Synthesis of Fe/Ti oxides from a single source alkoxide precursor under inert atmosphere
- CAMARGO, Pedro H. C.
- NUNES, Giovana G.
- SÁ, Eduardo L. de
- TREMILIOSI-FILHO, Germano
- EVANS, David J.
- ZARBIN, Aldo J. G.
- SOARES, Jaísa F.
DOIAbstract
The heterometal alkoxide [FeCl{Ti2(OPr i)9}] (1) was employed as a single source precursor for the preparation of Fe/Ti oxides under inert atmosphere. Three different synthetic procedures were adopted in the processing of 1, either employing aqueous HNO3 or HCl solutions, or in the absence of mineral acids. Products were characterised by powder X-ray diffractometry, scanning electron microscopy combined with energy dispersive X-ray spectroscopy (SEM/EDS) and Raman, electron paramagnetic resonance (EPR) and Mössbauer spectroscopies. Oxide products contained titanium(IV) and either iron(III) or iron(II), depending on reaction conditions and thermal treatment temperatures. An interesting iron(III)→iron(II) reduction was observed at 1000 ...
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