期刊
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
卷 658, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.colsurfa.2022.130701
关键词
Fenton -like; Fe-MOFs; Fe and Cu Bimetallic MOFs; Substituent; Phenol
Researchers have successfully prepared bromine-functionalized bimetallic MOFs-FeCu(BDC-Br), which effectively degrades phenol in a Fenton-like process. The catalyst achieved a higher phenol degradation rate at a low dose. The effects of pH, humic acid, and coexisting ions on phenol degradation were examined.
Fe-based metal-organic frameworks (Fe-MOFs) have been widely used in heterogeneous Fenton-like processes. However, the catalytic performance of Fe-MOFs is limited by the relatively slow Fe (III)/Fe (II) redox cycle. For Fe-MOFs, increasing the interfacial electron transfer and reducing the electron density of Fe-MOFs are expected to accelerate the reduction of Fe (III) and improve the catalytic performance. Here, by mixing Fe/Cu metal species and introducing bromine groups, we successfully prepared bromine-functionalized bimetallic MOFs-FeCu(BDC-Br), and we used it to effectively degrade phenol in a Fenton-like process. Compared with most other catalysts, FeCu(BDC-Br) achieved a higher phenol degradation kinetic rate of 0.106 min-1 at a low dose. Effects of pH, humic acid (HA) and coexisting ions on the degradation of phenol were examined. The FeCu(BDCBr) /H2O2 system can remove phenol in the near neutral pH range of 4-6 and 0-50 mg/L HA range. Chloride ion, sulfate, or phosphate with a concentration of 100 mg/L showed an inhibitory effect on the catalytical performance of phenol degradation. This work provides insights for the preparation of Fe-MOFs Fenton-like catalyst in water/wastewater treatment.
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