Preparation of Fe-carbon/nitrogen composites from Fe-MOF-74 precusor and its performance in activating peroxymonosulfate
The composite Fe-carbon/nitrogen(Fe-MOF-C/N)was prepared from the precusors of Fe-MOF-74 and g-C3N4 and its performance in activating peroxymonosulfate(PMS)was studied.The results of XRD,SEM and XPS analysis showed that Fe-MOF-C/N had a porous structure and was mainly composed of Fe3 N,C0.08 Fe1.92 and graphite.The results of using Fe-MOF-C/N to activate PMS to degrade bisphenol A(BPA)show that compared with the previous Fe-C/N-0.5:1(prepared from FeC2O4 and g-C3N4),Fe-MOF-C/N has better catalytic performance.The degradation rate of BPA by Fe-MOF-C/N/PMS under the same conditions reaches 95.21％(6 min),which is 30.4％higher than Fe-C/N-0.5:1/PMS.The chemical oxygen demand(COD)removal rate of BPA reached 59.72％within 6 min under the optimized experimental conditions.Free radical quenching experiments showed that 1 O2 was the main active species in Fe-MOF-C/N/PMS.The recycle tests indicated Fe-MOF-C/N had a good stability,the degradation rate of BPA only decreased by 9.0％in 5 runs,implying it has a good application prospect.
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