期刊
ELECTROCHEMISTRY COMMUNICATIONS
卷 98, 期 -, 页码 82-86出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2018.11.020
关键词
TiO2; Cu doped TiO2; Photocatalytic activity; Intrinsic copper decoration
资金
- ERC
- DFG
- Erlangen DFG cluster of excellence EAM [EXC 315]
- DFG funCOS
- Operational Programme Research, Development and Education-European Regional Development Fund of the Ministry of Education, Youth and Sports of the Czech Republic [CZ.02.1.01/0.0/0.0/15_003/0000416]
In this work, we grow intrinsically Cu-doped TiO2 nanotubes (TiNTs) by self-organizing anodization of Ti-Cu binary alloys. We demonstrate that up to a copper concentration of 1.5 at.% in the alloy, self-ordered Cu2+ doped nanotubes can be grown. Under UV illumination the Cu2+ ion-doped oxide structures can be converted to nanotubes that carry metallic nanoparticles (NPs) uniformly decorated on top of the TiNTs. We investigate the formation of these metallic nanoparticles under UV illumination by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance (EPR). The resulting intrinsic copper-doped and decorated TiNTs have a strongly enhanced photocatalytic activity for H-2 evolution in comparison to pristine TiNTs. Key is the light-induced conversion of the intrinsic Cu dopant to metallic copper nanoparticles that act as a stable co-catalyst for H-2 generation.
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