The recovery and subsequent reuse of heavy metal ions from industrial wastewater are crucial for promoting sustainable development,but they also presen significant challenges.In this article,ethylenediaminetetraacetic...The recovery and subsequent reuse of heavy metal ions from industrial wastewater are crucial for promoting sustainable development,but they also presen significant challenges.In this article,ethylenediaminetetraacetic dianhydride(EDTAD),which possesses strong metal chelating ability,is covalently attached to MIL-101-NH_(2)(Fe),resulting in a significant improvement in the removal rate of heavy metal ions in wastewater.Furthermore,the recovered waste metal ions are transformed into high-performance FeNi_(3)/NiFe_(2)O_(4)@NC dual-functional oxygen evolution reaction(OER)and oxygen reduction reaction(ORR)catalysts.Specifically,FeNi_(3)/NiFe_(2)O_(4)@NC exhibits outstanding OER performance,with only a264 mV overpotential at 10 mA·cm^(-2).Density functiona theory(DFT)calculations reveal that the synergistic effect of the FeNi_(3)/NiFe_(2)O_(4)@NC heterostructure can enhance conductivity,optimize the free energy of*to OH*during OER reaction,and promote catalytic reactivity.This work not only improves the removal rate of heavy metal ions but also obtains high-performance catalysts,while providing a new approach for the treatment and secondary utilization of heavy metal ion wastewater as well as the preparation of low-cost catalysts.展开更多
基金financially supported by the National Natural Science Foundation of China for Youths(Nos.21701059,21804059 and 51902140)the Natural Science Foundation of Jiangsu Province for Youths(No.BK20170571)。
文摘The recovery and subsequent reuse of heavy metal ions from industrial wastewater are crucial for promoting sustainable development,but they also presen significant challenges.In this article,ethylenediaminetetraacetic dianhydride(EDTAD),which possesses strong metal chelating ability,is covalently attached to MIL-101-NH_(2)(Fe),resulting in a significant improvement in the removal rate of heavy metal ions in wastewater.Furthermore,the recovered waste metal ions are transformed into high-performance FeNi_(3)/NiFe_(2)O_(4)@NC dual-functional oxygen evolution reaction(OER)and oxygen reduction reaction(ORR)catalysts.Specifically,FeNi_(3)/NiFe_(2)O_(4)@NC exhibits outstanding OER performance,with only a264 mV overpotential at 10 mA·cm^(-2).Density functiona theory(DFT)calculations reveal that the synergistic effect of the FeNi_(3)/NiFe_(2)O_(4)@NC heterostructure can enhance conductivity,optimize the free energy of*to OH*during OER reaction,and promote catalytic reactivity.This work not only improves the removal rate of heavy metal ions but also obtains high-performance catalysts,while providing a new approach for the treatment and secondary utilization of heavy metal ion wastewater as well as the preparation of low-cost catalysts.
