Model free approach for non-isothermal decomposition of un-irradiated and γ-irradiated silver acetate: new route for synthesis of Ag(2)O nanoparticles.
Kinetic studies for the non-isothermal decomposition of unirradiated and γ-irradiated silver acetate with 10(3) 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 Ag(2)O 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 α 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 (CH(3)COOAg) at 200 °C for 2 hours only led to the formation of pure Ag(2)O mono-dispersed nanoparticles. X-ray diffraction, FTIR and SEM techniques were employed for characterization of the synthesized nanoparticles.
Department of Chemistry, College of Science, King Saud University, P. O. Box 2455, Riyadh-11451, Saudi Arabia; E-Mails: rafiqs@ksu.edu.sa (M.R.H.S.); alshehri@ksu.edu.sa (S.A.).
Mohmmed Rafiq H
MR
Siddiqui
Saad
S
Alshehri
Ismail Kh
IKh
Warad
Naser M
NM
Abd El-Salam
Refaat M
RM
Mahfouz
D000085:Acetates / Q000737:chemistry* / Q000528:radiation effects; D005720:Gamma Rays; D006358:Hot Temperature; D053768:Metal Nanoparticles / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D018030:Silver Compounds / Q000737:chemistry* / Q000528:radiation effects
D000085:Acetates; D010087:Oxides; D018030:Silver Compounds; C103100:silver acetate; C040225:disilver oxide