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The photocatalytic efficiency of the prepared Calcium aluminate (CaAl2O4) nanoparticle was investigated against color induced by Coralene Violet 3R and Disperse Blue 2BL dyes. The CaAl2O4 nanoparticle was prepared by a simple solution combustion method and the average crystallite size was determined by XRD and SEM studies. Experiments were conducted to determine the influencing parameters of dye degradation such as catalyst dosage, solution concentration and pH of dye solution. The treatment with prepared calcium aluminate (CaAl2O4) nanoparticle was proved to be effective in removing the color of 87.94% (0.3g/100ml catalyst dose, pH 3) and 79.82% (0.6g/100ml catalyst dose, pH 7) for Coralene Violet 3R and Disperse Blue 2BL in aqueous medium at 30ppm concentration of dyes. Thus, the CaAl2O4 nanoparticle was found to be more effective to degrade Coralene Violet 3R dye in presence of sunlight in a relatively short interval of time. Keywords— Azo dye, CaAl2O4, Coralene Violet 3R, Catalyst, Disperse Blue 2BL, Nanoparticle, Azo dyes.

Decolorization of Synthetic Coralene Violet 3R and Disperse Blue 2BL Azo Dyes Using Photoactive Calcium Aluminate Nanoparticle in Presence of Sunlight