Cauliflower-like CeO2: TiO2 Hybrid Nanostructures with Extreme Photocatalytic and Self-Cleaning Properties

Salih Veziroglu, Katharina Röder, Ole Gronenberg, Alexander Vahl, Oleksandr Polonsky, Thomas Strunskus, Horst-Günter Rubahn, Lorenz Kienle, Jost Adam, Jacek Fiutowski, Franz Faupel , Oral Cenk Aktas

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

In recent years, heterogeneous photocatalysis has gained enormous interest due to increasing concerns about environmental pollution. Here we propose a facile approach to synthesize cauliflower-like CeO 2 -TiO 2 hybrid structures by magnetron reactive sputtering, exhibiting an extremely high photocatalytic activity. While heating and air-quenching of the sputter deposited TiO 2 thin film (first layer) triggered the formation of a nanocrack network, the second heat-treatment led to transformation of the CeO 2 film (second layer) into CeO 2 nanoclusters (NCs). We attribute the resulting high photocatalytic activity to the confined structure of the CeO 2 NCs and the CeO 2 -TiO 2 interface, which allows Ce 3+ /Ce 4+ dynamic shifting. In addition to high photocatalytic activity in an aqueous medium, the prepared CeO 2 -TiO 2 hybrid structures exhibited significant self-cleaning properties in air (non-aqueous).

OriginalsprogEngelsk
TidsskriftNanoscale
Vol/bind11
Udgave nummer20
Sider (fra-til)9840-9844
Antal sider6
ISSN2040-3364
DOI
StatusUdgivet - 2019

Fingeraftryk

Nanoclusters
Cleaning
Nanostructures
Photocatalysis
Reactive sputtering
Air
Magnetron sputtering
Quenching
Pollution
Heat treatment
Heating
Thin films

Citer dette

Veziroglu, S., Röder, K., Gronenberg, O., Vahl, A., Polonsky, O., Strunskus, T., ... Aktas, O. C. (2019). Cauliflower-like CeO2: TiO2 Hybrid Nanostructures with Extreme Photocatalytic and Self-Cleaning Properties. Nanoscale, 11(20), 9840-9844. https://doi.org/10.1039/C9NR01208G
Veziroglu, Salih ; Röder, Katharina ; Gronenberg, Ole ; Vahl, Alexander ; Polonsky, Oleksandr ; Strunskus, Thomas ; Rubahn, Horst-Günter ; Kienle, Lorenz ; Adam, Jost ; Fiutowski, Jacek ; Faupel , Franz ; Aktas, Oral Cenk. / Cauliflower-like CeO2 : TiO2 Hybrid Nanostructures with Extreme Photocatalytic and Self-Cleaning Properties. I: Nanoscale. 2019 ; Bind 11, Nr. 20. s. 9840-9844.
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title = "Cauliflower-like CeO2: TiO2 Hybrid Nanostructures with Extreme Photocatalytic and Self-Cleaning Properties",
abstract = "In recent years, heterogeneous photocatalysis has gained enormous interest due to increasing concerns about environmental pollution. Here we propose a facile approach to synthesize cauliflower-like CeO 2 -TiO 2 hybrid structures by magnetron reactive sputtering, exhibiting an extremely high photocatalytic activity. While heating and air-quenching of the sputter deposited TiO 2 thin film (first layer) triggered the formation of a nanocrack network, the second heat-treatment led to transformation of the CeO 2 film (second layer) into CeO 2 nanoclusters (NCs). We attribute the resulting high photocatalytic activity to the confined structure of the CeO 2 NCs and the CeO 2 -TiO 2 interface, which allows Ce 3+ /Ce 4+ dynamic shifting. In addition to high photocatalytic activity in an aqueous medium, the prepared CeO 2 -TiO 2 hybrid structures exhibited significant self-cleaning properties in air (non-aqueous).",
author = "Salih Veziroglu and Katharina R{\"o}der and Ole Gronenberg and Alexander Vahl and Oleksandr Polonsky and Thomas Strunskus and Horst-G{\"u}nter Rubahn and Lorenz Kienle and Jost Adam and Jacek Fiutowski and Franz Faupel and Aktas, {Oral Cenk}",
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Veziroglu, S, Röder, K, Gronenberg, O, Vahl, A, Polonsky, O, Strunskus, T, Rubahn, H-G, Kienle, L, Adam, J, Fiutowski, J, Faupel , F & Aktas, OC 2019, 'Cauliflower-like CeO2: TiO2 Hybrid Nanostructures with Extreme Photocatalytic and Self-Cleaning Properties', Nanoscale, bind 11, nr. 20, s. 9840-9844. https://doi.org/10.1039/C9NR01208G

