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Type: Journal article
Title: Heterogeneous activation of peroxymonosulfate by hierarchically porous cobalt/iron bimetallic oxide nanosheets for degradation of phenol solutions
Author: Li, L.
Wu, H.
Chen, H.
Zhang, J.
Xu, X.
Wang, S.
Wang, S.
Sun, H.
Citation: Chemosphere, 2020; 256:127160-1-127160-11
Publisher: Elsevier
Issue Date: 2020
ISSN: 0045-6535
Statement of
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.
RMID: 1000021352
DOI: 10.1016/j.chemosphere.2020.127160
Appears in Collections:Chemical Engineering publications

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