Add time:07/20/2019         Source:sciencedirect.com

Green synthesis of nanoparticles via plant extract is a novel method to spread over in the field of nanoscience and nanotechnology. Nanoparticles prepared by biological route are an eco-friendly as well as yields good results than the conventional methods. In this present work we have synthesized TiO2 nanoparticles from Titanium tetra chloride using orange peel extract. The prepared nanoparticles were characterized by different techniques such as powder XRD, field emission electron microscopy (FE-SEM) and Fourier transform infrared spectroscopy (FT-IR) to determine phase purity, crystallinity, morphology and bonding nature respectively. UV-Visible and photoluminescence (PL) spectra was perceived to identify the optical properties of the nanoparticles. The elemental composition was confirmed by X-ray energy dispersive spectroscopy (EDX). The humidity sensor studies of the nanoparticles were measured at different humidity atmosphere (RH 5% to RH 98%). The response and recovery time and the sensitivity factor Sf were calculated. The antibacterial studies of the nanoparticles reveals good activity against Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli and Pseudomonuas aeruginosa bacteria respectively.The cytotoxicity of anatase TiO2 NPs was studied in A549 cell lines using MTT assay.Overall results shows that the nanoparticles prepared via biological method exhibits good results compare to nanoparticles prepared by chemical method.

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