Laser-assisted pyrolysis in a continuous flow reactor has been applied to synthesize iron-oxide nanoparticles. The scope of the present contribution was to investigate the possibility of increasing the reaction yield in order to obtain powder amounts suitable for practical applications. To this aim, a gas mixture containing Fe(CO)5and N2O has been submitted to CO2c.w. laser pyrolysis. As a reaction sensitizer gas, SF6has been preferred to C2H4to avoid ethylene fragmentation in N2O presence and the formation of iron carbides. Due to unexpected SF6dissociation, the synthesis process led to the preferential formation of iron fluoride compounds. Powder samples, submitted to calcining treatment (400 °C, 3 h), showed an almost complete transformation to α- and γ-iron oxides retaining the nanostructure feature of the powder.
All Science Journal Classification (ASJC) codes
- Surfaces, Coatings and Films
Martelli, S., Mancini, A., Giorgi, R., Alexandrescu, R., Cojocaru, S., Crunteanu, A., Voicu, I., Balu, M., & Morjan, I. (2000). Production of iron-oxide nanoparticles by laser-induced pyrolysis of gaseous precursors. Applied Surface Science, 154, 353 - 359. https://doi.org/10.1016/S0169-4332(99)00385-2