International Science Community Association International Research Journal of Environmental Sciences 14 4 2025 10 22 Degradation studies of Organic Pollutants using green synthesized NiO NPs from Clove Extract and investigation of antimicrobial properties 1 7 EN Angel D. Deva 1 Department of Chemistry & Research Centre, Scott Christian College (Autonomous), Nagercoil-629003 (Affiliated to Manonmaniam Sundaranar University, Tirunelveli), Tamil Nadu, India Celin T. Sumitha 2 Department of Chemistry & Research Centre, Scott Christian College (Autonomous), Nagercoil-629003 (Affiliated to Manonmaniam Sundaranar University, Tirunelveli), Tamil Nadu, India Raj G. Allen Gnana 3 Department of Chemistry & Research Centre, Scott Christian College (Autonomous), Nagercoil-629003 (Affiliated to Manonmaniam Sundaranar University, Tirunelveli), Tamil Nadu, India > Research Paper 2025 3 13 2025 10 22 In this study nanoscaled Nickel oxide nanoparticles were synthesized using clove extract under atmospheric condition through green synthesis. The synthesized nanoparticles were characterized using FT-IR, UV-Visible spectroscopy, EDAX, SEM and XRD techniques. Using Debye Scherer’s formula, the crystallite size was calculated. The presence of Ni was confirmed using EDAX. Using the synthesized nanoparticle, degradation of Congo Red dye was carried out. The effect of various parameters on dye degradation like catalyst dosage, dye concentration, pH were investigated systematically. The results revealed that NiO nanocatalyst are an efficient catalyst to carry out the degradation of Organic dyes. Copyright@ International Science Community Association