Issue 5, 2021, Issue in Progress
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RSC Advances

Enhanced anti-Escherichia coli properties of Fe-doping in MgO nanoparticles†

Xiaoyu Hong,a   Yan Yang, ORCID logo *a   Xiaoyi Li,a   Maurice Abitonze,a   Catherine Sekyerebea Diko,a   Jiao Zhao,*a   Qiao Ma,a   Weifeng Liua  and  Yimin Zhu*a  

* Corresponding authors

a Collaborative Innovation Center for Vessel Pollution Monitoring and Control, Dalian Maritime University, Dalian 116026, China
E-mail: [email protected], [email protected], [email protected]

Abstract

Hetero-elements doping is an effective way to modify the composition and nanostructure of metal oxides. These modifications could lead to changes in physical and chemical properties correspondingly. In this study, Fe-doped MgO nanoparticles (NPs) were synthesized by simple calcination method in air. The antibacterial activity of MgO NPs against Escherichia coli (E. coli, ATCC 25922) was significantly improved as shown by the bactericidal efficacy test results. According to X-ray diffraction (XRD) results, Fe was successfully doped into MgO lattice and mainly adopted interstitial doping. The Fe-doping led to increased oxygen vacancies and OA content (from 13.5% to 41.3%) on MgO surface, which may have facilitated the reactive oxygen species (ROS) generation and bacteria death. The wrinkled and sunken E. coli surface after contact with Fe-doped MgO NPs also confirmed the existence of adsorption damage mechanism. Thus, the antibacterial activity enhancement against E. coli was originated from the synergistic effect of increased ROS concentration and the interaction with Fe-doped MgO NPs.

Graphical abstract: Enhanced anti-Escherichia coli properties of Fe-doping in MgO nanoparticles

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Article information

DOI
https://doi.org/10.1039/D0RA09590G
Article type
Paper
Submitted
11 Nov 2020
Accepted
01 Jan 2021
First published
14 Jan 2021
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2021,11, 2892-2897

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Enhanced anti-Escherichia coli properties of Fe-doping in MgO nanoparticles

X. Hong, Y. Yang, X. Li, M. Abitonze, C. S. Diko, J. Zhao, Q. Ma, W. Liu and Y. Zhu, RSC Adv., 2021, 11, 2892 DOI: 10.1039/D0RA09590G

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