The kinetic behavior of H2O2 decomposition in near UV-irradiated aqueous TiO2 suspensions was investigated. The effects of the H2O2 concentration, the catalyst loading, the dissolved oxygen concentration, and the light intensity on the initial photodecomposition rate were studied. The observed kinetics were treated by both the Langmuir-Hinshelwood and the Freundlich model; the latter proved more successful for characterization of the system. The H2O2 photodegradation rate was found to be directly proportional to the light intensity and it increased with the catalyst concentration up to a saturation limit. The concentration of dissolved oxygen had no significant effect on the photodecomposition rate.
- Hydrogen peroxide
- Titanium dioxide
ASJC Scopus subject areas
- Process Chemistry and Technology
- Physical and Theoretical Chemistry