Kim, Moonsu ORCID: 0000-0002-2395-9308, Lee, Jaewon, Je, Minyeong, Heo, Bumgi, Yoo, Hyeonseok, Choi, Heechae ORCID: 0000-0002-9390-6607, Choi, Jinsub ORCID: 0000-0003-1675-7318 and Lee, Kiyoung ORCID: 0000-0003-2432-6614 (2021). Electric field-driven one-step formation of vertical p-n junction TiO2 nanotubes exhibiting strong photocatalytic hydrogen production. J. Mater. Chem. A, 9 (4). S. 2239 - 2248. CAMBRIDGE: ROYAL SOC CHEMISTRY. ISSN 2050-7496
Full text not available from this repository.Abstract
In this study, vertically aligned p-n junction TiO2 nanotubes can be formed by anodization of the Ti substrate following the addition of a high electric field in a Pd precursor-containing electrolyte. The bottom region of the TiO2 nanotubes with a high concentration of Pd because of the high electric field which was induced to be p-type. In contrast, the region with a low Pd concentration (top of the TiO2 nanotubes) was determined to be n-type, similar to the pristine TiO2. The concentration profile of the dopant in TiO2 nanotubes was investigated via TOF-SIMS and XPS. Defect formation energies in TiO2 nanotubes were estimated using density-functional theory calculation to understand the p-n junction formation. The p-n junction TiO2 nanotubes showed a high photocatalytic hydrogen production rate of 25.2 mu L cm(-2) h(-1) under solar light irradiation as a result of the enhancement of visible light photoactivity.
Item Type: | Journal Article | ||||||||||||||||||||||||||||||||||||
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URN: | urn:nbn:de:hbz:38-583070 | ||||||||||||||||||||||||||||||||||||
DOI: | 10.1039/d0ta10062e | ||||||||||||||||||||||||||||||||||||
Journal or Publication Title: | J. Mater. Chem. A | ||||||||||||||||||||||||||||||||||||
Volume: | 9 | ||||||||||||||||||||||||||||||||||||
Number: | 4 | ||||||||||||||||||||||||||||||||||||
Page Range: | S. 2239 - 2248 | ||||||||||||||||||||||||||||||||||||
Date: | 2021 | ||||||||||||||||||||||||||||||||||||
Publisher: | ROYAL SOC CHEMISTRY | ||||||||||||||||||||||||||||||||||||
Place of Publication: | CAMBRIDGE | ||||||||||||||||||||||||||||||||||||
ISSN: | 2050-7496 | ||||||||||||||||||||||||||||||||||||
Language: | English | ||||||||||||||||||||||||||||||||||||
Faculty: | Unspecified | ||||||||||||||||||||||||||||||||||||
Divisions: | Unspecified | ||||||||||||||||||||||||||||||||||||
Subjects: | no entry | ||||||||||||||||||||||||||||||||||||
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URI: | http://kups.ub.uni-koeln.de/id/eprint/58307 |
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