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The present study reports the biosynthesis of zinc oxide nanoparticles (ZnO NPs) using Clitoria ternatea flower extract and examination of their antibacterial activity. The change in color of the reaction mixture from violet to yellow colour indicated the formation of ZnO NPs. The formation of ZnO NPs was confirmed by the appearance of a maximum absorption peak at 381 nm in the UV-visible spectrum. The XRD pattern corresponding with the JCPDS card for ZnO showed the presence of purecrystalline ZnO NPs. FTIR spectra confirmed the stretching vibrations of C=O, C–O–H, and O–H groups involved in the reduction of ZnO NPs. The size and morphology of the ZnO NPs were confirmed by Transmission Electron Microscopy (TEM). Further particle size was determined by using Dynamic Light Scattering (DLS). Furthermore, the antibacterial activity of ZnO NPs showed significant inhibitory activity against Escherichia coli and Staphylococcus aureus bacteria.


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Green-based Biosynthesis of Zinc Oxide Nanoparticles Using Clitoria Ternatea Flower Extract and Its Antibacterial Activity

Show Author's information Selvaraj Prabhu1,2( )Daniel Thangadurai Thangaian3Palaniswamy Vijai Bharathy4
Department of Research and Development, Bharathiar University, Tamil Nadu, India
Department of Physics, Hindusthan College of Engineering and Technology, Coimbatore, Tamil Nadu, India
Department of Nanoscience and Technology, Sri Ramakrishna Engineering College, Coimbatore, Tamil Nadu, India
Department of Physics, C.B.M College, Coimbatore, Tamil Nadu, India

Abstract

The present study reports the biosynthesis of zinc oxide nanoparticles (ZnO NPs) using Clitoria ternatea flower extract and examination of their antibacterial activity. The change in color of the reaction mixture from violet to yellow colour indicated the formation of ZnO NPs. The formation of ZnO NPs was confirmed by the appearance of a maximum absorption peak at 381 nm in the UV-visible spectrum. The XRD pattern corresponding with the JCPDS card for ZnO showed the presence of purecrystalline ZnO NPs. FTIR spectra confirmed the stretching vibrations of C=O, C–O–H, and O–H groups involved in the reduction of ZnO NPs. The size and morphology of the ZnO NPs were confirmed by Transmission Electron Microscopy (TEM). Further particle size was determined by using Dynamic Light Scattering (DLS). Furthermore, the antibacterial activity of ZnO NPs showed significant inhibitory activity against Escherichia coli and Staphylococcus aureus bacteria.

Keywords: Characterization, XRD, Antibacterial activity, Biosynthesis, Zinc oxide nanoparticles

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Publication history
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Publication history

Received: 07 July 2021
Accepted: 04 November 2021
Published: 10 December 2021
Issue date: December 2021

Copyright

© Selvaraj Prabhu, Daniel Thangadurai Thangaian, and Palaniswamy Vijai Bharathy.

Acknowledgements

Acknowledgements

Author SP sincerely acknowledges the Department of Nanoscience and Technology, Sri Ramakrishna Engineering College-Coimbatore, for providing UV, FTIR, XRD analysis and DST-FIST lab facilities, and Hindusthan College of Engineering and Technology, Coimbatore, for providing technical support.

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This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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