双金属
双金属片
催化作用
化学
降级(电信)
反应性(心理学)
碳纤维
钴
核化学
无机化学
化学工程
材料科学
复合数
有机化学
医学
电信
替代医学
物理化学
病理
计算机科学
复合材料
工程类
作者
Yaoyu Zhou,Jianlong Wang
标识
DOI:10.1016/j.seppur.2023.124388
摘要
Developing high performance electrocatalysts for effective antibiotics elimination for heterogeneous electro-Fenton (Hetero-EF) process is still a challenge. This work synthesized iron/cobalt bimetallic N doped graphitic carbon cages (FexCo@NC) from ZIF-8@ZIF-67-Fe dual MOF composite for Cephalosporin C (CEP-C) degradation in the Hetero-EF system at a wide pH range. Results indicated that CEP-C degradation rate and total organic carbon (TOC) removal efficiency by Fe40Co@NC catalyst were as high as 82.45% (60 min) and 61.35% (240 min) at natural pH, respectively. The unique structure with FeCo bimetal encapsulated inside the N doped graphitic carbon cages enabled Fe40Co@NC to show excellent catalytic reactivity for H2O2 activation. The generated M (•OH) and •OH all contributed to CEP-C degradation. The synergistic effects of Co0/Co2+/Co3+ and Fe0/Fe2+/Fe3+ cycles made Fe40Co@NC catalyst to continuously activate H2O2. Moreover, Fe40Co@NC catalyst showed good stability in consecutive cycles, and could still remain excellent reactivity when applied for CEP-C degradation from the real CEP-C fermentation residue supernatant. Furthermore, a possible CEP-C degradation pathway was proposed based on the identified intermediates.
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