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Vertically Aligned Core-Shell PbTiO3@TiO2 Heterojunction Nanotube Array for Photoelectrochemical and Photocatalytic Applications SCIE SCOPUS

Title
Vertically Aligned Core-Shell PbTiO3@TiO2 Heterojunction Nanotube Array for Photoelectrochemical and Photocatalytic Applications
Authors
Jang, Jum SukAhn, Chang WonWon, Sung SikKim, Ju HunChoi, WonyongLee, Byoung-SeobYoon, Jang-HeeKim, Hyun GyuLee, Jae Sung
Date Issued
2017-07
Publisher
AMER CHEMICAL SOC
Abstract
Vertically aligned core-shell PbTiO3@TiO2 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 PbTiO3@TiO2 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.
Keywords
SENSITIZED SOLAR-CELLS; VISIBLE-LIGHT; CONDUCTING SUBSTRATE; HYDROGEN-PRODUCTION; WATER OXIDATION; NANOWIRE-ARRAY; HEMATITE; FABRICATION; PHOTOANODE; DEGRADATION
URI
https://oasis.postech.ac.kr/handle/2014.oak/50786
DOI
10.1021/acs.jpcc.7b03081
ISSN
1932-7447
Article Type
Article
Citation
JOURNAL OF PHYSICAL CHEMISTRY C, vol. 121, no. 28, page. 15063 - 15070, 2017-07
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최원용CHOI, WONYONG
Div of Environmental Science & Enginrg
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