Facile synthesis of rGO-MoS2-Ag nanocomposites with long-term antimicrobial activities.

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ID: 67649
2019
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Abstract
The abuse of antibiotics has led to the emergence of numerous super resistant bacteria, which pose a serious threat to the public health. Developing nanomaterials with novel modes of bactericidal activity offers the promise to fight pathogens without the risk of causing drug resistances. Here, we used reduced graphene oxide (rGO), bulk molybdenum disulfide (MoS2) and silver nitrate (AgNO3) to synthesize a ternary nanocomposites, rGO-MoS2-Ag, via a simple one-pot method. The resulting rGO-MoS2-Ag presented as crumpled and sheet-like structures decorated with Ag nanoparticles. The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of rGO-MoS2-Ag against Escherichia coli were 50 and 100 μg/mL, while Staphylococcus aureus reacted only to twice higher concentrations of 100 and 200 μg/mL, respectively. Notably, rGO-MoS2-Ag exhibited better antibacterial activity towards E. coli and S. aureus than rGO, MoS2, or rGO-MoS2. This result can be attributed to the excellent performance of rGO-MoS2-Ag in destroying the bacterial cell membrane and inducing the generation of reactive oxygen species (ROS). The Ag+ ion release of rGO-MoS2-Ag was delayed, endowing the nanocomposite with long-term antibacterial capabilities and better biosafety. Our results indicate that the as-prepared rGO-MoS2-Ag has promising potential for application in biomedicine and public health.
Reference Key
li2019facilenanotechnology Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Li, Jingchen;Zheng, Jie;Yu, Yadong;Su, Zhen;Zhang, Lihui;Chen, Xiaojun;
Journal Nanotechnology
Year 2019
DOI
10.1088/1361-6528/ab5ba7
URL
Keywords
antibacterial activity molybdenum disulfide 2d material silver, long-term

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