Journal
ELECTROCHIMICA ACTA
Volume 331, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2019.135374
Keywords
TiO2 nanotube layers; Single-wall; H-2 Surface reduction; Photoelectrochemistry; Photocatalysis
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Funding
- European Research Council (ERC) [638857]
- Ministry of Education, Youth and Sports of the Czech Republic [LM2015082, LQ1601]
- ESIF [NFP313010T598]
- Operational Program Research and Development [ITMS:26210120010]
- Scientific Grant Agency of the Slovak Republic [VEGA 1/0712/18]
- Slovak Research and Development Agency [APVV-17-0324]
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In this work, a two-step treatment of TiO2 nanotube (TNT) layers towards enhanced photocatalytic performance is presented. TNT layers with a thickness of similar to 7 mu m and an average inner diameter of similar to 190 nm were prepared via electrochemical anodization of Ti foil in a fluoride containing ethylene glycolbased electrolyte. To improve the photocatalytic activity of the produced TNT layers a two-step post-treatment was conducted. First, the inner shell of the native double-wall TNT layers was removed via a mild pre-annealing followed by a selective etching treatment of the inner shell in piranha solution yielding single-wall TNT layers. Second, reduction via annealing in H-2/Ar atmosphere was performed. The resulting Ti3+ doped single-wall TNT layers possess 100% enhancement of photocatalytic activity compared to their non-treated counterparts. (C) 2019 Elsevier Ltd. All rights reserved.
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