Solid-State Synthesis of Direct Z-Scheme Cu2O/WO3 Nanocomposites with Enhanced Visible-Light Photocatalytic Performance

In this paper, we report the preparation of visible-light active direct Z-scheme Cu2O/WO3 nanocomposite photocatalyst by a solid-state reaction avoiding the otherwise inevitable formation of CuWO4 phase in wet syntheses. Structure,...

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Main Authors:	Hassan Ali, Ali Can Guler, Milan Masar, Pavel Urbanek, Michal Urbanek, David Skoda, Pavol Suly, Michal Machovsky, Dusan Galusek, Ivo Kuritka
Format:	Article
Language:	English
Published:	MDPI AG 2021-02-01
Series:	Catalysts
Subjects:	photocatalyst Cu<sub>2</sub>O/WO<sub>3</sub> Z-scheme nanocomposite reaction mechanism
Online Access:	https://www.mdpi.com/2073-4344/11/2/293

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spelling	doaj-8e860349f8e046bb99203fe3475d395a2021-02-24T00:02:11ZengMDPI AGCatalysts2073-43442021-02-011129329310.3390/catal11020293Solid-State Synthesis of Direct Z-Scheme Cu<sub>2</sub>O/WO<sub>3</sub> Nanocomposites with Enhanced Visible-Light Photocatalytic PerformanceHassan Ali0Ali Can Guler1Milan Masar2Pavel Urbanek3Michal Urbanek4David Skoda5Pavol Suly6Michal Machovsky7Dusan Galusek8Ivo Kuritka9Centre of Polymer Systems, Tomas Bata University in Zlin, tr. T. Bati 5678, 760 01 Zlin, Czech RepublicCentre of Polymer Systems, Tomas Bata University in Zlin, tr. T. Bati 5678, 760 01 Zlin, Czech RepublicCentre of Polymer Systems, Tomas Bata University in Zlin, tr. T. Bati 5678, 760 01 Zlin, Czech RepublicCentre of Polymer Systems, Tomas Bata University in Zlin, tr. T. Bati 5678, 760 01 Zlin, Czech RepublicCentre of Polymer Systems, Tomas Bata University in Zlin, tr. T. Bati 5678, 760 01 Zlin, Czech RepublicCentre of Polymer Systems, Tomas Bata University in Zlin, tr. T. Bati 5678, 760 01 Zlin, Czech RepublicCentre of Polymer Systems, Tomas Bata University in Zlin, tr. T. Bati 5678, 760 01 Zlin, Czech RepublicCentre of Polymer Systems, Tomas Bata University in Zlin, tr. T. Bati 5678, 760 01 Zlin, Czech RepublicCentre for Functional and Surface Functionalized Glass, Alexander Dubček University of Trenčín, 911 50 Trenčín, SlovakiaCentre of Polymer Systems, Tomas Bata University in Zlin, tr. T. Bati 5678, 760 01 Zlin, Czech RepublicIn this paper, we report the preparation of visible-light active direct Z-scheme Cu<sub>2</sub>O/WO<sub>3</sub> nanocomposite photocatalyst by a solid-state reaction avoiding the otherwise inevitable formation of CuWO<sub>4</sub> phase in wet syntheses. Structure, morphology, and thermal and optical properties of prepared WO<sub>3</sub> nanoplatelets decorated by Cu<sub>2</sub>O were investigated by XRD, Raman spectroscopy, SEM/TEM, combined thermogravimetric (TG)/differential scanning calorimetry (DSC) analysis, and UV–VIS spectroscopy. The photocatalytic performance of the prepared samples under UV and visible light was studied through monitoring discoloration of methylene blue under illumination by selected wavelengths, allowing for the distinguishing between the contributions of the two semiconductive components. Experimental results showed that the decoration of WO<sub>3</sub> nanoplates by Cu<sub>2</sub>O nanoparticles led to an improvement in photocatalytic performance, regardless of used LED (Light-Emitting Diode) wavelength, even at low concentrations. By using scavengers selectively blocking reactive species involved in the discoloration reaction, we determined that the Cu<sub>2</sub>O/WO<sub>3</sub> nanocomposite exhibited the characteristics of direct Z-scheme-type photocatalyst.https://www.mdpi.com/2073-4344/11/2/293photocatalystCu<sub>2</sub>O/WO<sub>3</sub>Z-schemenanocompositereaction mechanism
