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Vertically Aligned Core-Shell [email protected] Heterojunction Nanotube Array for Photoelectrochemical and Photocatalytic Applications

Authors
  • Jang, Jum Suk
  • Ahn, Chang Won
  • Won, Sung Sik
  • Kim, Ju Hun
  • Choi, Wonyong
  • Lee, Byoung-Seob
  • Yoon, Jang-Hee
  • Kim, Hyun Gyu
  • Lee, Jae Sung
Publication Date
Jul 01, 2017
Source
[email protected]
Keywords
License
Unknown
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Abstract

Vertically aligned core-shell [email protected] heterojunction nanotube arrays are fabricated on F:SnO2 (FTO) glass substrate via a unique three-step process: an electron beam vapor deposition of Ti thin film on FTO, anodic oxidation of the Ti film to TiO2 nanotubes, and finally formation of PbTiO3 perovskite layer at the inner wall of the TiO2 nanotubes. The [email protected] nanotube array exhibits dramatically improved photoactivity relative to TiO2 nanotubes or PbTiO3/TiO2 composite powders in photoelectrochemical water splitting and photocatalytic isopropyl alcohol decomposition under visible light irradiation (>420 nm). In the core-shell heterojunction electrodes, PbTiO3 serves as a visible light responsive inorganic photosensitizer with its small band gap and forms a heterojunction with TiO2 for effective charge separation. / 1 / 1 / 5 / scie / scopus

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