Abstract
Three-dimensional flower-like SnO2-based structures have been produced by the alkaline hydrothermal treatment of t-SnO2 powder with no additive and in the presence of aminoterephthalic acid (ATPA). The synthesis products have been characterized by a variety of physicochemical techniques (scanning electron microscopy, transmission electron microscopy, Raman and IR spectroscopies, X-ray diffraction, and others). The results demonstrate that raising the ATPA concentration in the reaction mixture changes the morphology of the materials and leads to the SnO2 → SnO2/Sn3O4 → Sn3O4 phase transformation in the structures through the formation of SnO x nonstoichiometric tin oxide phases with 1 < x < 2. Hydrothermal treatment of the starting reagents in the presence of ≤75 wt % ATPA leads to the formation of hierarchical structures dominated by a nonstoichiometric tin oxide, which is thermally unstable at t ≥ 500°C. The morphology and phase composition of the synthesized structures have been shown to have a significant effect on the electronic conductivity of the material.
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Original Russian Text © T.M. Zima, I.A. Bataev, 2017, published in Neorganicheskie Materialy, 2017, Vol. 53, No. 12, pp. 1311–1317.
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Zima, T.M., Bataev, I.A. Synthesis and characterization of three-dimensional flower-like tin dioxide-based structures. Inorg Mater 53, 1279–1285 (2017). https://doi.org/10.1134/S0020168517120196
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DOI: https://doi.org/10.1134/S0020168517120196