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SiO2 and TiO2 nanoparticles in Aerosol OT reverse microemulsions: Synthesis and characterization

  • Synthesis and Properties of Inorganic Compounds
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Abstract

Stable SiO2 and TiO2 organosols were prepared by hydrolyzing tetraethyl orthosilicate (TEOS) in the presence of 6–12 M NH3 and titanium(IV) isopropylate (TTIP) in reverse microemulsions of 0.12–0.25 M bis(2-ethylhexyl) sulfosuccinate (Aerosol OT, AOT) in n-decane with the aqueous pseudophase content of 2–3 vol %, 0.018–0.090 M TEOS, and 0.15–0.55 vol %, 0.003–0.025 M TTIP. The degree of hydrolysis was monitored by IR spectroscopy (for TEOS) and spectrophotometry (for TTIP). Oxide nanoparticles were characterized by photon-correlation spectroscopy (PCS) (D h = 8–100 nm) and laser electrophoresis (ζ-potential = 7.4–11.6 mV). The occurrence of surface potential made it possible to separate the oxides from the excess of surfactant by nonaqueous electrophoresis and to determine particle sizes (7–40 nm) by means of transmission electron microscopy (TEM).

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Authors and Affiliations

  1. Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, pr. Akademika Lavrent’eva 3, Novosibirsk, 630090, Russia

    M. G. Demidova, N. O. Shaparenko, T. Yu. Podlipskaya & A. I. Bulavchenko

Authors
  1. M. G. Demidova
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  2. N. O. Shaparenko
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  3. T. Yu. Podlipskaya
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  4. A. I. Bulavchenko
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Corresponding author

Correspondence to M. G. Demidova.

Additional information

Original Russian Text © M.G. Demidova, N.O. Shaparenko, T.Yu. Podlipskaya, A.I. Bulavchenko, 2017, published in Zhurnal Neorganicheskoi Khimii, 2017, Vol. 62, No. 6, pp. 729–736.

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Demidova, M.G., Shaparenko, N.O., Podlipskaya, T.Y. et al. SiO2 and TiO2 nanoparticles in Aerosol OT reverse microemulsions: Synthesis and characterization. Russ. J. Inorg. Chem. 62, 715–722 (2017). https://doi.org/10.1134/S0036023617060031

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  • DOI: https://doi.org/10.1134/S0036023617060031

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