Formation of porous α-Fe2O3 microstructure by thermal decomposition of Fe(IO3)3

Catalytic performance of nanostructured iron oxides synthesized by thermal decomposition technique

“…3b shows that the samples F12 and F13 have a strong peaks at 2086, 2079 cm −1 corresponding to CN group [32], and broad peak at 3398-3381 cm −1 and sharp peak at 1626 cm −1 are also detected corresponding, respectively to the stretching vibration of -OH and -O(OH) groups on the surface [29]. This result is in a good agreement with XRD data which confirmed that iron cyanide hydrated is formed.…”

“…Strong broad peaks, Fig. 3a, at 3398-3381 and 1626-1600 cm −1 can be observed corresponding, respectively to the stretching vibration of -OH and -O(OH) groups on the surface [29]. The broad band appeared in the range of 1700-1610 cm −1 is likely related to the overlapping caused by the adsorbed H 2 O with NO 3 group [30,31].…”

Microstructural changes in porous hematite nanoparticles upon calcination

“…Detailed characterization of such nanoparticles or nanocrystals is still a challenging task, especially when they are porous, and several complementary methods are often needed to be able to characterize their microstructure fully. Transmission electron microscopy (TEM) and scanning electron microscopy (SEM) are two of the most widely used techniques for studying the morphology of both dense and porous hematite particles (Zhang et al, 2007;Li et al, 2007;Liao et al, 2008;He et al, 2008;Ristic & Music, 2006;Zhang et al, 2009;Li et al, 2009;Liang et al, 2010). Various X-ray powder diffraction (XRPD) line-profile analysis techniques are other important microstructural characterization methods that have been used to study the strain and crystallite size and shape of dense hematite nanocrystals/nanoparticles (Pourghahramani, Altin et al, 2008;Pourghahramani & Forssberg, 2006a,b;Pourghahramani, Palson & Forssberg, 2008).…”