Antioxidant and Catalytic Activity of Biosynthesized NiO Nanoparticles using Terminalia chebula Fruit Extract

Nowadays, the biological synthesis of nanoparticles attains researchers’ interest in removing hazardouspollutants from water. Due to eco-friendliness, cost effective, non-hazardous and avoids the usage ofcatalyst and stabilizing agents. Herein, biosynthesized NiO nanoparticles were prepared at the ambientconditions by using aqueous Terminalia chebula fruit extract. Terminalia chebula fruit extract containspolyphenolic compounds, terpenoids, carbohydrates and flavonoids, which can be responsible for thenucleation of metal nanoparticles in biological synthesis. The resulted biosynthesized NiO nanoparticleswas characterized via UV, FTIR, zeta potential, XRD, EDX, SEM and TEM. The UV and XRDanalysis confirmed the formation and cubic crystalline nature of biosynthesized NiO nanoparticles,receptively. FTIR, EDX and zeta potential confirmed the functional groups, elemental compositionand surface charge. The phytochemicals present in Terminalia chebula were responsible for the reductionand stabilization of biosynthesized NiO nanoparticles. The average size of biosynthesized NiO wasfound to be 14.08 nm and spherical in shape with TEM. In addition, antioxidant and catalytic activitiesperformance of the NiO nanoparticles were also investigated. Biosynthesized NiO nanoparticles showedantioxidant and catalytic activity against DPPH and Congo red dye, overall, the experimental resultssuggested that the NiO nanoparticle could be helpful for the industrial applications.