Green chemistry synthesis and Escherichia coli antibacterial activity of silver and zinc oxide nanoparticles

Ag and ZnO nanoparticles (NPs) were synthesized by a green synthesis from a Pinus latteri tree extraction. Characterizations of the as-prepared Ag and ZnO NPs were determined by DSC/TGA analyses, XRD patterns, and FE-SEM images. The average particles of the as-prepared materials, including Ag NPs and ZnO NPs, are approximately 25 nm and 45 nm, respectively. The XRD patterns confirmed the presence of the Ag metal and ZnO wurtzite crystalline phases. In addition, an agar-well diffusion method was used to evaluate the Escherichia coli (E. coli) antibacterial activity of as-prepared materials. Results show that Ag NPs and ZnO NPs have a high inhibitory ability against E. coli bacteria. Specially, E. coli antibacterial activity of Ag NPs is higher than ZnO NPs under the same conditions.

Automated summary

Ag and ZnO nanoparticles were synthesized using a green synthesis method from a Pinus latteri tree extraction. The synthesized nanoparticles were characterized using DSC/TGA analyses, XRD patterns, and FE-SEM images. The average particle sizes of the synthesized Ag and ZnO nanoparticles were approximately 25 nm and 45 nm, respectively. XRD patterns confirmed the presence of Ag metal and ZnO wurtzite crystalline phases. Additionally, the agar-well diffusion method showed that both Ag and ZnO nanoparticles exhibited strong inhibitory activity against E. coli bacteria. Specifically, the antibacterial activity of Ag nanoparticles was higher than that of ZnO nanoparticles under the same conditions.