Details
| Original language | English |
|---|---|
| Article number | 999 |
| Journal | CATALYSTS |
| Volume | 9 |
| Issue number | 12 |
| Early online date | 27 Nov 2019 |
| Publication status | Published - Dec 2019 |
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
- Cadmium sulfide, Heterojunctions, Heterostructures, Nanotubes, Planar structures, Titanium dioxide, Tungsten trioxide, Z-scheme
ASJC Scopus subject areas
- Chemical Engineering(all)
- Catalysis
- Chemistry(all)
- Physical and Theoretical Chemistry
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In: CATALYSTS, Vol. 9, No. 12, 999, 12.2019.
Research output: Contribution to journal › Article › Research › peer review
}
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.
N1 - Funding information: This research was funded by Russian Foundation for Basic Research (RFBR) via a research Grant 18– 29–23035 mk and the Saint-Petersburg State University via a Research Grant (Pure ID 32706707).
PY - 2019/12
Y1 - 2019/12
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 - Cadmium sulfide
KW - Heterojunctions
KW - Heterostructures
KW - Nanotubes
KW - Planar structures
KW - Titanium dioxide
KW - Tungsten trioxide
KW - Z-scheme
UR - http://www.scopus.com/inward/record.url?scp=85075922676&partnerID=8YFLogxK
U2 - 10.3390/catal9120999
DO - 10.3390/catal9120999
M3 - Article
VL - 9
JO - CATALYSTS
JF - CATALYSTS
SN - 2073-4344
IS - 12
M1 - 999
ER -