Institute of Chemistry;
Technology and Metallurgy;
University of Belgrade(National Institute);
Department of Catalysis and Chemical Engineering;
Njegoševa 12;
Belgrade;
Republic of Serbia;
Department of Catalysis and Chemical Reaction Engineering;
National Institute of Chemistry;
Hajdrihova 19;
Ljubljana;
Slovenia;
Quantum chemical calculation; Density functional theory; Azo dye; Reaction mechanism; Photocatalytic degradation; Hydroxyl radical; Hammett equation; Substituent effect;