The catalytic activity of Ni NPs can be utilized to alleviate environment pollution caused by industrial effluents containing organic dyes. In the present work, a green method was employed for the synthesis of Nickel (Ni) nanoparticles using Polyphenolic rich Terminalia Chebula fruit aqueous extract and evaluated its catalytic activity against carcinogenic congo red dye along with antioxidant activity. The UV-Vis peak at 395 nm revealed the formation and monodispersed nature of nanoparticle. FTIR studies confirmed that polyphenolic and alkaloids were utilized in the formation of nanoparticles. The XRD established formation of Ni nanoparticles of FCC. SEM indicated the agglomeration of nanoparticles and TEM established the spherical shape with an average size about 6-8 nm. This study also evaluated the catalytic and antioxidant activities of green synthesized Ni NPs. Catalytic degradation of carcinogenic congo red dye completed within 20 mints, degradation of the congo red dye found to be first order kinetics, antioxidant activity against DPPH found maximum to 100 μg/ml and EC50 as 65.01.

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