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Synthesis of hydrated tungsten(VI) oxide sols by peptization

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Abstract

A method has been developed for the synthesis of hydrated tungsten oxide hydrosols, with this method being based on potassium tungstate hydrolysis followed by peptization of the formed precipitate. The influence of the conditions of precipitation, aging, and washing of the precipitate on the particle phase composition and shape and the degree of precipitate peptization has been studied. Hydrosol-particle sizes have been determined by different methods. It has been found that the dispersed phase of the hydrosols consists mainly of platelike particles of hydrated tungsten oxide WO3 · 2H2O with a number-average size of 52 nm. The sols are stable to aggregation in a pH range of 3.0–4.5. The zeta potential of the particles ranges from–33 to–38 mV.

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Authors and Affiliations

  1. D. Mendeleev University of Chemical Technology of Russia, Miusskaya pl. 9, Moscow, 125047, Russia

    A. V. Aleksandrov, N. N. Gavrilova & V. V. Nazarov

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  1. A. V. Aleksandrov
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  2. N. N. Gavrilova
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  3. V. V. Nazarov
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Correspondence to A. V. Aleksandrov.

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Original Russian Text © A.V. Aleksandrov, N.N. Gavrilova, V.V. Nazarov, 2017, published in Kolloidnyi Zhurnal, 2017, Vol. 79, No. 2, pp. 115–123.

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Aleksandrov, A.V., Gavrilova, N.N. & Nazarov, V.V. Synthesis of hydrated tungsten(VI) oxide sols by peptization. Colloid J 79, 173–180 (2017). https://doi.org/10.1134/S1061933X17020028

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  • DOI: https://doi.org/10.1134/S1061933X17020028

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