International Journal of Nano Dimension (Int. J. Nano Dimens.) Degradation of aqueous solution of 4-Chloro-2-Nitrophenol in nano-TiO2/H2O2 system Volume 5 (2014) Issue 1, March 2014 2024 02 29 Degradation of aqueous solution of 4-Chloro-2-Nitrophenol in nano-TiO2/H2O2 system 10.7508/ijnd.2014.01.011 EN A. Mirzaee M.Sc. student, Department of chemistry, Ahar Branch, Islamic Azad University, Ahar, Iran. P. Gharbani 2Department of chemistry, Ahar Branch, Islamic Azad University, Ahar, Iran. Journal Article 2024 02 29               The present work is focused on the degradation of 4-chloro-2-nitrophenol in aqueous solution containing nano titanium dioxide, hydrogen peroxide and the combination of nano-TiO2/H2O2. The effect of experimental parameters, such as the amount of nano- TiO2 concentration of H2O2, initial concentration of 4-chloro-2-nitrophenol and pH on the reaction was investigated. Experimental data obtained under different conditions describe the dependency of degradation rate on the above mentioned parameters. The optimum conditions of the degradation treatment were: [H2O2]=100 mg/L;  [nano- TiO2]=0.004 g/250 mL; initial pH=10 and initial 4-chloro-2-nitrophenol concentration=15 mg/L. Consequently, kinetic parameters were experimentally determined and a pseudo-first-order kinetic was observed.