Model Free Approach for Non-Isothermal Decomposition of Un-Irradiated and g-Irradiated Silver Acetate: New Route for Synthesis of Ag2O Nanoparticles
نوع المنشور
بحث أصيل
  • Mohammed Rafiq H. Siddiqui
  • Saad Alshehri
  • Ismail Kh. Warad
  • Naser M. Abd El-Salam
  • Refaat M. Mahfouz
النص الكامل
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.
Int. J. Mol. Sci. 2010, 11(9), 3600-3609; doi:10.3390/ijms11093600
بلد الناشر
نوع المنشور
Both (Printed and Online)