Biogenic copper oxide nanoparticles synthesis using Tabernaemontana divaricate leaf extract and its antibacterial activity against urinary tract pathogen

Rajeshwari Sivaraj*, Pattanathu K.S.M. Rahman, P. Rajiv, Hasna Abdul Salam, R. Venckatesh

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


This investigation explains the biosynthesis and characterization of copper oxide nanoparticles from an Indian medicinal plant by an eco-friendly method. The main objective of this study is to synthesize copper oxide nanoparticles from Tabernaemontana divaricate leaves through a green chemistry approach. Highly stable, spherical copper oxide nanoparticles were synthesized by using 50% concentration of Tabernaemontana leaf extract. Formation of copper oxide nanoparticles have been characterized by UV-Vis absorption spectroscopy, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) with energy dispersive X-ray analysis (EDX) and transmission electron microscopy (TEM) analysis. All the analyses revealed that copper oxide nanoparticles were 48 ± 4 nm in size. Functional groups and chemical composition of copper oxide were also confirmed. Antimicrobial activity of biogenic copper oxide nanoparticles were investigated and maximum zone of inhibition was found in 50 μg/ml copper oxide nanoparticles against urinary tract pathogen (Escherichia coli).

Original languageEnglish
Pages (from-to)178-181
Number of pages4
JournalSpectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
Early online date29 May 2014
Publication statusPublished - 10 Dec 2014


  • Antibacterial activity
  • Copper oxide nanoparticles
  • FT-IR
  • SEM
  • TEM


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