4.7 Article

Persulfate activation by ferrocene-based metal-organic framework microspheres for efficient oxidation of orange acid 7

期刊

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
卷 29, 期 23, 页码 34464-34474

出版社

SPRINGER HEIDELBERG
DOI: 10.1007/s11356-022-18669-2

关键词

Metal-organic frameworks; Persulfate; Sulfate radical; Acid orange 7; Catalytic degradation; Transition metal

资金

  1. National Natural Science Foundation of China [41877132, 51578264, 51908242]

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In this study, ferrocene-based metal-organic frameworks with different transition metals were synthesized and used as catalysts for persulfate activation. The effects of catalyst dosage, persulfate concentration, and pH on the degradation of acid orange 7 were investigated. The results showed that cobalt-based ferrocenyl metal-organic framework microspheres exhibited the best catalytic performance.
Ferrocene-based metal-organic framework with different transition metals (M-Fc-MOFs, M=Fe, Mn, Co) was synthesized by a simple hydrothermal method and used as a heterogeneous catalyst for persulfate activation. The samples were characterized by X-ray diffraction, transmission electron microscopy, X-ray electron spectroscopy, cyclic voltammetry, and electrochemical impedance spectroscopy. Meanwhile, the influences of factors such as catalyst dosage, persulfate concentration, and pH on the degradation of acid orange 7 (AO7) were studied in detail. The results showed that hollow cobalt-based ferrocenyl metal-organic framework microspheres (Co-Fc-MOFs) exhibited the best catalytic performance, which is closely related to the synergy of Fc/Fc(+) and Co(II)/Co(III) cycles in persulfate activation. Free radical quenching studies indicated that both sulfate and hydroxyl appeared to contribute to the degradation of AO7.

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