ZnO Coated Anodic 1D TiO2 Nanotube Layers: Efficient Photo-Electrochemical and Gas Sensing Heterojunction

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F17%3A39911320" target="_blank" >RIV/00216275:25310/17:39911320 - isvavai.cz</a>

Alternative codes found

RIV/49777513:23220/18:43932787 RIV/68378271:_____/18:00510399

Result on the web

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

DOI - Digital Object Identifier

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

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

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

21001 - Nano-materials (production and properties)

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

2017

Confidentiality

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

Name of the periodical

Advanced Engineering Materials

ISSN

1438-1656

e-ISSN

1527-2648

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

"1700589-1"-"1700589-10"

UT code for WoS article

000425368600021

EID of the result in the Scopus database

—