Solid-State Synthesis of Direct Z-Scheme Cu<sub>2</sub>O/WO<sub>3</sub> Nanocomposites with Enhanced Visible-Light Photocatalytic Performance
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,...
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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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