Background: Utilization of plant extracts and agricultural waste has a great
impact for the synthesis of AgNPs. Banana peels are such important agro waste which
attracted us to use for the synthesis of silver nanoparticles. The biochemicals present in
it have attracted us to use such banana peels.
Methods: Thus, we report herein a cost-effective and environment-friendly synthesis of
silver nanoparticles using Bhimkal (Musa balbisiana) peel aqueous extract as biological
waste. About 5 g of freshly dried peels taken in 100 mL of water were shaken and heated
at 80°C for 1 hour. The filtrate from the resultant solution was stored at 4°C and used as
reducing as well as stabilizing agent for the preparation of AgNPs from AgNO3. We
monitored the formation of silver nanoparticles by various spectroscopic techniques.
Results: All the particles are almost spherical in morphology and the diameter of the
mostly monodispersed AgNPs is in the range of 30-70 nm with an average size of 44.24
nm. Among the three stages of development (unripe, ripe, and blacken), we have found
the ripening stage as most efficient in the highest yielding of AgNPs because of
maximum presence of phenol containing biological macromolecules. The synthesized
AgNPs showed moderate antibacterial activity against both gram negative bacteria as
well as gram positive bacteria.
Conclusion: The advantage of our biomimetic route to silver nanoparticles lies in the
fact that we utilize peels as biological waste material both for the generation and
stabilization of silver nanoparticles.