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Research Article | Open Access

Highly antibacterial rGO/Cu2O nanocomposite from a biomass precursor: Synthesis, performance, and mechanism

Mingguang Chena,b, Zhi Lic, Long Chenb,d( )
Department of Materials Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
Department of Chemical and Environmental Engineering, University of California, Riverside, CA, 92521, United States
California State University, San Bernardino, CA, 92407, United States
Department of Civil and Environmental Engineering, Northeastern University, Boston, MA, 02115, United States
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Abstract

Reduced graphene oxide (rGO) has been widely used to fabricate electronics, sensors, photodetectors, and in other applications. However, the antibacterial performance of pristine rGO is relatively weak. The application of rGO in biomedical devices, smart food packaging, and water desalination membranes requires further improvement of rGO's antibacterial abilities. Copper(Ⅰ) oxide (Cu2O) is an effective antibacterial agent, which denatures protein and enhances the permeability of cell membranes. In this work, we report a simple method of synthesizing a highly antibacterial rGO/Cu2O nanocomposite from cellulose acetate, a derivative of abundant natural cellulose. The synthesized rGO/Cu2O nanocomposite was thoroughly characterized by Raman spectroscopy, X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), and scanning transmission electron microscopy (STEM). Then, the antibacterial abilities of rGO/Cu2O nanocomposite were evaluated and a bactericidal mechanism was revealed from the molecular biology perspective. Results indicate that our synthesized rGO/Cu2O nanocomposite owns strong antibacterial activity, mainly stemming from the uniformly incorporated Cu2O nanocrystals with a lateral size of 5–40 nm.

Keywords

AntibacterialCellulose acetaterGO/Cu2O nanocomposite

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Nano Materials Science
Volume 2 Issue 2,
June 2020
Pages 172-179
DOI: 10.1016/j.nanoms.2019.09.005
Cite this article:
Chen M, Li Z, Chen L. Highly antibacterial rGO/Cu2O nanocomposite from a biomass precursor: Synthesis, performance, and mechanism. Nano Materials Science, 2020, 2(2): 172-179. https://doi.org/10.1016/j.nanoms.2019.09.005

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Received: 15 May 2019
Accepted: 19 August 2019
Published: 11 September 2019
© 2019 Chongqing University.

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
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