Abstract
In this work, a novel nanocomposite (NC) based on the decoration of Ag nanoparticles (NPs) and W[Formula: see text]O[Formula: see text] nanorods (NRs) on the GO surfaces was prepared using combined techniques of solvothermal method and photochemical process. Compared with the Ag-GO NC, the Ag-W[Formula: see text]O[Formula: see text]-GO NC exhibited enhanced long-term antibacterial activity against the bacterium of Bacillus sp.1NLA3E (Bacillus sp.). The antibacterial mechanisms of both the Ag-GO and Ag-W[Formula: see text]O[Formula: see text]-GO NCs were distinctly revealed by observation of the direct interaction between the Ag NPs, W[Formula: see text]O[Formula: see text] NRs, or GO sheets and the bacterial cells. Results showed that the GO sheets in the NCs mainly acted as supports for trapping or wrapping the bacterial cells, and it was the Ag NPs or W[Formula: see text]O[Formula: see text] NRs grown on the GO surfaces that caused direct damage to the cells. The synergistic effects between the Ag NPs or W[Formula: see text]O[Formula: see text] NRs and the GO sheets resulted in the prominent long-term antibacterial effect of the Ag-W[Formula: see text]O[Formula: see text]-GO NC. This work provides in-depth understanding of the mechanism regarding the antibacterial activity of the GO-based NCs.
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