International Journal of Nano Dimension (Int. J. Nano Dimens.) Synthesis and characterization of Cobalt Oxide nanoparticles using Momordica charantia and its photocatalytic activity Volume 13 (2022) Issue 3, August 2022 2024 02 03 Synthesis and characterization of Cobalt Oxide nanoparticles using Momordica charantia and its photocatalytic activity 10.22034/ijnd.2022.1956438.2137 EN Samuel Alwin David PG & Research Department of Chemistry, V. O. Chidambaram College, Tuticorin, India 0000-0003-3730-9274 Asirvatham Doss PG & Research Department of Botany, V. O. Chidambaram College, Tuticorin, India 0000-0002-8149-3091 Rajamma Powel Praveen Pole PG & Research Department of Zoology, V. O. Chidambaram College, Tuticorin, India 0000-0003-4703-4948 Thankappan Pushpabai Kumari Pushpa Rani Department of Microbiology, St. Mary’s College (Autonomous), Tuticorin, India 0000-0001-7897-5287 Raveendran Padma Latha Reshmi Department of Biotechnology, Malankara Catholic College, Mariagiri, Tamilnadu, India 0009-0008-5161-8341 Ramakrishnan Rajalakshmi PG & Research Department of Botany, V. O. Chidambaram College, Tuticorin, India 0000-0003-2803-6374 Journal Article 2024 02 03 Synthesizing plant-derived nanoparticles attract attention due to both their broad-spectrum biological applications and sustainable production. This paper describes the production of Cobalt oxide nanoparticles (Co3O4 NPs) using M. charantia leaf extract. The Uv–Vis absorption spectrum of them has peaks at 309 and 595nm. FTIR spectroscopy reveals bands at 580cm-1 and 667cm-1 and confirms the formation of Co3O4. The particle size was determined by XRD to be between 44.68 and 89.20nm. The Field Emission Scanning Electron Microscopy (FESEM) showed that Co3O4 NPs were irregular in shape and between 40 and 90nm in size. Further, the dye degrading capacity of this nanoparticle was ascertained. The dye degrading capacity of Co3O4 NPs exhibited was 81.50% obtained at 90 minutes of light irradiation.