects. In this work, we report an efficient microwave-assisted solvothermal synthesis of an S-scheme CF@MIL@Fe0.5Mn0.5MOF heteroarchitecture via in situ crystallization on carbon felt (CF). Advanced in situ spectroscopy combined with density functional theory (DFT) simulations indicates that interfacial ligand-metal charge transfer (LMCT) and photoinduced bimetallic charge transfer (PHIBiM-CT) collaboratively establish a cascaded polarization amplification mechanism between MIL101 and Fe0.5Mn0.5MOF. This engineered interface contributes to an enhanced built-in electric field (BIEF), facilitating directional charge separation through Schottky barrier modulation. The resulting heterojunction demonstrates notably high photocatalytic efficiency, achieving 98.7 % degradation of CFX within 60 min, which is associated with its hierarchical nanosheet morphology and interfacial electron reservoir effect. This work provides a systematic approach for analyzing interfacial charge dynamics in MOF@MOF heterostructures and explores microwave-assisted topological engineering as a potentially useful route for the controlled fabrication of heterojunctions with atomic-level interface precision.

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