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Synthesis of Ag/rGO composite materials with antibacterial activities using facile and rapid microwave-assisted green route

Journal of Materials Science: Materials in Medicine volume 29, Article number: 69 (2018) Cite this article

Abstract

The present paper represents a facile and rapid synthesis of silver-reduced graphene oxide Ag/rGO (Ag/reduced graphite oxides) composites with the help of microwave irradiation. This is a rapid green route requiring power microwave irradiation only 400 W(30 s) and 200 W (60 s) for the uniform Ag nanoparticles with average diameter of ~10 nm embedded on rGO sheets. In the microwave irradiation process, rGO samples absorb electromagnetic energy to be heated rapidly due to their intrinsic dielectric and conductive losses. Local hot sheets appear in aqueous solution, facilitating homogeneous nucleation, as well as the grain growth of Ag crystallites throughout the rGO sheets. The obtained Ag/rGO composites exhibited significant antibacterial property towards Gram-negative bacteria (E. coli and P. aeruginosa), Gram-positive bacteria (S. aureus and Enterococcus), and white rot fungus. The minimum bactericidal concentration of the Ag /rGO nanocomposite against E. coli was about 1 μg/mL. Strong interaction between Ag/rGO composites and bacteria contributed to the totally non-activity of bacteria.

We designed Ag/rGO nanocomposite with excellent antibacterial activities by facile andrapid microwave-assisted green route. In Ag/rGO nanocomposite, the morphology and size distributions of Ag particles anchored on the rGO sheets can controlled via the microwave irradiation power and time. The results suggested that in the microwave field, GO reduced into unique rGO sheets and uniform AgNPs with average size of 12 nm can be decorated on rGO sheets at 30 s and at 200 W, respectively. we successfully demonstrated small silver particles anchored on graphene displayed great antibacterial activities against Gram-negative bacteria (E. coli and P. aeruginosa), Gram-positive bacteria (S. aureus and Enterococcus) and white rot fungus. Ag/rGO nanocomposites may have potential applications as antibacterial agent for daily life.

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Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (Grants 51602287, 21504082 and 51172113), the Henan Provincial Department of Science and Technology Research Project (17A430006).

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Affiliations

  1. School of Material Science and Engineering, Zhengzhou University, Zhengzhou, Henan, 450001, China

    Bingbing Fan, Yaya Li, Fengqi Han, Tingting Su & Rui Zhang

  2. Zhengzhou University People’s hospital, Zhengzhou University, Zhengzhou, Henan, 450003, China

    Jingguo Li

  3. Henan Key Laboratory of Aeronautical Material and Application Technology, Zhengzhou University of Aeronautics, Zhengzhou, Henan, 450015, China

    Rui Zhang

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  1. Bingbing Fan
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Correspondence to Jingguo Li or Rui Zhang.

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Fan, B., Li, Y., Han, F. et al. Synthesis of Ag/rGO composite materials with antibacterial activities using facile and rapid microwave-assisted green route. J Mater Sci: Mater Med 29, 69 (2018). https://doi.org/10.1007/s10856-018-6081-1

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  • DOI: https://doi.org/10.1007/s10856-018-6081-1