Nanowhiskers of K2Ti6O13 as a promoter of photocatalysis in anatase mesocrystals

Alexey A. Sadovnikov; Alexey V. Garshev; Andrei A. Eliseev; Artemii N. Beltiukov; Evgeny R. Naranov; W. Li; Andrew J. Sutherland; Olga V. Boytsova

doi:10.1016/j.cattod.2020.12.039

Nanowhiskers of K₂Ti₆O₁₃ as a promoter of photocatalysis in anatase mesocrystals

Alexey A. Sadovnikov^*, Alexey V. Garshev, Andrei A. Eliseev, Artemii N. Beltiukov, Evgeny R. Naranov, W. Li, Andrew J. Sutherland, Olga V. Boytsova

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

Here we describe the development of a new mesocrytalline anatase-based photocatalyst with an activity nearly double that of the commercial Evonik Aeroxide® TiO₂ P25 catalyst. An extensive characterization of this new catalytic material with XRD, TEM, SAED, EELS, SEM, RAMAN and XPS shows that its activity is promoted by its hybrid structure comprising mesocrystalline anatase and K₂Ti₆O₁₃ whiskers formed within the TiO₂ mesocrystals. This new and unexpected component is formed in situ within the TiO₂ mesocrystalline framework at a surprisingly low temperature of 500 °C as a result of potassium diffusion from polymer-matrix phase. The growth of whiskers occurs at the 001 TiO₂ planes of mesocrystals and their sizes attain 60 nm in a section and a few μm in length.

Original language	English
Pages (from-to)	133-139
Number of pages	7
Journal	Catalysis Today
Volume	378
Early online date	12 Jan 2021
DOIs	https://doi.org/10.1016/j.cattod.2020.12.039
Publication status	Published - 15 Oct 2021

Bibliographical note

© 2021, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

Funding Information:
The work was financially supported by the Russian Science Foundation (project No18-73-10212). This study was performed using the equipment of the JRC PMR IGIC RAS and of the Shared Use Centre “Centre of Physical and Physicochemical Methods of Analysis and Study of the Properties and Surface Characteristics of Nanostructures, Materials, and Products” UdmFRC UB RAS". X-ray diffraction analysis and N 2 adsorption of materials were partially carried out with support the TIPS RAS state assignment.

Keywords

Composites
Hybrid photocatalyst
KTiO whiskers
TiO mesocrystals

Access to Document

10.1016/j.cattod.2020.12.039

Nanowhiskers
© 2021, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Accepted author manuscript, 682 KBLicence: CC BY-NC-ND 3.0

Cite this

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title = "Nanowhiskers of K2Ti6O13 as a promoter of photocatalysis in anatase mesocrystals",

abstract = "Here we describe the development of a new mesocrytalline anatase-based photocatalyst with an activity nearly double that of the commercial Evonik Aeroxide{\textregistered} TiO2 P25 catalyst. An extensive characterization of this new catalytic material with XRD, TEM, SAED, EELS, SEM, RAMAN and XPS shows that its activity is promoted by its hybrid structure comprising mesocrystalline anatase and K2Ti6O13 whiskers formed within the TiO2 mesocrystals. This new and unexpected component is formed in situ within the TiO2 mesocrystalline framework at a surprisingly low temperature of 500 °C as a result of potassium diffusion from polymer-matrix phase. The growth of whiskers occurs at the 001 TiO2 planes of mesocrystals and their sizes attain 60 nm in a section and a few μm in length.",

keywords = "Composites, Hybrid photocatalyst, KTiO whiskers, TiO mesocrystals",

author = "Sadovnikov, {Alexey A.} and Garshev, {Alexey V.} and Eliseev, {Andrei A.} and Beltiukov, {Artemii N.} and Naranov, {Evgeny R.} and W. Li and Sutherland, {Andrew J.} and Boytsova, {Olga V.}",

note = "{\textcopyright} 2021, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ Funding Information: The work was financially supported by the Russian Science Foundation (project No18-73-10212). This study was performed using the equipment of the JRC PMR IGIC RAS and of the Shared Use Centre “Centre of Physical and Physicochemical Methods of Analysis and Study of the Properties and Surface Characteristics of Nanostructures, Materials, and Products” UdmFRC UB RAS{"}. X-ray diffraction analysis and N 2 adsorption of materials were partially carried out with support the TIPS RAS state assignment. ",

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AU - Sadovnikov, Alexey A.

AU - Garshev, Alexey V.

AU - Eliseev, Andrei A.

AU - Beltiukov, Artemii N.

AU - Naranov, Evgeny R.

AU - Li, W.

AU - Sutherland, Andrew J.

AU - Boytsova, Olga V.

N1 - © 2021, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ Funding Information: The work was financially supported by the Russian Science Foundation (project No18-73-10212). This study was performed using the equipment of the JRC PMR IGIC RAS and of the Shared Use Centre “Centre of Physical and Physicochemical Methods of Analysis and Study of the Properties and Surface Characteristics of Nanostructures, Materials, and Products” UdmFRC UB RAS". X-ray diffraction analysis and N 2 adsorption of materials were partially carried out with support the TIPS RAS state assignment.

PY - 2021/10/15

Y1 - 2021/10/15

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AB - Here we describe the development of a new mesocrytalline anatase-based photocatalyst with an activity nearly double that of the commercial Evonik Aeroxide® TiO2 P25 catalyst. An extensive characterization of this new catalytic material with XRD, TEM, SAED, EELS, SEM, RAMAN and XPS shows that its activity is promoted by its hybrid structure comprising mesocrystalline anatase and K2Ti6O13 whiskers formed within the TiO2 mesocrystals. This new and unexpected component is formed in situ within the TiO2 mesocrystalline framework at a surprisingly low temperature of 500 °C as a result of potassium diffusion from polymer-matrix phase. The growth of whiskers occurs at the 001 TiO2 planes of mesocrystals and their sizes attain 60 nm in a section and a few μm in length.

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