Gopalappa H., Yogendra K., and Mahadevan K. M. “Solar Photocatalytic Degradation of Commercial Azo Dye Acid Orange 7 by Synthesized CaZnO2 Nanoparticle As an Effective Catalyst”. International Journal of Research in Chemistry and Environment (IJRCE), vol. 2, no. 3, June 2012, pp. 39-43, https://ijrce.org/index.php/ijrce/article/view/297.