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Substrate-free Graphene Oxide-based Micromotor for Rapid Adsorption of Antibiotic

Abstract

Self-propelled micro/nanomotors play a crucial role in biomedicine, energy and environment fields, but limited by low throughput and tedious fabrication approach. Here, we proposed a simple microfluidic-based scheme for fabricating substrate-free graphene oxide (GO)-based micromotor of different shapes and sizes with high throughput. The micromotor is designed to own ‘Janus’ and porous structure and the half of each micromotor is modified by hierarchical Pt nanoflowers, which can promote Pt wetting with H2O2 solution and result in high movement speed. For exploring the applicability of the micromotor, it is employed to rapidly remove antibiotic in solutions, for example, the tetracycline. It is found that the rapid movement of micromotor can enhance mass transfer of tetracycline and collision frequency between tetracycline and micromotors, leading to a high removal efficiency. The movement direction of micromotor can be conveniently controlled by external magnetic field. Furthermore, the removal efficiency and removal time over the number of micromotors, the adsorption kinetic and adsorption isotherm, and the removal amount over the pH have been investigated. It proves that the constructed micromotor exhibits high adsorption capabilities for the tetracycline, and implies that it holds a great promise for the removal of the antibiotics with similar structure or other pollutants including organic compound, heavy metal and oil droplet.

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Publication details

The article was received on 15 Nov 2018, accepted on 11 Feb 2019 and first published on 11 Feb 2019


Article type: Paper
DOI: 10.1039/C8NR09229J
Citation: Nanoscale, 2019, Accepted Manuscript

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    Substrate-free Graphene Oxide-based Micromotor for Rapid Adsorption of Antibiotic

    Y. Dong, Y. Chen, S. Yang, J. Wang, P. Chen, X. Liu, W. Du, S. Wang and B. Liu, Nanoscale, 2019, Accepted Manuscript , DOI: 10.1039/C8NR09229J

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