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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 (CC BY 3.0).
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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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