سال انتشار: ۱۳۸۷

محل انتشار: همایش بین المللی ژئولیت ایران

تعداد صفحات: ۶

نویسنده(ها):

a Pourahmad –
sh Sohrabnezhad –
m.s sajadi –

چکیده:

We report the optical and structure properties of NiS and CoS nanoparticles in ZSM-5 zeolite. The
samples were obtained by sulfidation of the Ni2+ and Co2+ ion-exchange ZSM-5 zeolites in a Na2S solution at
room temperature. The optical properties of the samples were studied by UV-Vis spectroscopy. Their
crystalline structure and morphology were studied by XRD and scanning electron microscopy. BET and IR
spectra results reveal that nanoparticles could grow on the surface area of ZSM-5 zeolites. Absorption peaks
at higher energy than the fundamental absorption edge of bulk NiS and CoS indicate quantum confinement
effect in nanoparticles as a consequence of their small size. The absorption spectra show that the optical band
gap varies in the range 3.91-4.72 eV.