Anodic TiO2 nanotube walls reconstructed: Inner wall replaced by ALD TiO2 coating

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F21%3A39918168" target="_blank" >RIV/00216275:25310/21:39918168 - isvavai.cz</a>
Alternative codes found
RIV/00216305:26620/21:PU141850
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0169433221003822" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0169433221003822</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.apsusc.2021.149306" target="_blank" >10.1016/j.apsusc.2021.149306</a>

Result language
angličtina
Original language name
Anodic TiO2 nanotube walls reconstructed: Inner wall replaced by ALD TiO2 coating
Original language description
A reconstruction process of TiO2 nanotube (TNT) layers towards their superior photoelectrochemical performance and photocatalytic activity is presented. At first, TNT layers (similar to 5 mu m thick, similar to 250 nm in diameter) were prepared via electrochemical anodization to obtain double-wall (DW) TNT layers. Second, a selective chemical treatment was conducted to etch the inner wall, yielding single-wall (SW) TNT layers. Third, TNT layers were coated by an additional approx. 5.5 nm, 11 nm, and 16 nm thick TiO2 coatings, respectively, using Atomic Layer Deposition (ALD). A pronounced increase in the incident photon-to-electron conversion efficiency (reaching similar to 85% at lambda - 350 nm) was achieved on SW TNT layers coated with 11 nm thick ALD coatings compared to SW without coating (similar to 35% at lambda = 350 nm). This is due to the optimal thickness of the ALD TiO2 coating that passivates surface states and improves the separation of the photogenerated charge carriers. Photocatalytic performance of SW TNT layers with 11 nm thick ALD coatings (rate constant; k = 0.1156 min(-1)) was increased by approx. 10-times compared to that of the nowadays most reported blank DW TNT layers (rate constant; k = 0.0119 min(-1)).
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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