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




Model Free Approach for Non-Isothermal Decomposition of Un-Irradiated and g-Irradiated Silver Acetate: New Route for Synthesis of Ag2O Nanoparticles - Download this document for free, or read online. Document in PDF available to download.

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.



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. View Full-Text

Keywords: non-isothermal decomposition; γ-irradiation; silver oxide; nanoparticles non-isothermal decomposition; γ-irradiation; silver oxide; nanoparticles





Author: Mohammed Rafiq H. Siddiqui 1, Saad Alshehri 1, Ismail Kh. Warad 1, Naser M. Abd El-Salam 2 and Refaat M. Mahfouz 1,*

Source: http://mdpi.com/



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