سال انتشار: ۱۳۸۶
محل انتشار: پنجمین کنگره بین المللی مهندسی شیمی
تعداد صفحات: ۶
Sattar Ghader – Department of Chemical Engineering, Faculty of Engineering, Shahid Bahonar University, Kerman, Iran
Mehrdad Manteghian – Department of Chemical Engineering, Faculty of Engineering, Tarbiat Modares University, Tehran, Iran
The paper describes measurement of induction time in reaction crystallization of silver nanoparticles at different temperatures and supersaturations and compares it with classical nucleation theory. Silver nanoparticles are synthesized by reaction of silver nitrate with hydrazine in the presence of sodium citrate as stabilizer. Induction time is estimated by absorption-time graph obtained by monitoring the absorption of solution after creation of supersaturation. The results show that induction time decreases with increasing supersaturation and temperature. The classical nucleation theory can predict well experimental data. Interfacial tension is estimated at different temperatures and ompared with two correlation for calculation of interfacial tension.