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Effect of Antioxidants on Stability of Aqueous Solutions of Selenurea and on Properties of Lead Selenide Films Obtained with These Antioxidants

  • Inorganic Synthesis and Industrial Inorganic Chemistry
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Abstract

Spectrophotometric method was used to study the kinetics of the process in which aqueous solutions of selenurea of various compositions are oxidized. Significant differences between the stabilities of selenurea solutions were revealed in relation to the selenurea concentration and also to the acidity, or alkalinity of a medium. It was shown that the stability of selenurea solutions is affected by additives of various antioxidants: sodium sulfite Na2SO3, ascorbic acid C6H8O6, hydroxylamine chloride NH2OH·HCl, hydrazine hydrate N2H4·H2O, and tin chloride SnCl2·2H2O. It was found that using a 1 : 1 mixture of antioxidants Na2SO3 and C6H8O6 substantially raises their antioxidant activity and stabilizes the aqueous solutions of selenurea during up to five days. A hydro-chemical precipitation in the acetate—ethylenediamine reaction system in the presence of the antioxidants under study was used to obtain lead selenide films of stoichiometric composition with thicknesses of 230‒670 nm. With the Na2SO3 + C6H8O6, Na2SO3, C6H8O6, and SnCl2 antioxidants used to stabilize selenurea solutions, a tendency is observed toward a decrease in the lattice constants of PbSe films from 6.1531 ± 0.0003 to 6.1367 ± 0.0002 Å, an increase in the share of nanosize particles, and rise in the PbSe energy gap width from 0.78 to 1.0 e V.

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Acknowledgments

The authors are grateful to V.I. Voronin, senior researcher from the Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, for assistance in structural measurements and to O.A. Lipin, senior researcher from the Institute of Solid-State Chemistry, Ural Branch, Russian Academy of Sciences, for assistance in optical measurements.

The study was financially supported by Program 211 of the Government of the Russian Federation no. 02. A03.21.0006 under the State assignment (Potok research topic) no. AAAA-A18-118020190112-8.

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Authors and Affiliations

  1. Yeltsin Ural Federal University, Yekaterinburg, 620075, Russia

    V. M. Yurk, L. N. Maskaeva & V. F. Markov

  2. Ural Institute of State Firefighting Service Russian Ministry for Civil Defense, Yekaterinburg, 620062, Russia

    L. N. Maskaeva & V. F. Markov

  3. Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences, Yekaterinburg, 620990, Russia

    V. G. Bamburov

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  1. V. M. Yurk
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  2. L. N. Maskaeva
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  3. V. F. Markov
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  4. V. G. Bamburov
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Correspondence to L. N. Maskaeva.

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Yurk, V.M., Maskaeva, L.N., Markov, V.F. et al. Effect of Antioxidants on Stability of Aqueous Solutions of Selenurea and on Properties of Lead Selenide Films Obtained with These Antioxidants. Russ J Appl Chem 92, 394–403 (2019). https://doi.org/10.1134/S1070427219030091

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  • DOI: https://doi.org/10.1134/S1070427219030091

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