Abstract
Nanobiotechnology is emerging as a rapid growing field with its applications in nanoscience and technology for the purpose of built-up new materials at the nanoregime. Nanoparticles produced by plant extracts are more stable, and the rate of synthesis is faster than that in the case of other organisms. In this paper we report the biosynthesis of zinc oxide nanoparticles (ZnO NPs). Structural, morphological, particle size, and optical properties of the synthesized nanoparticles have been characterized by using UV–Vis spectroscopy, Fourier transform infrared spectroscopy, field emission scanning electron microscope, energy-dispersive X-ray spectroscopy, atomic-force microscopy, zeta potential, X-ray diffraction, and photoluminescence intensity. The UV–Vis spectrum showed an absorption peak at 380 nm that reflects surface plasmon resonance. The optical measurements were attributed to the band gap 3.19 eV at pH 12. The zeta potential value of −36.4 eV revealed the surface charge of green synthesized ZnO NPs. The antioxidant activity was estimated by both 1,1-diphenyl-2-picrylhydrazyl and reducing power assay. Green synthesized ZnO NPs showed maximum inhibition (65.23 %) and absorbance (0.6 a.u). This approach offers environmentally beneficial alternative by eliminating hazardous chemicals and promotes pollution prevention by the production of nanoparticles in their natural environment.
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The corresponding author is highly grateful to UGC-SPMVV, Sri Padmavati Women’s University, Tirupati, for sanctioning the project under the scheme of innovative proposals.
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Sushma, N.J., Mahitha, B., Mallikarjuna, K. et al. Bio-inspired ZnO nanoparticles from Ocimum tenuiflorum and their in vitro antioxidant activity. Appl. Phys. A 122, 544 (2016). https://doi.org/10.1007/s00339-016-0069-9
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DOI: https://doi.org/10.1007/s00339-016-0069-9