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Hassan Ali Ali Can Guler Milan Masar Pavel Urbanek Michal Urbanek David Skoda Pavol Suly Michal Machovsky Dusan Galusek Ivo Kuritka
spellingShingle	Hassan Ali Ali Can Guler Milan Masar Pavel Urbanek Michal Urbanek David Skoda Pavol Suly Michal Machovsky Dusan Galusek Ivo Kuritka Solid-State Synthesis of Direct Z-Scheme Cu<sub>2</sub>O/WO<sub>3</sub> Nanocomposites with Enhanced Visible-Light Photocatalytic Performance Catalysts photocatalyst Cu<sub>2</sub>O/WO<sub>3</sub> Z-scheme nanocomposite reaction mechanism
author_facet	Hassan Ali Ali Can Guler Milan Masar Pavel Urbanek Michal Urbanek David Skoda Pavol Suly Michal Machovsky Dusan Galusek Ivo Kuritka
author_sort	Hassan Ali
title	Solid-State Synthesis of Direct Z-Scheme Cu<sub>2</sub>O/WO<sub>3</sub> Nanocomposites with Enhanced Visible-Light Photocatalytic Performance
title_short	Solid-State Synthesis of Direct Z-Scheme Cu<sub>2</sub>O/WO<sub>3</sub> Nanocomposites with Enhanced Visible-Light Photocatalytic Performance
title_full	Solid-State Synthesis of Direct Z-Scheme Cu<sub>2</sub>O/WO<sub>3</sub> Nanocomposites with Enhanced Visible-Light Photocatalytic Performance
title_fullStr	Solid-State Synthesis of Direct Z-Scheme Cu<sub>2</sub>O/WO<sub>3</sub> Nanocomposites with Enhanced Visible-Light Photocatalytic Performance
title_full_unstemmed	Solid-State Synthesis of Direct Z-Scheme Cu<sub>2</sub>O/WO<sub>3</sub> Nanocomposites with Enhanced Visible-Light Photocatalytic Performance
title_sort	solid-state synthesis of direct z-scheme cu<sub>2</sub>o/wo<sub>3</sub> nanocomposites with enhanced visible-light photocatalytic performance
publisher	MDPI AG
series	Catalysts
issn	2073-4344
publishDate	2021-02-01
description	In this paper, we report the preparation of visible-light active direct Z-scheme Cu<sub>2</sub>O/WO<sub>3</sub> nanocomposite photocatalyst by a solid-state reaction avoiding the otherwise inevitable formation of CuWO<sub>4</sub> phase in wet syntheses. Structure, morphology, and thermal and optical properties of prepared WO<sub>3</sub> nanoplatelets decorated by Cu<sub>2</sub>O were investigated by XRD, Raman spectroscopy, SEM/TEM, combined thermogravimetric (TG)/differential scanning calorimetry (DSC) analysis, and UV–VIS spectroscopy. The photocatalytic performance of the prepared samples under UV and visible light was studied through monitoring discoloration of methylene blue under illumination by selected wavelengths, allowing for the distinguishing between the contributions of the two semiconductive components. Experimental results showed that the decoration of WO<sub>3</sub> nanoplates by Cu<sub>2</sub>O nanoparticles led to an improvement in photocatalytic performance, regardless of used LED (Light-Emitting Diode) wavelength, even at low concentrations. By using scavengers selectively blocking reactive species involved in the discoloration reaction, we determined that the Cu<sub>2</sub>O/WO<sub>3</sub> nanocomposite exhibited the characteristics of direct Z-scheme-type photocatalyst.
topic	photocatalyst Cu<sub>2</sub>O/WO<sub>3</sub> Z-scheme nanocomposite reaction mechanism
url	https://www.mdpi.com/2073-4344/11/2/293
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Solid-State Synthesis of Direct Z-Scheme Cu<sub>2</sub>O/WO<sub>3</sub> Nanocomposites with Enhanced Visible-Light Photocatalytic Performance

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