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Nanosystems: Physics, Chemistry, Mathematics, 2020, Volume 11, Issue 5, Pages 601–607
DOI: https://doi.org/10.17586/2220-8054-2020-11-5-601-607
(Mi nano563)
 

This article is cited in 1 scientific paper (total in 1 paper)

CHEMISTRY AND MATERIAL SCIENCE

Synthesis and comparative photocatalytic activity of CuO layers on SiO$_{2}$ substrates

E. V. Polyakov, R. R. Tzukanov, I. V. Volkov, L. Yu. Buldakova, I. V. Baklanova, O. A. Lipina, V. P. Zhukov, Yu. V. Kuznetsova, A. P. Tutyunnik, M. A. Maximova

Institute of Solid State Chemistry UB RAS, 91, Pervomaiskaya str., Ekaterinburg, 620990, Russian Federation
Full-text PDF (665 kB) Citations (1)
Abstract: Using the thermodynamic and kinetic approaches, it was found that Cu(NH$_{3}$)$^{2+}_{4 aq}$ complex predominating at 23$^{\circ}$C spontaneously decomposes at elevated temperatures, forming CuO precipitate in a bulk solution and a layer (CuO||SiO$_{2}$) on the surface of silica glass. The rates of these heterogeneous processes are fairly well described by the 1st-order reaction of decay of the Cu(NH$_{3}$)$^{2+}_{4 aq}$ complex. The formation of the CuO precipitate and layer is a two-step kinetic process. The rate of precipitate formation dominates above 65$^{\circ}$C while the rate of the layer formation prevails below this value. The CuO$\parallel$SiO$_{2}$ material synthesized below 65 possesses an optical bandgap of (1.25 0.05) eV, which is smaller compared to the crystals of commercial CuO. The CuO||SiO$_{2}$ material displays a photocatalytic activity in the reaction of UV-decomposition of benzoquinone-hydroquinone. It was discovered that the photocatalytic activity depends on the thickness of the photocatalyst layer.
Keywords: Copper(II), oxide, layer, glass, surface, kinetics, photocatalyst.
Funding agency Grant number
Ministry of Science and Higher Education of the Russian Federation
This study has been performed in the framework of the State research program.
Received: 18.09.2020
Bibliographic databases:
Document Type: Article
Language: English
Citation: E. V. Polyakov, R. R. Tzukanov, I. V. Volkov, L. Yu. Buldakova, I. V. Baklanova, O. A. Lipina, V. P. Zhukov, Yu. V. Kuznetsova, A. P. Tutyunnik, M. A. Maximova, “Synthesis and comparative photocatalytic activity of CuO layers on SiO$_{2}$ substrates”, Nanosystems: Physics, Chemistry, Mathematics, 11:5 (2020), 601–607
Citation in format AMSBIB
\Bibitem{PolTzuVol20}
\by E.~V.~Polyakov, R.~R.~Tzukanov, I.~V.~Volkov, L.~Yu.~Buldakova, I.~V.~Baklanova, O.~A.~Lipina, V.~P.~Zhukov, Yu.~V.~Kuznetsova, A.~P.~Tutyunnik, M.~A.~Maximova
\paper Synthesis and comparative photocatalytic activity of CuO layers on SiO$_{2}$ substrates
\jour Nanosystems: Physics, Chemistry, Mathematics
\yr 2020
\vol 11
\issue 5
\pages 601--607
\mathnet{http://mi.mathnet.ru/nano563}
\crossref{https://doi.org/10.17586/2220-8054-2020-11-5-601-607}
\isi{https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=Publons&SrcAuth=Publons_CEL&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=000590876500013}
\elib{https://elibrary.ru/item.asp?id=46755541}
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  • This publication is cited in the following 1 articles:
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    Nanosystems: Physics, Chemistry, Mathematics
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