Flower-like SnO₂ Nanoparticle Biofabrication Using Pometia pinnata Leaf Extract and Study on Its Photocatalytic and...

The present study reported biofabrication of flower-like SnO₂ nanoparticles using Pometia pinnata leaf extract. The study focused on the physicochemical characteristics of the prepared SnO₂ nanoparticles and its activity as photocatalyst and antibacterial agent. The characterization was performed by XRD, SEM, TEM, UV-DRS and XPS analyses. Photocatalytic activity of the nanoparticles was examined on bromophenol blue photooxidation; meanwhile, the antibacterial activity was evaluated against Klebsiella pneumoniae, Escherichia coli Staphylococcus aureus and Streptococcus pyogenes. XRD and XPS analyses confirmed the single tetragonal SnO₂ phase. The result from SEM analysis indicates the flower like morphology of SnO₂ nanoparticles, and by TEM analysis, the nanoparticles were seen to be in uniform spherical shapes with a diameter ranging from 8 to 20 nm. SnO₂ nanoparticles showed significant photocatalytic activity in photooxidation of bromophenol blue as the degradation efficiency reached 99.93%, and the photocatalyst exhibited the reusability as the degradation efficiency values were insignificantly changed until the fifth cycle. Antibacterial assay indicated that the synthesized SnO₂ nanoparticles exhibit an inhibition of tested bacteria and showed a potential to be applied for further environmental and medical applications.