Cauliflower-like CeO2 : TiO2 Hybrid Nanostructures with Extreme Photocatalytic and Self-Cleaning Properties. / Veziroglu, Salih; Röder, Katharina; Gronenberg, Ole; Vahl, Alexander; Polonsky, Oleksandr; Strunskus, Thomas; Rubahn, Horst-Günter; Kienle, Lorenz; Adam, Jost; Fiutowski, Jacek; Faupel , Franz ; Aktas, Oral Cenk.

I: Nanoscale, Bind 11, Nr. 20, 2019, s. 9840-9844.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Cauliflower-like CeO2

T2 - TiO2 Hybrid Nanostructures with Extreme Photocatalytic and Self-Cleaning Properties

AU - Veziroglu, Salih

AU - Röder, Katharina

AU - Gronenberg, Ole

AU - Vahl, Alexander

AU - Polonsky, Oleksandr

AU - Strunskus, Thomas

AU - Rubahn, Horst-Günter

AU - Kienle, Lorenz

AU - Adam, Jost

AU - Fiutowski, Jacek

AU - Faupel , Franz

AU - Aktas, Oral Cenk

PY - 2019

Y1 - 2019

N2 - In recent years, heterogeneous photocatalysis has gained enormous interest due to increasing concerns about environmental pollution. Here we propose a facile approach to synthesize cauliflower-like CeO 2 -TiO 2 hybrid structures by magnetron reactive sputtering, exhibiting an extremely high photocatalytic activity. While heating and air-quenching of the sputter deposited TiO 2 thin film (first layer) triggered the formation of a nanocrack network, the second heat-treatment led to transformation of the CeO 2 film (second layer) into CeO 2 nanoclusters (NCs). We attribute the resulting high photocatalytic activity to the confined structure of the CeO 2 NCs and the CeO 2 -TiO 2 interface, which allows Ce 3+ /Ce 4+ dynamic shifting. In addition to high photocatalytic activity in an aqueous medium, the prepared CeO 2 -TiO 2 hybrid structures exhibited significant self-cleaning properties in air (non-aqueous).

AB - In recent years, heterogeneous photocatalysis has gained enormous interest due to increasing concerns about environmental pollution. Here we propose a facile approach to synthesize cauliflower-like CeO 2 -TiO 2 hybrid structures by magnetron reactive sputtering, exhibiting an extremely high photocatalytic activity. While heating and air-quenching of the sputter deposited TiO 2 thin film (first layer) triggered the formation of a nanocrack network, the second heat-treatment led to transformation of the CeO 2 film (second layer) into CeO 2 nanoclusters (NCs). We attribute the resulting high photocatalytic activity to the confined structure of the CeO 2 NCs and the CeO 2 -TiO 2 interface, which allows Ce 3+ /Ce 4+ dynamic shifting. In addition to high photocatalytic activity in an aqueous medium, the prepared CeO 2 -TiO 2 hybrid structures exhibited significant self-cleaning properties in air (non-aqueous).

U2 - 10.1039/C9NR01208G

DO - 10.1039/C9NR01208G

M3 - Journal article

VL - 11

SP - 9840

EP - 9844

JO - Nanoscale

JF - Nanoscale

SN - 2040-3364

IS - 20

ER -

Veziroglu S, Röder K, Gronenberg O, Vahl A, Polonsky O, Strunskus T et al. Cauliflower-like CeO2: TiO2 Hybrid Nanostructures with Extreme Photocatalytic and Self-Cleaning Properties. Nanoscale. 2019;11(20):9840-9844. https://doi.org/10.1039/C9NR01208G