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Kinetic Studies For The Non-Isothermal Decomposition Of Un-Irradiated and γ-Irradiated Ruthenium(III) Acetylacetonate

Mon, 2013-04-15 16:25 — Ismail Warad
Journal Title, Volume, Page: 
Radiation Effects and Defects in Solids: Incorporating Plasma Science and Plasma Technology Volume 164, Issue 4, 2009
Year of Publication: 
2009
Link: 
http://www.tandfonline.com/doi/abs/10.1080/10420150701414272#preview
Authors: 
R. M. Mahfouz
Department of Chemistry, College of Science, King Saud University, PO Box 2455, Riyadh-11451, Saudi Arabia
Sh. A. Al-Ahmari
Department of Chemistry, College of Science, King Saud University, PO Box 2455, Riyadh-11451, Saudi Arabia
I. Kh. Warad
Department of Chemistry, College of Science, King Saud University, PO Box 2455, Riyadh-11451, Saudi Arabia
Current Affiliation: 
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
[email protected]
S. I. Al-Resayes
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
K. R. Raslan
Natural Science (Mathematics), Community College of Science, King Saud University, Riyadh, Saudi Arabia
A. M. Al-Otaibi
Department of Chemistry, College of Science, King Saud University, PO Box 2455, Riyadh-11451, Saudi Arabia
Preferred Abstract (Original): 
Kinetic studies for the non-isothermal decomposition of un-irradiated and γ-irradiated ruthenium(III) acetylacetonate in air were carried out. The results show that the decomposition proceeds in one major step in the temperature range of 150–250 °C with the formation of RuO2 as a final solid residue for un-irradiated Ru(acac)3. For γ -irradiated Ru(acac)3 with 102 KGy total γ-ray dose, the decomposition goes eventually to completion with almost 100% decomposition and proceeds in one major step, which contains four overlapping decomposition stages in the temperature range of 200–320 °C. The kinetics is shown to be non-isothermal, using both model-fitting and model-free approaches. Infrared (IR) spectroscopy and X-ray powder diffraction techniques were employed to follow the chemical composition of the solid residue obtained at different temperatures.
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