Microstructural and morphological analysis of pure and Ce-doped tin dioxide nanoparticles

Abstract

Structural and morphological studies in pure and Ce-doped tin dioxide nanoparticles with high stability against particle growth were performed in samples, obtained using the polymeric precursor method and prepared at different annealing temperatures. A Ce-rich surface layer was used to control the particle size and stabilize SnO 2 against particle growth. The formation of this segregated layer can contribute to a decreased surface energy, acting in the driving force, or reducing the surface mobility. Only the cassiterite SnO 2 phase was observed below 1000 C and a secondary phase (CeO 2 ) was observed for the Ce-doped SnO 2 at temperatures higher than 1000 C, when de-mixing process occurs. The evolution of crystallite size, microstrain and morphology of the nanoparticles with annealing temperatures was investigated by X-ray diffraction (XRD), associated to Rietveld refinements, X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). #

Photoluminescence Studies on Nanocrystalline Tin Oxide Powder for Optoelectronic Devices

“…The weight percentage, R Bragg and GOF were ~11%, ~1% and ~1% were calculated for as-prepared and heat treated powders (Table1). Using the refined data, the structural model of SnO 2 was constructed and its bond length is obtained and comparable with the earlier reports [17][18] (Table 1). The SEM micrographs (Fig.5), the washed powders morphology are almost spherical in shape and average agglomerate crystal size of 0.2-0.4 μm.…”

The influence of phosphate on crystal grain growth of nanosized SnO2

“…8b gives the high resolution XPS spectrum of Sn3d taken from the P-SnO 2 sample. The SnO 2 appears a spin-orbit doublet at 486.0 eV (3d 5/2 ) and 494.5 eV (3d 3/2 ), which is consistent with the literature [21]. The high resolution XPS spectra of the O1s region, taken on the P-SnO 2 surface is shown in Fig.…”

Highly Sensing Properties Sensors Based on Ce-doped ZnO and SnO2 Nanoparticles to Ethanol Gas

“…For both oxides the average particle size were found to decrease with increasing CeO2 content as indicated in Table 1. These results show that CeO2 doping material may be acts as an inhibitor which resists the ZnO and SnO2 grain growth during the sintering temperature [Fen et al 2007 andMaciel et al 2003]. Fig.…”