Journal
RSC ADVANCES
Volume 10, Issue 60, Pages 36363-36370Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ra07402k
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Funding
- Talent Fund of Shandong Collaborative Innovation Center of Eco-Chemical Engineering from Qingdao University of Science and Technology [XTCXQN23]
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Fe-based metal organic frameworks (Fe-MOFs) were successfully synthesized with the dielectric barrier discharge (DBD) plasma method and FeSO4 center dot 7H(2)O as the Fe precursor. Fe-MOFs were used as Fenton-like catalysts in DBD plasma/Fenton-like technology to treat wastewater, which addressed the issues with iron solubility. Since the valence state of iron will affect the catalytic performance, the Fe precursor FeSO4 center dot 7H(2)O was added to regulate the valence state and adjust the catalytic performance by improving the availability of active sites. The influences of discharge voltage, catalyst addition amount, H(2)O(2)addition amount and pH on the degradation efficiency of methyl orange (MO) were systematically examined. Through free radical capture experiments, the reaction mechanism of the plasma/Fenton-like catalytic degradation process was deduced primarily as the coordinated oxidation process of hydroxyl radicals (center dot OH), photo-generated holes (h(+)) and superoxide radicals (center dot O-2(-)). The reusability experiments proved that the catalyst was stable and reusable. The possible degradation pathways were proposed based on the identification of intermediate products generated in the degradation process by liquid chromatography-mass spectrometry (LC-MS) analyses.
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