Characteristics of copper sulfide nanoparticles obtained in the copper sulfate–sodium thiosulfate system

Тип публикации: статья из журнала

Год издания: 2017

Идентификатор DOI: 10.1134/S0022476617070150

Ключевые слова: copper sulfides, dynamic light scattering, hydrosols, nanoparticles, optical spectroscopy, powder XRD, TEM, XPS

Аннотация: Stable hydrosols of copper sulfide nanoparticles are synthesized by heating aqueous solutions with different ratios of sodium thiosulfate and copper sulfate in the presence of polyvinylpyrrolidone and studied by a number of physicochemical methods in situ (optical spectroscopy, dynamic light scattering) and ex situ (transmission electron microscopy, powder X-ray diffraction, X-ray photoelectron spectroscopy). The main product is CuS covellite nanoparticles with some impurities of other phases (Cu2S, Cu1,8S, Cu7S4). With an increase in the initial molar ratio S2O 2− 3 / Cu from 0.2 to 5 the nanoparticle size increases from 1-5 nm to 30-50 nm and then decreases to 4 nm at a ratio of 10. A substantial increase in the intensity of plasmon absorption within 800-1500 nm is observed during the formation of planar nanoparticles with a lateral size of about 30 nm at S2O 2− 3:Cu = 5. A band gap obtained from both direct and indirect optical absorption spectra of sulfides (2.6 eV and 1.7 eV respectively) remains constant for all particles. © 2017, Pleiades Publishing, Ltd.

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Издание

Журнал: Journal of Structural Chemistry

Выпуск журнала: Vol. 58, Is. 7

Номера страниц: 1383-1390

ISSN журнала: 00224766

Издатель: Maik Nauka Publishing / Springer SBM

Авторы

  • Murasheva K.S. (Siberian Federal University, Krasnoyarsk, Russian Federation)
  • Saikova S.V. (Siberian Federal University, Krasnoyarsk, Russian Federation)
  • Vorobiev S.A. (Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation)
  • Romanchenko A.S. (Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation)
  • Mikhlin Y.L. (Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation)

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