Preparation of silver(I) bromide nanoparticles
Preparation of silver(I) bromide nanoparticles by solid-state thermal decomposition of Ag(Brca-TSC)(NO3)
Ensieh Shahsavania, Nourollah Feizia, Aliakbar Dehno Khalajib
Department of Chemistry, Payame Noor University, PO Box 19395-3697 Tehran, IRAN
Department of Chemistry, Faculty of Science, Golestan University, Gorgan, Iran
E-mail address: email@example.com
Abstract – Silver halides are important materials used in various fields such as high-speed photographic materials, X-ray films, medicine and antibacterial . Until now, many methods [2,3] have been used for fabricate AgX nanoparticles with various morphologies 4,5. Herein, we report the synthesis and characterization silver(I) bromide nanoparticles by solid-state thermal decomposition of Ag(Brca-TSC)(NO3). To a solution of silver(I) nitrate (0.1 mmol) in CH3CN (15 mL) is added a solution of Brca-TSC (۰٫۱ mmol in 15 mL CH3CN) and stirred for 45-60 min to form a white precipitate. Microcrystalline powder of the complex (about 0.5 g) is loaded into a crucible and then placed in the electrical furance and heated, at a rate of 10ºC/min in air, up to 600ºC.Nanoparticles of AgBr are produced after 3.5 h. The synthesized AgBr nanoparticles are characterized by XRD, SEM and TEM. The structure and the phase composition of AgBr nanoparticles, obtained after calcinationat 600 ºC for 3.5 h, have been ascertained by powder XRD analysis (Fig. 1a). The diffraction peaks at ۲θ values of 31º, ۴۴º, ۵۵º, ۶۴٫۵º and 73º can be indexed to (200), (220), (222), (400) and (420) crystal planes of the monoclinic structure of silver(I) bromide (JCPDS database No. 06.0438) [۶,۷]. XRD results are in close agreement with the FTIR spectra.Broadening of the diffracted lines indicates the higher crystallinity of AgBr nanoparticles [6,7]. In addition to the XRPD studies, the morphology, structure and size of the AgBr nanoparticles have been investigated by transmission electron microscopy (TEM) (Fig. 1b). The detailed of SEM clearly indicate similar morphologies and size of AgBr nanoparticles. They also indicate that AgBr nanoparticles remain agglomerated having almost uniform in size.