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Kinetic Studies of Isothermal Decomposition of Unirradiated and γ-Irradiated Gallium Acetylacetonate: New Route for Synthesis of Gallium Oxide Nanoparticles

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Thu, 2013-03-14 16:52 — Ismail Warad
Journal Title, Volume, Page: 
Progress in Reaction Kinetics and Mechanism, Volume 37, Number 3, 2012, pp. 249-262(14)
Year of Publication: 
2012
Link: 
http://www.ingentaconnect.com/content/stl/prk/2012/00000037/00000003/art00002?to...
Authors: 
R.M. Mahfouz
Department of Chemistry, College of Science, King Saud University, PO Box 2455, Riyadh-11451, Saudi Arabia
[email protected]
Kh.M. Al-Khamis
Department of Chemistry, College of Science, King Saud University, PO Box 2455, Riyadh-11451, Saudi Arabia
M.R.H. Siddiqui
Department of Chemistry, College of Science, King Saud University, PO Box 2455, Riyadh-11451, Saudi Arabia
N.S. Al-Hokbany
Department of Chemistry, College of Science, King Saud University, PO Box 2455, Riyadh-11451, Saudi Arabia
I. Warad
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Current Affiliation: 
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
[email protected]
N.M. Al-Andis
Department of Chemistry, College of Science, King Saud University, PO Box 2455, Riyadh-11451, Saudi Arabia
Preferred Abstract (Original): 
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.
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