Chemical bath synthesis of CuO-GO-Ag nanocomposites with enhanced antibacterial properties

• Published in: Journal of alloys and compounds 2020-04, Vol.821, p.153456, Article 153456
• Main Authors: Hajipour, Pejman, Bahrami, Abbas, Eslami, Abdoulmajid, Hosseini-Abari, Afrouzossadat, Hagh Ranjbar, Hamid reza
• Format: Article
• Language: English
• Subjects: Antibacterial activity; Bacteria; Chemical synthesis; Copper oxide; Copper oxides; Crystal structure; Crystallites; Crystallography; Deposition; E coli; Fourier transforms; Graphene oxide; Mapping; Nanocomposite; Nanocomposites; Nanoparticles; Particle size distribution; Precursors; Properties (attributes); Silver; Spectrum analysis
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2019.153456

Copper oxide particles have found applications as strong photocatalytic antibacterial agents in recent years. This paper investigates the facile chemical bath deposition synthesis and antibacterial properties of nanocrystalline CuO, CuO-GO, and CuO-GO-Ag nanocomposites. CuO samples were synthesized through a chemical bath deposition method and the introduction of GO nanosheets and silver nanoparticles into the precursor solutions was used to obtain CuO-GO and CuO-GO-Ag nanocomposites. Scanning electron microscope, energy dispersive spectroscopy, elemental mapping, and Fourier-transform infrared spectroscopy were used to characterize synthesized specimens. Antibacterial properties of the nanocomposites were examined against Gram-positive Staphylococcus aureus ATCC 25923 and Gram-negative Escherichia coli ATCC 25922 by the disc diffusion method and minimum inhibitory concentration (MIC) measurements. CuO particles with monoclinic crystallographic structure and crystallite size of 10 nm were synthesized. Synthesized particles were spherical with a narrow size distribution, between 5 and 10 μm. Minor addition of GO to the precursor solution resulted in less agglomeration of nanocomposite powders. CuO-GO-Ag nanocomposite showed noticeable enhanced antibacterial activities against the tested bacteria under visible light, resulting in MIC of 2.6 ± 0.5 mg/ml against Gram-positive and Gram-negative bacteria and also higher inhabitation zone compared to CuO and CuO-GO nanocomposites. •Structure and antibacterial properties of CuO-GO-Ag nanocomposites are investigated.•Chemical bath deposition was used to synthesize nanocomposite samples.•Ag/GO-containing nanocomposite had the best antibacterial activity.•Correlations between structure and antibacterial activity are discussed.