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ZnO coated anodic 1D TiO2 nanotube layers : efficient photo-electrochemical and gas sensing heterojunction

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23220%2F18%3A43932787" target="_blank" >RIV/49777513:23220/18:43932787 - isvavai.cz</a>

  • Alternative codes found

    RIV/00216275:25310/17:39911320 RIV/68378271:_____/18:00510399

  • Result on the web

    <a href="http://onlinelibrary.wiley.com/doi/10.1002/adem.201700589/abstract" target="_blank" >http://onlinelibrary.wiley.com/doi/10.1002/adem.201700589/abstract</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1002/adem.201700589" target="_blank" >10.1002/adem.201700589</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    ZnO coated anodic 1D TiO2 nanotube layers : efficient photo-electrochemical and gas sensing heterojunction

  • Original language description

    The authors demonstrate, in this work, a fascinating synergism of a high surface area heterojunction between TiO2 in the form of ordered 1D anodic nanotube layers of a high aspect ratio and ZnO coatings of different thicknesses, produced by atomic layer deposition. The ZnO coatings effectively passivate the defects within the TiO2 nanotube walls and significantly improve their charge carrier separation. Upon the ultraviolet and visible light irradiation, with an increase of the ZnO coating thickness from 0.19 to 19 nm and an increase of the external potential from 0.4–2 V, yields up to 8-fold enhancement of the photocurrent density. This enhancement translates into extremely high incident photon to current conversion efficiency of ≈95%, which is among the highest values reported in the literature for TiO2 based nanostructures. In addition, the photoactive region is expanded to a broader range close to the visible spectral region, compared to the uncoated nanotube layers. Synergistic effect arising from ZnO coated TiO2 nanotube layers also yields an improved ethanol sensing response, almost 11-fold compared to the uncoated nanotube layers. The design of the high-area 1D heterojunction, presented here, opens pathways for the light- and gas-assisted applications in photocatalysis, water splitting, sensors, and so on.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    21000 - Nano-technology

Result continuities

  • Project

    <a href="/en/project/LO1607" target="_blank" >LO1607: RICE - New technologies and concepts for smart industrial system</a><br>

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2018

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Advanced Engineering Materials

  • ISSN

    1438-1656

  • e-ISSN

  • Volume of the periodical

    20

  • Issue of the periodical within the volume

    2

  • Country of publishing house

    DE - GERMANY

  • Number of pages

    10

  • Pages from-to

    1-10

  • UT code for WoS article

    000425368600021

  • EID of the result in the Scopus database

    2-s2.0-85030122766