Nanoscale zerovalent iron(nZVI)has garnered significant attention as an efficient advanced oxidation activator,but its practical application is hindered by aggregation and oxidation.Coating nZVI with carbon can effect...Nanoscale zerovalent iron(nZVI)has garnered significant attention as an efficient advanced oxidation activator,but its practical application is hindered by aggregation and oxidation.Coating nZVI with carbon can effectively addresses these issues.A simple and scalable production method for carbon-coated nZVI composite is highly desirable.The anti-oxidation and catalytic performance of carbon-coated nZVI composite merit in-depth research.In this study,a highly stable carbon-coated core-shell nZVI composite(Fe0@RF-C)was successfully prepared using a simple method combining phenolic resin embedding and carbothermal reduction.Fe0@RF-C was employed as a heterogeneous persulfate(PS)activator for degrading 2,4-dihydroxybenzophenone(BP-1),an emerging contaminant.Compared to commercial nZVI,Fe0@RF-C exhibited superior PS activation performance and oxidation resistance.Nearly 95%of BP-1 was removed within 10 min in the Fe0@RF-C/PS system.The carbon layer promotes the enrichment of BP-1 and accelerates its degradation through singlet oxygen oxidation and direct electron transfer processes.This study provides a straightforward approach for designing highly stable carbon-coated nZVI composite and elucidates the enhanced catalytic performance mechanism by carbon layers.展开更多
基金National Natural Science Foundation of China(52070094)project entrusted by Nanjing University&Yancheng Academy of Environment Protection Technology and Engineering(HX202112220004)First-class undergraduate course construction project and Student Innovation and Entrepreneurship Training program of Nanchang University(202210403102 and S202210403083).
文摘Nanoscale zerovalent iron(nZVI)has garnered significant attention as an efficient advanced oxidation activator,but its practical application is hindered by aggregation and oxidation.Coating nZVI with carbon can effectively addresses these issues.A simple and scalable production method for carbon-coated nZVI composite is highly desirable.The anti-oxidation and catalytic performance of carbon-coated nZVI composite merit in-depth research.In this study,a highly stable carbon-coated core-shell nZVI composite(Fe0@RF-C)was successfully prepared using a simple method combining phenolic resin embedding and carbothermal reduction.Fe0@RF-C was employed as a heterogeneous persulfate(PS)activator for degrading 2,4-dihydroxybenzophenone(BP-1),an emerging contaminant.Compared to commercial nZVI,Fe0@RF-C exhibited superior PS activation performance and oxidation resistance.Nearly 95%of BP-1 was removed within 10 min in the Fe0@RF-C/PS system.The carbon layer promotes the enrichment of BP-1 and accelerates its degradation through singlet oxygen oxidation and direct electron transfer processes.This study provides a straightforward approach for designing highly stable carbon-coated nZVI composite and elucidates the enhanced catalytic performance mechanism by carbon layers.
