Kinetic studies of isothermal decomposition of unirradiated and γ-irradiated gallium acetylacetonate: New route for synthesis of gallium oxide nanoparticles

Abstract

Isothermal decomposition of unirradiated and γ-irradiated gallium acetylacetonate Ga(acac)3 with 103 kGy total γ-ray dose was carried out in static air. The isothermal operating temperatures were 160, 170, 180 and 190°C. The kinetics of decomposition were followed using both model-fitting and model-free approaches. The results of model fitting application on the investigated data showed that the decomposition behaviour was best described by phase-boundary controlled reaction (R2). Kinetic parameters of the decomposition process were calculated and evaluated. Analysis of the data using model free approach signifies the dependency of Ea on extent of conversion (α). Pre-γ-irradiation of gallium acetylacetonate Ga(acac)3 with 103 kGy total γ-ray dose has almost no effect on the kinetic parameters. © 2012 Science Reviews 2000 Ltd.