Fabrication and Excellent Antibacterial Activity of Well-defined CuO/Graphdiyne Nanostructure

Abstract

Copper oxide(CuO), due to its low cost, good chemical and physical stability, has recently been given special attention as a potential candidate for antibacterial agents. However, developing novel CuO nanocomposites with improved antibacterial property and unraveling the interface promotion mechanism has been a fundamental challenge for decades. Herein, well-defined CuO/graphdiyne(CuO/GDY) nanostructures with uniformly anchored CuO nanoparticles(ca. 4.5 nm) have been fabricated. The CuO/GDY nanostructure exhibited superior E. coli inactivation efficiency, which is nearly 19 times and 7.9 times higher than the bare GDY and commercial CuO, respectively. The improved E. coli inactivation performance was mainly due to the increased reactive ^·O₂ ⁻ species generated by the activation of molecular O₂ over CuO/GDY surface. These findings demonstrate the efficient antibacterial activity of well-defined CuO/GDY nanostructures and provide insights on the development of efficient GDY-based antibacterial materials.

Keywords

Graphdiyne / CuO/GDY nanocomposite / Escherichia coli / Antibacterial / Superoxide radical

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