Preparation of polypyrrole sensitized TiO2 nanotube arrays hybrids for efficient photoelectrochemical water splitting

被引：44
作者：
Luo, Jie [1 ]
Ma, Yi [2 ]
Wang, Haiyan [1 ]
Chen, Jiaoyan [1 ]
机构：
[1] Cent South Univ Forestry & Technol, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China
[2] Hangzhou Environm Grp Co Ltd, Hangzhou 310022, Zhejiang, Peoples R China
来源：
ELECTROCHIMICA ACTA | 2015年 / 167卷
关键词：
polypyrrole; TiO2 nanotube arrays; electropolymerization; photosensitizer; water splitting; SOLAR-CELLS; PHOTOCATALYTIC ACTIVITY; POLYANILINE; ELECTROLYTE; POLYMERS;
D O I：
10.1016/j.electacta.2015.03.097
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Stable polypyrrole-TiO2 nanotube arrays hybrids (PPy-TNTs) have been prepared by facile anodization and potentiostatic polymerization methods. The morphology and structure of PPy-TNTs are characterized by SEM, XRD, XPS. The amount of deposited PPy can be easily adjusted by electropolymerization time. UV-vis diffuse reflection spectra show that the polypyrrole can act as visible-light photosensitizer and the electrochemical impedance spectra suggest that the formed p-n junctions between PPy and TNTs can facilitate the charge separation and transfer. The photocurrent density of PPy-TNTs under simulated solar illumination (AM1.5, 100 mW/cm(2)) is about 2.5 times compared with that of pristine TNTs. Incident photon to current conversion efficiency (IPCE) spectrum of PPy-TNTs increases in UV and visible light region. Moreover, The PPy-TNTs hybrids show much higher photoelectrochemical stability than the pure TNTs. (C) 2015 Elsevier Ltd. All rights reserved.
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收藏
页码：119 / 125
页数：7
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