Antibacterial Activity and Mechanism of GO/Cu2O/ZnO Coating on Ultrafine Glass Fiber

Manna Li; Zhaofeng Chen; Lixia Yang; Jiayu Li; Jiang Xu; Chao Chen; Qiong Wu; Mengmeng Yang; Tianlong Liu

doi:10.3390/nano12111857

Antibacterial Activity and Mechanism of GO/Cu₂O/ZnO Coating on Ultrafine Glass Fiber

Nanomaterials (Basel). 2022 May 29;12(11):1857. doi: 10.3390/nano12111857.

Authors

Manna Li^{1

2

3}, Zhaofeng Chen¹, Lixia Yang¹, Jiayu Li¹, Jiang Xu¹, Chao Chen^{1

2

3}, Qiong Wu^{1

2}, Mengmeng Yang^{1

2}, Tianlong Liu^{1

2}

Affiliations

¹ International Laboratory for Insulation and Energy Efficiency Materials, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China.
² Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China.
³ Suqian Kongtian New Materials Co., Ltd., Suqian 223800, China.

Abstract

A GO (graphene oxide)/ZnO/Cu₂O antibacterial coating was successfully sprayed on the ultrafine glass fibers using room temperature hydrothermal synthesis and air spraying techniques. The microstructures of the antibacterial coating were characterized, and the results showed that the Cu₂ONPs (nano particles)/ZnONPs were uniformly dispersed on the surface of GO. Then, the antibacterial properties of the GO/ZnO/Cu₂O (GZC) antibacterial coating were evaluated using the disc diffusion test. It was found that the coating exhibits excellent antibacterial properties and stability against E. coli and S. aureus, and the antibacterial rate of each group of antibacterial powder against Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli) was 100%. To explore the antibacterial mechanism of the GZC antibacterial powder on the ultrafine glass fibers based on the photocatalysis/oxidative stress method, the photoelectric coupling synergistic effect between GZC antibacterial coating was analyzed deeply. The results all showed that the photochemical activity of GZC antibacterial powder was significantly improved compared with pure component materials. The enhancement of its photochemical activity is beneficial to the generation of ROS (including hydroxyl radicals, superoxide anion radicals, etc.), which further confirms the speculation of the photocatalytic/oxidative stress mechanism.

Keywords: E. coli and S. aureus; GO/ZnO/Cu2O antibacterial powder; antibacterial coating; antibacterial mechanism; antibacterial properties; ultrafine glass fibers.

Abstract

Grants and funding