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https://hdl.handle.net/2440/128295
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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 1879-1298 |
Statement of Responsibility: | 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. |
DOI: | 10.1016/j.chemosphere.2020.127160 |
Published version: | http://dx.doi.org/10.1016/j.chemosphere.2020.127160 |
Appears in Collections: | Aurora harvest 8 Chemical Engineering publications |
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