Title of article :
Biosynthesis, characterization, and antibacterial activity of zinc oxide nanoparticles derived from Bauhinia tomentosa leaf extract
Author/Authors :
Sharmila, G Department of Industrial Biotechnology - Government College of Technology - Coimbatore, India , Muthukumaran, C Department of Industrial Biotechnology - Government College of Technology - Coimbatore, India , Sandiya, K Department of Industrial Biotechnology - Government College of Technology - Coimbatore, India , Santhiya, S Department of Industrial Biotechnology - Government College of Technology - Coimbatore, India , Sakthi Pradeep, R Department of Industrial Biotechnology - Government College of Technology - Coimbatore, India , Manoj Kumar, N Department of Genetic Engineering - SRM Institute of Science and Technology - Kattankulathur - Chennai, India , Suriyanarayanan, N Department of Physics - Government College of Technology - Coimbatore, India , Thirumarimurugan, M Department of Chemical Engineering - Coimbatore Institute of Technology - Coimbatore, India
Abstract :
A facile, eco-friendly synthesis of zinc oxide nanoparticles (ZnO NPs) employing Bauhinia tomentosa leaf extract as bioreducing
agent was reported. The green-synthesized ZnO NPs were characterized by UV–Vis, TEM, EDX, XRD, and FTIR
analyses. The formation of ZnO NPs was confirmed by the appearance of characteristic SPR peak at 370 nm due to the collective
oscillation of electrons in the conduction band in UV–Vis spectra. The hexagonal morphology exhibiting nanosized ZnO
was observed from the TEM and XRD analyses. The chemical bonds present in the as-synthesized ZnO NPs were identified
by FTIR analysis. ZnO NPs showed a significant antibacterial activity against Gram-negative bacteria P. aeruginosa and E.
coli than Gram-positive bacteria. Results of this study demonstrated that B. tomentosa leaf extract containing phytochemicals
such as alkaloids, terpenoids, flavonoids, tannins, carbohydrates, and sterols possess bioreducing property for ZnO synthesis
and the obtained ZnO NPs could be employed effectively as a better bactericidal agent for biological applications.
Keywords :
Green synthesis , ZnO , Nanoparticles , Antibacterial activity , Bauhinia tomentosa
