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Int. J. Mol. Sci. 2010, 11(9), 3600-3609; doi:10.3390/ijms11093600
Article

Model Free Approach for Non-Isothermal Decomposition of Un-Irradiated and g-Irradiated Silver Acetate: New Route for Synthesis of Ag2O Nanoparticles

1
, 1
, 1, 2
 and 1,*
1 Department of Chemistry, College of Science, King Saud University, P. O. Box 2455, Riyadh-11451, Saudi Arabia 2 Department of Natural Sciences, Riyadh Community College, King Saud University, P. O. Box 28095, Riyadh-11437, Saudi Arabia
* Author to whom correspondence should be addressed.
Received: 5 August 2010 / Revised: 26 August 2010 / Accepted: 19 September 2010 / Published: 27 September 2010
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Abstract

Kinetic studies for the non-isothermal decomposition of unirradiated and γ‑irradiated silver acetate with 103 kGy total γ-ray doses were carried out in air. The results showed that the decomposition proceeds in one major step in the temperature range of (180–270 °C) with the formation of Ag2O as solid residue. The non-isothermal data for un‑irradiated and γ-irradiated silver acetate were analyzed using Flynn-Wall-Ozawa (FWO) and nonlinear Vyazovkin (VYZ) iso-conversional methods. These free models on the investigated data showed a systematic dependence of Ea on a indicating a simple decomposition process. No significant changes in the thermal decomposition behavior of silver acetate were recorded as a result of γ-irradiation. Calcinations of γ-irradiated silver acetate (CH3COOAg) at 200 °C for 2 hours only led to the formation of pure Ag2O mono-dispersed nanoparticles. X-ray diffraction, FTIR and SEM techniques were employed for characterization of the synthesized nanoparticles.
Keywords: non-isothermal decomposition; γ-irradiation; silver oxide; nanoparticles non-isothermal decomposition; γ-irradiation; silver oxide; nanoparticles
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Siddiqui, M.R.H.; Alshehri, S.; Warad, I.K.; El-Salam, N.M.A.; Mahfouz, R.M. Model Free Approach for Non-Isothermal Decomposition of Un-Irradiated and g-Irradiated Silver Acetate: New Route for Synthesis of Ag2O Nanoparticles. Int. J. Mol. Sci. 2010, 11, 3600-3609.

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