Magnetically steerable iron oxides-manganese dioxide core–shell micromotors for organic and microplastic removals

Document Type

Journal Article

Publication Title

Journal of Colloid and Interface Science

Volume

588

First Page

510

Last Page

521

PubMed ID

33429347

Publisher

Elsevier

School

School of Engineering

RAS ID

39582

Funders

National Natural Science Foundation of China Shenzhen Science and Technology Program Shenzhen Bay Laboratory Natural Science Foundation of Guangdong Province Australian Research Council

Grant Number

ARC Number : DP190103548

Grant Link

http://purl.org/au-research/grants/arc/DP190103548

Comments

Ye, H., Wang, Y., Liu, X., Xu, D., Yuan, H., Sun, H., ... Ma, X. (2021). Magnetically steerable iron oxides-manganese dioxide core–shell micromotors for organic and microplastic removals. Journal of Colloid and Interface Science, 588, 510-521. https://doi.org/10.1016/j.jcis.2020.12.097

Abstract

© 2020 Elsevier Inc. 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.

DOI

10.1016/j.jcis.2020.12.097

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