Synthesis of ZnO Nanoparticles with Antibacterial Properties Using Terminalia catappa Leaf Extract. Issue 4 (11th February 2022)

• Record Type: Journal Article
• Authors: Azimpanah, Razieh; Solati, Zahra; Hashemi, Majid
• Is Part Of: Chemical engineering & technology. Volume 45:Issue 4(2022)
• Page Start: 658
• Page End: 666
• Publication Date: 2022-02-11
• Subjects: Antibacterial activity -- Bacteriocide agents -- ZnO nanoparticles; Chemical engineering -- Periodicals; Chemical processes -- Periodicals; 660.05
• DOI: 10.1002/ceat.202100430
• Languages: English
• ISSNs: 0930-7516

Abstract

Abstract: In order to develop alternative drugs against resistant pathogens, capped ZnO nanoparticles (NPs) were prepared using Terminalia catappa leaf extract. By changes in pH and aging time, cauliflower‐like, sheet‐like, and hierarchical morphologies for ZnO NPs were obtained. Their antibacterial activities against Staphylococcus aureus and Escherichia coli were investigated. The results demonstrated that the green synthesized ZnO NPs exhibit higher antibacterial activity than chemically prepared ZnO NPs. The antibacterial activity of hierarchical ZnO NPs was greater than that of the other morphologies, which was attributed to the higher oxygen vacancy in ZnO NPs leading to enhanced reactive oxygen species (ROS) generation. The mechanism of the formation of ZnO nanocrystals was also discussed. Abstract : A simple, green, cost‐effective, and large‐scale synthetic method is reported for preparing capped ZnO nanoparticles in the presence of Terminalia catappa leaf extract via a precipitation method under mild conditions. Differences in pH and aging time lead to dissimilar morphologies. The obtained hierarchical flower‐like ZnO nanoparticles exhibit the highest antibacterial activity.