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Sol-Gel Synthesis of Strontium Titanate Nanofibers by Electrospinning
J. H. Roque-Ruiz1, J. Meraz-Angel1, R. Farias2, M. Meléndez-Lira3, S. Y. Reyes-López1
1 Instituto de Ciencias Biomédicas, Universidad Autónoma de Ciudad Juárez, Envolvente del PRONAF y Estocolmo s/n, Ciudad Juárez, Chih., México C.P. 32300
2 Instituto de Ingeniería y Tecnología, Universidad Autónoma de Ciudad Juárez, Av. del Charro No. 450 Nte. Col. Partido Romero C.P. 32310
3 Physics Department, CINVESTAV-IPN, Apdo. Postal 14 – 740 México, D.F. 07360, México
received June 28, 2018, received in revised form February 28, 2019, accepted March 15, 2019
Vol. 10, No. 1, Pages 29-38 DOI: 10.4416/JCST2018-00072
Abstract
The preparation of homogeneous SrTiO3 nanofibers has been difficult and there are few publications in this field. In this research, consistent structures of strontium titanate ceramic fibers were obtained using an easy sol-gel and electrospinning methodology, giving an alternative for preparing ceramics in the form of fibrillar membranes. Two sol-gel solutions starting from Strontium nitrate and titanium tetraisopropoxyde were prepared and then mixed and homogenized with polyvinylpyrrolidone polymeric solution. The green fibers obtained from the ceramic precursors had a diameter of 140 to 180 nm. At 1000 °C the shape of fibers was preserved, with mean diameter of 103±39 nm. Based on the thermal analysis, the phase transition from tetragonal titanium oxide to the perovskite structure of strontium titanate was determined to take place at 800 °C. By infrared spectroscopy, Raman spectroscopy and X-ray diffraction analysis, it was determined that ceramic fibers at 1200 °C had a perovskite structure characteristic of strontium titanate.
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Keywords
electrospinning, perovskite, sol-gel, strontium titanate.
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