Synthesis, characterization, and antibacterial activities of Cu-Ag bimetallic oxide nanocomposites using Eichhornia crassipes aqueous leaf extract

Abstract

Green synthesis of bimetallic oxide nanocomposite with leaf extract of Eichhornia crassipes (1) is attracted much in recent researchers. The as-synthesized CuO/Ag2O/Ext (2) and CuO/Ag2O NCPs (3) were characterized by UV-Vis, FT-IR, SEM, XRD, and TGA. The disc diffusion method was used to assess the antibacterial potential of (1), (2), and (3) against a total of four human pathogens bacteria. S. aureus and S. epidermides were the growth inhibitory effect in the range of 6.3 ± 0.33 mm, 26 ± 0.58 to 30 ± 0.58 mm, and 23 ± 0.15 to 30 ± 0.58 mm and 6.7 ± 0.33 mm, 22.3 ± 0.88 to 26.3 ± 0.88 mm, and 26 ± 0.58 to 28 ± 0.58 mm for (1), (2), and (3), respectively. Whereas, E. coli and K. pneumonia showed in the range of 7.00 mm, 26.7 ± 0.88 to 29.3 ± 0.33 mm, and 22.7 ± 0.88 to 27.3 ± 0.88 mm and 6.3 ± 0.33 mm, 25 ± 0.88 to 27.3 ± 0.33 mm, and 25.7 ± 0.33 to 27 ± 0.58 mm for (1), (2), and (3), respectively. The XRD technique confirmed the nano-size structure of (2) and (3) (D = 33.41 nm and 28.22 nm, respectively).