铁基mls的氧空位工程用于快速激子解离的光催化

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology Pub Date : 2025-03-15 DOI:10.1016/j.seppur.2025.132509

Minjie Yu , Yidan Luo , Zugen Liu , Guangying Shi , Mingshan Xue , Xianchuan Xie , Xibao Li

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引用次数: 0

摘要

本文成功制备了具有丰富氧空位（OVs）和Fe2+/Fe3+位的MIL-53（Fe）。经150 °C乙二醇（EG）处理后的MIL-53（Fe）表现出最佳的四环素（TC）光降解率（94.37 %）和反应速率常数（0.1111 min−1），分别为2.58（36.56 %）和22.22（0.0050 min−1）倍。EM53-150中适当浓度的OVs可有效增强激子解离，抑制光生电子-空穴对的重组，调节分子氧的活化，通过电子转移形成∙O2-∙O2-。同样，经过EG修饰的MIL-88B（Fe）和MIL-101（Fe）也提高了光降解性能。根据Fukui指数和LC-MS检测结果，提出了TC的潜在光降解途径。最后，根据能带结构和反应物质揭示了反应机理。这项工作为在铁基mil中引入OVs和Fe2+/Fe3+位点促进激子解离以降解抗生素提供了良好的前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文本刊更多论文

Oxygen-vacancy engineering on Fe-based MILs for efficient photocatalysis with rapid exciton dissociation

In this work, MIL-53(Fe) with abundant oxygen vacancies (OVs) and Fe²⁺/Fe³⁺ sites was successfully prepared by solvothermal treatment. The MIL-53(Fe) after the ethylene glycol (EG) treatment at 150 °C (EM53-150) displayed the best tetracycline (TC) photodegradation rate (94.37%) and reaction rate constant (0.1111 min^-¹), which were 2.58 (36.56%) and 22.22 (0.0050 min^-¹) times for MIL-53(Fe), respectively. The appropriate concentration of OVs in EM53-150 can effectively enhance exciton dissociation, inhibit the recombination of photogenerated electron-hole pairs, and regulate the activation of molecular oxygen to form

∙ O_{2}^{-}

through electron transfer. Similarly, the MIL-88B(Fe) and MIL-101(Fe) modified by EG also improved the photodegradation performance. The potential photodegradation pathways of TC were proposed depending on the Fukui index and the detection results of LC-MS. Finally, the mechanism was revealed based on band structures and reactive species. This work provided favorable prospects for the introduction of OVs and Fe²⁺/Fe³⁺ sites in Fe-based MILs for boosting exciton dissociation to degrade antibiotics.

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来源期刊

Separation and Purification Technology 工程技术-工程：化工

CiteScore

14.00

自引率

12.80%

发文量

2347

审稿时长

43 days

期刊介绍： Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.