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

doi:10.1039/C9NR01208G

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

Christian-Albrechts-University of Kiel

Research output: Contribution to journal › Journal article › Research › peer-review

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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).

Original language	English
Journal	Nanoscale
Volume	11
Issue number	20
Pages (from-to)	9840-9844
Number of pages	6
ISSN	2040-3364
DOIs	https://doi.org/10.1039/C9NR01208G
Publication status	Published - 2019

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10.1039/C9NR01208G

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@article{5687ec05ab374ed186645595b7d30c18,

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}",

year = "2019",

doi = "10.1039/C9NR01208G",

language = "English",

volume = "11",

pages = "9840--9844",

journal = "Nanoscale",

issn = "2040-3364",

publisher = "Royal Society of Chemistry",

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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

SN - 2040-3364

VL - 11

SP - 9840

EP - 9844

JO - Nanoscale

JF - Nanoscale

IS - 20

ER -

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

Abstract

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