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|Title:||Heterogeneous activation of peroxymonosulfate by hierarchically porous cobalt/iron bimetallic oxide nanosheets for degradation of phenol solutions|
|Citation:||Chemosphere, 2020; 256:127160-1-127160-11|
|Lei Li, Hong Wu, Haijun Chen, Jinqiang Zhang, Xinyuan Xu, Shuaijun Wang, Shaobin Wang, Hongqi Sun|
|Abstract:||Bimetallic oxide nanomaterials have received much attention owing to their competing performances in heterogeneous catalysis. Herein, hierarchically porous cobalt-iron oxide nanosheets were successfully prepared using NaBH₄ as a reductant and high concentration cetyl trimethylammonium bromide (CTAB) as a surfactant. Characterization results showed that the CTAB would induce the form of a bilayer structure while NaBH₄ would promote the generation of enriched oxygen vacancies. As a result, the as-prepared Co₁Fe₁-300 exhibited high activity for activating peroxymonosulfate and achieved 100% phenol degradation within 30 min. This excellent catalytic activity can be attributed to its hierarchically porous structure, more active sites and oxygen vacancies. Co leaching test indicated that the Co₁Fe₁-300 exhibited excellent catalytic stability. Mechanistic studies suggested that two main degradation pathways were involved during phenol oxidation process, in which SO₄•– played a significant role. This work may offer a novel strategy for the synthesis of high activity catalysts and a promising system for the remediation of environmental pollutant.|
|Keywords:||Peroxymonosulfate; cobalt iron oxides; hierarchically porous structure; oxygen vacancies; sulfate radicals|
|Rights:||© 2020 Elsevier Ltd. All rights reserved.|
|Appears in Collections:||Chemical Engineering publications|
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