Photoelectrochemical Behavior of the Ternary Heterostructured Systems CdS/WO3/TiO2

Anna A. Murashkina, Tair V. Bakiev , Yurii M. Artemev, Aida V. Rudakova, Alexei V. Emeline, Detlef W. Bahnemann

Research output

Abstract

In this article, we report the results of comparative studies of photoelectrochemical behavior of the binary CdS/TiO2 and WO3/TiO2 and ternary CdS/WO3/TiO2 heterostructures based on titania nanotube and planar structures. Physical–chemical characterization by XRD, XPS, and electron microscopy methods together with electrochemical impedance spectroscopy measurements confirm a successful formation of heterostructured electrodes, both nanotube-based and planar. The results of photoelectrochemical studies of the heterostructures demonstrate a significant difference in their behavior depending on the structure geometry and the character of the formed heterojunctions. It is concluded that nanotube-based heterostructure electrodes can be characterized by a stochastic set of different heterojunctions while planar systems demonstrate well-ordered heterojunctions with a strictly defined electron transfer direction. Particularly, we demonstrate the possibility of the realization of Z-scheme of photoexcitation and charge separation in ternary planar systems under visible light irradiation.
Original languageEnglish
JournalCatalysts
Volume9
Issue number12
Publication statusPublished - 27 Nov 2019

Fingerprint

Ternary systems
ternary systems
Heterojunctions
heterojunctions
nanotubes
Nanotubes
microscopy
electrodes
planar structures
polarization (charge separation)
photoexcitation
electron microscopy
electron transfer
titanium
impedance
Electrodes
irradiation
Photoexcitation
geometry
Electrochemical impedance spectroscopy

Scopus subject areas

  • Electrochemistry
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Cite this

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title = "Photoelectrochemical Behavior of the Ternary Heterostructured Systems CdS/WO3/TiO2",
abstract = "In this article, we report the results of comparative studies of photoelectrochemical behavior of the binary CdS/TiO2 and WO3/TiO2 and ternary CdS/WO3/TiO2 heterostructures based on titania nanotube and planar structures. Physical–chemical characterization by XRD, XPS, and electron microscopy methods together with electrochemical impedance spectroscopy measurements confirm a successful formation of heterostructured electrodes, both nanotube-based and planar. The results of photoelectrochemical studies of the heterostructures demonstrate a significant difference in their behavior depending on the structure geometry and the character of the formed heterojunctions. It is concluded that nanotube-based heterostructure electrodes can be characterized by a stochastic set of different heterojunctions while planar systems demonstrate well-ordered heterojunctions with a strictly defined electron transfer direction. Particularly, we demonstrate the possibility of the realization of Z-scheme of photoexcitation and charge separation in ternary planar systems under visible light irradiation.",
keywords = "heterojunctions, heterostructures, Z-scheme, planar structures, nanotubes, titanium dioxide, cadmium sulfide, tungsten trioxide, heterojunctions, heterostructures, Z-Scheme, planar structures, nanotubes, titanium dioxide, cadmium sulfide, tungsten trioxide",
author = "Murashkina, {Anna A.} and Bakiev, {Tair V.} and Artemev, {Yurii M.} and Rudakova, {Aida V.} and Emeline, {Alexei V.} and Bahnemann, {Detlef W.}",
year = "2019",
month = "11",
day = "27",
language = "English",
volume = "9",
journal = "Catalysts",
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TY - JOUR

T1 - Photoelectrochemical Behavior of the Ternary Heterostructured Systems CdS/WO3/TiO2

AU - Murashkina, Anna A.

AU - Bakiev , Tair V.

AU - Artemev, Yurii M.

AU - Rudakova, Aida V.

AU - Emeline, Alexei V.

AU - Bahnemann, Detlef W.

PY - 2019/11/27

Y1 - 2019/11/27

N2 - In this article, we report the results of comparative studies of photoelectrochemical behavior of the binary CdS/TiO2 and WO3/TiO2 and ternary CdS/WO3/TiO2 heterostructures based on titania nanotube and planar structures. Physical–chemical characterization by XRD, XPS, and electron microscopy methods together with electrochemical impedance spectroscopy measurements confirm a successful formation of heterostructured electrodes, both nanotube-based and planar. The results of photoelectrochemical studies of the heterostructures demonstrate a significant difference in their behavior depending on the structure geometry and the character of the formed heterojunctions. It is concluded that nanotube-based heterostructure electrodes can be characterized by a stochastic set of different heterojunctions while planar systems demonstrate well-ordered heterojunctions with a strictly defined electron transfer direction. Particularly, we demonstrate the possibility of the realization of Z-scheme of photoexcitation and charge separation in ternary planar systems under visible light irradiation.

AB - In this article, we report the results of comparative studies of photoelectrochemical behavior of the binary CdS/TiO2 and WO3/TiO2 and ternary CdS/WO3/TiO2 heterostructures based on titania nanotube and planar structures. Physical–chemical characterization by XRD, XPS, and electron microscopy methods together with electrochemical impedance spectroscopy measurements confirm a successful formation of heterostructured electrodes, both nanotube-based and planar. The results of photoelectrochemical studies of the heterostructures demonstrate a significant difference in their behavior depending on the structure geometry and the character of the formed heterojunctions. It is concluded that nanotube-based heterostructure electrodes can be characterized by a stochastic set of different heterojunctions while planar systems demonstrate well-ordered heterojunctions with a strictly defined electron transfer direction. Particularly, we demonstrate the possibility of the realization of Z-scheme of photoexcitation and charge separation in ternary planar systems under visible light irradiation.

KW - heterojunctions

KW - heterostructures

KW - Z-scheme

KW - planar structures

KW - nanotubes

KW - titanium dioxide

KW - cadmium sulfide

KW - tungsten trioxide

KW - heterojunctions

KW - heterostructures

KW - Z-Scheme

KW - planar structures

KW - nanotubes

KW - titanium dioxide

KW - cadmium sulfide

KW - tungsten trioxide

M3 - Article

VL - 9

JO - Catalysts

JF - Catalysts

SN - 2073-4344

IS - 12

ER -