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Type: Journal article
Title: Magnetically steerable iron oxides-manganese dioxide core-shell micromotors for organic and microplastic removals
Author: Ye, H.
Wang, Y.
Liu, X.
Xu, D.
Yuan, H.
Sun, H.
wang, S.
Ma, X.
Citation: Journal of Colloid and Interface Science, 2021; 588:510-521
Publisher: Elsevier
Issue Date: 2021
ISSN: 0021-9797
Statement of
Heng Ye, Yong Wang, Xiaojia Liu, Dandan Xu, Hao Yuan, Hongqi Sun, Shaobin Wang, Xing Ma
Abstract: Because of micro/nanoscale manipulation and task-performing capability, micro/nanomotors (MNMs) have attracted lots of research interests for potential applications in biomedical and environmental applications. Owing to the low-cost, good motion behavior, and environmental friendliness, various low-cost metal oxides based MNMs become promising alternatives to the precious metal based MNMs, in particular for environmental remediation applications. Hereby, we demonstrate the facile and scalable fabrication of two types of bubble-propelled iron oxides-MnO₂ core-shell micromotors (Fe₃O₄-MnO₂ and Fe₂O₃-MnO₂) for pollutant removal. The Fe₂O₃-MnO₂ micromotor exhibits efficient removals of both aqueous organics and suspended microplastics via the synergy of catalytic degradation, surface adsorption, and adsorptive bubbles separations mechanisms. The adsorptive bubbles separation achieved more than 10% removal of the suspended microplastics from the polluted water in 2 h. We clarified the major contributions of different remediation mechanisms in pollutants removals, and the findings may be beneficial to a wide range of environmental applications of MNMs.
Keywords: MnO₂ micromotors; magnetic core–shell structure; catalytic degradation; adsorptive bubbles separation; microplastics separation
Rights: © 2020 Elsevier Inc. All rights reserved.
DOI: 10.1016/j.jcis.2020.12.097
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Chemical Engineering publications

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