Abstract
Synthesis of metal nanoparticles using biological systems is an expanding research area in nanotechnology. Moreover, search for new nanoscale antimicrobials is been always attractive as they find numerous avenues for application in medicine. Biosynthesis of metallic nanoparticles is cost effective and eco-friendly compared to those of conventional methods of nanoparticles synthesis. Herein, we present the synthesis of zinc oxide nanoparticles using the stem bark extract of Boswellia ovalifoliolata, and evaluation of their antimicrobial efficacy. Stable ZnO nanoparticles were formed by treating 90 ml of 1 mM zinc nitrate aqueous solution with 10 ml of 10 % bark extract. The formation of B. ovalifoliolata bark-extract-mediated zinc oxide nanoparticles (BZnNPs) was confirmed by UV–visible spectroscopic analysis and recorded the localized surface plasmon resonance (LSPR) at 230 nm. Fourier transform infrared spectroscopic (FT-IR) analysis revealed that primary and secondary amine groups in combination with the proteins present in the bark extract are responsible for the reduction and stabilization of the BZnNPs. The morphology and crystalline phase of the nanocrystals were determined by Transmission electron microscopy (TEM). The hydrodynamic diameter (20.3 nm) and a positive zeta potential (4.8 mV) were measured using the dynamic light scattering technique. The antimicrobial activity of BZnNPs was evaluated (in vitro) against fungi, Gram-negative, and Gram-positive bacteria using disk diffusion method which were isolated from the scales formed in drinking water PVC pipelines.
Highlights
The development of green processes for the synthesis of nanoparticles has been evolving into an important branch of nanotechnology as green nanotechnology deals with the safe and eco-friendly methods for nanomaterials fabrication and which is considered as an alternative to conventional physical and chemical methods (Mohanpuria et al 2008)
The present study reports for the first time on the synthesis characterization and antibacterial and antifungal efficacy of B. ovalifoliolata Bal & Henry bark-extract-mediated zinc oxide nanoparticles
Drinking water pipeline bacteria and fungi species have unusual biological activities depending upon the metabolisms under temperature, pH, and pressure
Summary
The development of green processes for the synthesis of nanoparticles has been evolving into an important branch of nanotechnology as green nanotechnology deals with the safe and eco-friendly methods for nanomaterials fabrication and which is considered as an alternative to conventional physical and chemical methods (Mohanpuria et al 2008). Physical and chemical methods (Prasad et al 2012) are more popular for nanoparticle synthesis, the use of toxic compounds limits their applications (Salam et al 2012). Green synthesis of metallic nanoparticles from plants (Girija et al 2009) is been an interesting aspect as the process is ecofriendly and non-toxic. Reports on synthesis of zinc nanoparticles using plant materials are scant (Kim et al 2011)
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