[Barde et. al., Vol.4 (Iss.12: SE): December, 2017] ISSN: 2454-1907 [New Frontiers in Science: A Paradigm Shift to Policy Planning] DOI: 10.5281/zenodo.1163777 Http://www.ijetmr.com©International Journal of Engineering Technologies and Management Research [98] VISIBLE LIGHT IRRADIATED PHOTCATALYTIC DEGRADATION OF ORANGE II DYE IN PRESENCE OF ZnO NANOPARTICLES Veer Singh Barde *1 , Brijesh Pare 2 , Shivpriya Pare 3 , Satish Piplode 4 *1, 2, 3, 4 Laboratory of Photocatalysis, Department of Chemistry, Goverment Madhav Science P G College, (af. Vikram University), Ujjain, MP 456 010, India Abstract: Zinc oxide nanoparticles were obtained by chemical precipitation method using zinc nitrate and aqueous solution of sodium hydroxide as precursors. The ZnO nanoparticles exhibited excellent photocatalytic activity for Orange-II dye degradation under visible light irradiation. ZnO nanoparticles are easy to recover and can be used upto three times without loss of degradation activity. We observed that Fenton reagent showed good activity for Orange II dye decolourization and degradation. Photocatalytic degradation of Orange II dye using H 2 O 2 /Fe 3+ has also been studied and optimum conditions for the decolourization and degradation of dye has been established. Keywords: ZnO Nanoparticles; Orange-II Dye; Photo-catalytic Degradation; Visible Light. Cite This Article: Veer Singh Barde, Brijesh Pare, Shivpriya Pare, and Satish Piplode. (2017). “VISIBLE LIGHT IRRADIATED PHOTCATALYTIC DEGRADATION OF ORANGE II DYE IN PRESENCE OF ZnO NANOPARTICLES.” International Journal of Engineering Technologies and Management Research, 4(12: SE), 98-103. DOI: 10.5281/zenodo.1163777. 1. Introduction In the textile industries, during manufacturing and processing operations large amount of dyes are lost to the effluents and these colored dye effluents create severe environmental pollution issues by discharging toxic and potential carcinogenic substances into the aquatic sources. 1 Therefore, some new treatment methods are required for the removal of persistent dye molecules into converting them in harmless compounds in water. 2-5 These effluents generated from these industries when contains considerable amounts of dyes causes coloration of water and poses a threat to aquatic life as well. 6 Moreover, their existence in drinking water constitutes a potential human health hazard. Hence, it is crucial to eliminate these dyes from water. 7-8 Advanced oxidation processes (AOPs) have been popular for degradation of organic pollutants in recent years, due to its effectiveness and environmentally safe nature. These processes are based on the production of . OH radicals and for degradation they attacks on most of the organic molecules without any specific selectively. 9-10 Photo-catalysis using semiconductor has been widely studied for its potential application in environmental protection and solar energy transformation. In the past few years many catalysts