Enhanced Photocatalytic Degradation of Chlorsulfuron by MoS2/MIL101(Fe) S-Scheme Heterojunction: A Conversion Mechanism Dominated by Electrons and Long-Lifetime Reactive Species

IF 13 2区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Small Pub Date : 2025-01-26 DOI:10.1002/smll.202412019

Bingkun Liu, Weijun Tian, Zhiyang Lu, Bingjie Huo, Jing Zhao, Mengyuan Zou, Meile Chu

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引用次数: 0

Abstract

Altering the generation route of reactive species is a potent means to augment the photocatalytic activity. In this study, MoS₂/MIL-101(Fe) S-scheme heterojunction (MF2) is prepared using a water/solvent thermal method for photocatalytic degradation of chlorsulfuron. Driven by the internal electric field, the local electron density of MF2 is redistributed, thus enhancing the adsorption of O₂. This promoted charge transfer to generate e⁻, •

O_{2}^{-} ${\mathrm{O}}_{\mathrm{2}}^ - $

, and H₂O₂ for efficient oxidation of chlorsulfuron. It is confirmed that photogenerated electrons and long-lifetime reactive species (•

O_{2}^{-} ${\mathrm{O}}_{\mathrm{2}}^ - $

and H₂O₂) played a major role. The degradation activity of MF2 for chlorsulfuron is much higher than MoS₂ (42.21 times) and MIL-101(Fe) (4.06 times). The charge transfer mechanism of the MF2 S-scheme heterojunction is verified by experimental studies and Density Functional Theory simulation calculations. In addition, MF2 exhibited great potential for practical applications. This work provided new insights into the construction of S-scheme heterojunctions and long-lifetime reactive species-dominated conversion mechanisms.

Abstract Image

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改变活性物种的生成途径是提高光催化活性的有效手段。本研究采用水/溶剂热法制备了 MoS2/MIL-101(Fe)S-scheme异质结（MF2），用于光催化降解氯磺隆。在内部电场的驱动下，MF2 的局部电子密度重新分布，从而增强了对 O2 的吸附。这促进了电荷转移，生成 e-、-O2-$\{mathrm{O}}_{mathrm{2}}^ - $ 和 H2O2，从而高效氧化氯磺隆。研究证实，光生电子和长寿命活性物种（-O2-$\{mathrm{O}}_{\mathrm{2}}^ - $ 和 H2O2）发挥了主要作用。MF2 对氯磺隆的降解活性远高于 MoS2（42.21 倍）和 MIL-101(Fe)（4.06 倍）。实验研究和密度泛函理论模拟计算验证了 MF2 S 型异质结的电荷转移机制。此外，MF2 在实际应用中表现出巨大的潜力。这项工作为 S 型异质结的构建和长寿命活性物种主导的转换机制提供了新的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Small 工程技术-材料科学：综合

CiteScore

17.70

自引率

3.80%

发文量

1830

审稿时长

2.1 months

期刊介绍： Small serves as an exceptional platform for both experimental and theoretical studies in fundamental and applied interdisciplinary research at the nano- and microscale. The journal offers a compelling mix of peer-reviewed Research Articles, Reviews, Perspectives, and Comments. With a remarkable 2022 Journal Impact Factor of 13.3 (Journal Citation Reports from Clarivate Analytics, 2023), Small remains among the top multidisciplinary journals, covering a wide range of topics at the interface of materials science, chemistry, physics, engineering, medicine, and biology. Small's readership includes biochemists, biologists, biomedical scientists, chemists, engineers, information technologists, materials scientists, physicists, and theoreticians alike.