Transparent and conducting tin oxide is of great interest due to their potential technological applications, such as: gas sensors, energy conversion, catalysts and others. Appropriate doping can further enhance the conductivity of the SnO2 material with little loss of transparency. Isolated tin iron oxide (Sn1-xFexO2-d) fibers with x(%)= 0, 2, 4, 6, 8 and 10 were prepared by electrospinning technique. Anhydrous SnCl4, FeCl3, different alcohols, chloroform and PEO polymer were used as precursor materials. Appropriate mixture of these reagents defines the deposition solution. The samples were deposited on glass substrate and annealed at 500o C. The fibers are characterized by scanning electron microscopy (SEM), impedance spectroscopy and temperature dependence current-voltage measurements. The results are presented and discussed, including a transport phenomenal model simulation.The homogeneous fibers with diameter between 2 to 10 mm were used with sensor purpose. Thus, water vapor sensor responses were also measured and the experimental results are tested using the Freundlich isotherms model.Also, powder and films deposited on glass substrate were prepared with the same fiber deposition solution and annealed at 500o C. The samples were structurally characterized by Raman spectroscopy, Mossbauer spectroscopy, and X-ray diffraction (XRD). The results indicate the formation of SnO2 rutile structure with iron ions occupying two different sites, where one of them is related to oxygen vacancy nearest neighbor.

Preparation and characterization of Sn1-xFexO2-d fibers, powders, and films

247th National Meeting (2014)

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