Electrochemical and photoelectrochemical characterization of photoanodes based on titania nanotubes modified by a BiVO4 thin film and gold nanoparticles

被引：23
作者：
Trzcinski, K. [1 ]
Szkoda, M. [1 ]
Siuzdak, K. [2 ]
Sawczak, M. [2 ]
Lisowska-Oleksiak, A. [1 ]
机构：
[1] Gdansk Univ Technol, Fac Chem, Narutowicza 11-12, PL-80233 Gdansk, Poland
[2] Szewalski Inst Fluid Flow Machinery, Ctr Plasma & Laser Engn, Fiszera 14, PL-80231 Gdansk, Poland
来源：
ELECTROCHIMICA ACTA | 2016年 / 222卷
关键词：
BiVO4; photoanode; visible light; titania nanotubes; PHOTOCATALYTIC ACTIVITY; TIO2; NANOTUBES; OPTICAL-PROPERTIES; IONIC LIQUIDS; SOLAR-CELLS; BIMEVOX ME; PART; PERFORMANCE; ARRAYS; FABRICATION;
D O I：
10.1016/j.electacta.2016.10.194
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
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 mu A cm(-2) and was nearly 3.5 times higher than registered for pure TiO2 and c.a. 8 times higher than recorded for BiVO4. (C) 2016 Elsevier Ltd. All rights reserved.
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收藏
页码：421 / 428
页数：8
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