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论文类型：期刊论文

发表时间：2011-12-01

发表刊物：JOURNAL OF NANOPARTICLE RESEARCH

收录刊物：Scopus、SCIE、EI

卷号：13

期号：12

页面范围：6813-6820

ISSN号：1388-0764

关键字：TiO2 nanotube arrays; Polyaniline; Electrodeposition; Rhodamine B; Photoelectrocatalysis

摘要：Self-organized anodic TiO2 nanotube arrays were sensitized with polyaniline by a simple electrodeposite method. The morphological and structural properties studied by scanning electron microscopy and fourier transform infrared spectroscopy reveal the successful deposition of polyaniline on the nanotube arrays. The polyaniline-sensitized TiO2 nanotube arrays exhibit a distinguishable red shift on the absorption spectrum. Electrochemical impedance investigation attested to a significant improvement of the interfacial electron-transfer kinetics for promoted electron-hole effective separation. The as-prepared samples showed a high efficiency for the photoelectrocatalytic degradation of rhodamine B under visible-light irradiation (lambda > 400 nm). The enhanced photoelectrocatalytic activity could be attributed to the extended absorption in the visible-light region by the polyaniline and the effective separation of photogenerated carriers driven by the photoinduced potential difference generated at the polyaniline/TiO2 nanotube arrays interface.