Forming and Gathering of SnO2 Nanoparticles on External Surface of High Silica TON, MFI and FAU Type Zeolites

Abstract

AbstractTin dioxide (SnO2) nano‐particles were prepared on high silica TON, MFI and FAU type zeolites by impregnation of SnCl2 solution and subsequent calcination at 873 K. XRD and SAED were used to characterize the crystalline phase, and TEM was used to characterize the morphology, the particle size and the agglomerative state of the formed nano‐materials. The nano‐particles, which possess 8 nm, 10–80 nm and 6 nm in size, were found to form on the outer surface of TON, MFI and FAU zeolites, respectively. SnO2 microcapsules and SnO2 netlike nanostructure were obtained by decomposition of SnO2‐TON and SnO2‐MFI in 40% hydrofluoric acid at room temperature. Compared with the nano‐particles formed on NaY zeolite, the special morphology and the agglomerative state of SnO2 nanostructures on TON and MFI type zeolites with one and two dimension channel system indicate that the heterogeneous framework, surface structure and property perform important function for forming and growing SnO2 nanostructure on the outer surface of the zeolites.