FeS2/SiO2 mesoporous hollow spheres formation and catalytic properties in the Fenton reaction

Xing, Huaizhong; Wei, Jing-Ying; Jiang, Xiaolei; Nan, Zhaodong

doi:10.1016/j.matlet.2020.128408

Cited by 5 publications

(1 citation statement)

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“…Characteristic peaks at 1570 and 1393 cm −1 are due to carboxylate vibration. The characteristic absorption bands at 1090 cm −1 and 796 cm −1 can be attributed to the asymmetric stretching vibration and symmetric stretching vibration of the Si-O-Si bond [ 38 ], respectively. The stretching vibration of Fe-O corresponds to 542 cm −1 , while the characteristic peak at 569 cm −1 belongs to the Cu-O stretching vibration mode [ 21 ].…”

Section: Resultsmentioning

confidence: 99%

Degradation of Tetracycline Hydrochloride by Cu-Doped MIL-101(Fe) Loaded Diatomite Heterogeneous Fenton Catalyst

Cui

Kong

et al. 2022

Nanomaterials

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In this work, the combination of high surface area diatomite with Fe and Cu bimetallic MOF material catalysts (Fe0.25Cu0.75(BDC)@DE) were synthesized by traditional solvothermal method, and exhibited efficient degradation performance to tetracycline hydrochloride (TC). The degradation results showed: Within 120 min, about 93% of TC was degraded under the optimal conditions. From the physical–chemical characterization, it can be seen that Fe and Cu play crucial roles in the reduction of Fe3+ because of their synergistic effect. The synergistic effect can not only increase the generation of hydroxyl radicals (•OH), but also improve the degradation efficiency of TC. The Lewis acid property of Cu achieved the pH range of reaction system has been expanded, and it made the material degrade well under both neutral and acidic conditions. Loading into diatomite can reduce agglomeration and metal ion leaching, thus the novel catalysts exhibited low metal ion leaching. This catalyst has good structural stability, and less loss of performance after five reaction cycles, and the degradation efficiency of the material still reached 81.8%. High performance liquid chromatography–mass spectrometry was used to analyze the degradation intermediates of TC, it provided a deep insight of the mechanism and degradation pathway of TC by bimetallic MOFs. This allows us to gain a deeper understanding of the catalytic mechanism and degradation pathway of TC degradation by bimetallic MOFS catalysts. This work has not only achieved important progress in developing high-performance catalysts for TC degradation, but has also provided useful information for the development of MOF-based catalysts for rapid environmental remediation.

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Section: Resultsmentioning

confidence: 99%