Electrochemical and photoelectrochemical characterization of photoanodes based on titania nanotubes modified by a BiVO4 thin film and gold nanoparticles
Abstract
Titania nanotubes (TNT) modified with thin films of bismuth vanadate (BiVO4) and gold nanoparticles (GNP) were photoelectrochemically characterized as photoanodes for water photooxidation. Presence of bismuth vanadate enhanced efficiency of photocurrent generation in comparison with pristine TNTs under visible light illumination. Besides an extended range of absorbed light, the presence of both BiVO4 and GNP reduced the charge transfer resistance as confirmed by using electrochemical impedance spectroscopy. A possible mechanism of photoexcited charge-carrier transfer based on the locations of valence and conduction bands of TiO2 and BiVO4 has been proposed. The photocurrent of the most active photoanode (Ti/TiO2/Au/BiVO4/Au) reached a stable value of about 123 μA cm−2 and was nearly 3.5 times higher than registered for pure TiO2 and c.a. 8 times higher than recorded for BiVO4.
Citations
-
2 3
CrossRef
-
0
Web of Science
-
2 1
Scopus
Authors (5)
Cite as
Full text
full text is not available in portal
Keywords
Details
- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
ELECTROCHIMICA ACTA
no. 222,
pages 421 - 428,
ISSN: 0013-4686 - Language:
- English
- Publication year:
- 2016
- Bibliographic description:
- Trzciński K., Szkoda M., Siuzdak K., Sawczak M., Lisowska-Oleksiak A.: Electrochemical and photoelectrochemical characterization of photoanodes based on titania nanotubes modified by a BiVO4 thin film and gold nanoparticles// ELECTROCHIMICA ACTA. -Vol. 222, (2016), s.421-428
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.electacta.2016.10.194
- Verified by:
- Gdańsk University of Technology
seen 148 times
Recommended for you
The Effect of Laser Re-Solidification on Microstructure and Photo-Electrochemical Properties of Fe-Decorated TiO2 Nanotubes
- P. Kupracz,
- K. Grochowska,
- J. Karczewski
- + 2 authors