Cost-effective and eco-friendly synthesis of titanium dioxide (TiO<sub>2</sub>) nanoparticles using fruit’s peel agro-waste extracts: characterization, <i>in vitro</i> antibacterial, antioxidant activities AjmalNoushin SaraswatKeerti BakhtMd. Afroz RiadiYassine AhsanMohammed Jawed NoushadMd. 2019 <p>Biosynthetic procedure is the best alternative to the preparation of nonmaterials as the challenges faced by the scientist from the last few decades. Present research reports cost-effective, inexpensive eco-friendly synthesis of titanium dioxide nanoparticles using a methanolic extract of fruits peel agro-waste. X-ray diffraction spectrum of identified TiO<sub>2</sub>NPs found noncrystalline in nature. Fourier transform infrared showed O–H, C = O, C–O, and C–H functional groups present in the fruit peel involved in the biosynthesis of TiO<sub>2</sub>NPs. The prominent peak at 1708, 1720 and 1700 cm<sup>−1</sup> observed in the spectrum attributed to O–Ti–O stretching in Plum, Kiwi and Peach mediated TiO<sub>2</sub>NPs. The SEM images of all three TiO<sub>2</sub>NPs revealed cylindrical in shape. The size of TiO<sub>2</sub>NPs synthesized from Plum, Kiwi and Peach were found to be 47.1 and 63.2, 54.1 and 85.1 and 200 nm, respectively. All the TiO<sub>2</sub>NPs exhibited size- and dose-dependent antibacterial and antioxidant activities.</p>