Photocatalytic peroxymonosulfate activation system based on Fe-MOF@BiVO4 for efficient organic pollutions removal: Spatially separated active sites

IF 9.4 1区化学 Q1 CHEMISTRY, PHYSICAL

Journal of Colloid and Interface Science Pub Date : 2025-05-18 DOI:10.1016/j.jcis.2025.137917

Yaping Zhang , Yanan Zhao , Yixin Qi , Yanyan Lin , Yuhang Cheng , Mengmeng Sun , Lei Wang

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Abstract

Photogenerated holes have emerged as critical mediators for activating peroxymonosulfate (PMS) in the coupled photocatalytic PMS activation system, enabling novel dual-channel activation pathway. A tandem system based on Fe-MOF@BiVO₄ (Vis/PMS/Fe-MOF@BVO) with spatially separated active sites was constructed to form a dual-channel activation mechanism. The BiVO₄ (010) face provides the active sites for photogenerated electrons to drive the Fe³⁺/Fe²⁺ cycle and activate PMS, while the BiVO₄ (110) face serves as the active sites for photogenerated holes to activate PMS. Consequently, the Vis/PMS/Fe-MOF@BVO system achieved complete degradation of 10 mg/L BPA within 6 min, with a degradation rate constant (K_obs) of 0.74 min⁻¹. It also demonstrated high removal efficiency for various organic pollutants with excellent immunity to interference and reusability. This work provides a new insight into the coordinative mechanism for coupled photocatalysis and PMS activation system.

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基于Fe-MOF@BiVO4的高效有机污染去除光催化过氧单硫酸盐活化体系：空间分离的活性位点

在耦合光催化PMS活化体系中，光生孔作为活化过氧单硫酸盐（PMS）的关键介质，实现了新的双通道活化途径。构建了以Fe-MOF@BiVO4 （Vis/PMS/Fe-MOF@BVO）为载体，活性位点空间分离的串联体系，形成双通道活化机制。BiVO4（010）面为光生电子提供驱动Fe3+/Fe2+循环并激活PMS的活性位点，而BiVO4（110）面为光生空穴提供激活PMS的活性位点。因此，Vis/PMS/Fe-MOF@BVO系统在6分钟内完全降解了10 mg/L的BPA，降解速率常数（Kobs）为0.74 min−1。对多种有机污染物的去除率高，具有良好的抗干扰性和可重复使用性。这项工作为光催化与PMS耦合活化体系的协调机制提供了新的认识。

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来源期刊

Journal of Colloid and Interface Science 化学-物理化学

CiteScore

16.10

自引率

7.10%

发文量

2568

审稿时长

2 months

期刊介绍： The Journal of Colloid and Interface Science publishes original research findings on the fundamental principles of colloid and interface science, as well as innovative applications in various fields. The criteria for publication include impact, quality, novelty, and originality. Emphasis: The journal emphasizes fundamental scientific innovation within the following categories: A.Colloidal Materials and Nanomaterials B.Soft Colloidal and Self-Assembly Systems C.Adsorption, Catalysis, and Electrochemistry D.Interfacial Processes, Capillarity, and Wetting E.Biomaterials and Nanomedicine F.Energy Conversion and Storage, and Environmental Technologies