Microwave-assisted one-step biosynthesis of titanium dioxide nanoparticles: Antibacterial, antioxidant, and photocatalytic properties
Waseem Ahmad, Sanjay Kumar, Sarfaraz Ahmed
Abstract
The present study provides an environmentally benevolent synthesis of titanium dioxide nanoparticles (TiO2 NPs). Morphological characteristics of the fabricated nanoparticles were assessed by using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and UV-Spectroscopy. The XRD pattern of the synthesized nanoparticles showed that the nanoparticles had a tetragonal crystalline structure with a particle size of 20–40 nm. The photocatalytic efficacy of the developed nanomaterials was investigated in relation to indigo carmine, bromothymol blue, and rhodamine b dye. The presence of a photocatalyst leads to an improved performance, causing a decline in dye concentration with increasing irradiation time. The highest dye degradation of about 95 % was observed against indigo carmine dye. The green synthesized TiO2 NPs exhibited a significant zone of inhibition (23 mm) in antibacterial activity against Bacillus at the concentration of 70 mg/mL. The developed nanoparticles demonstrate 81.29 % DPPH radical scavenging activity at the concentration of 60 μg/mL.