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

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
Journal	Catalysis today
DOIs	https://doi.org/10.1016/j.cattod.2020.12.039
Publication status	Published - 12 Jan 2021
Externally published	Yes

Keywords / Materials (for Non-textual outputs)

Composites
Hybrid photocatalyst
KTiO whiskers
TiO mesocrystals

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10.1016/j.cattod.2020.12.039

NanowhiskersAccepted author manuscript, 1.11 MB

https://www.sciencedirect.com/science/article/pii/S0920586121000225?via%3Dihub

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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.}",

year = "2021",

month = jan,

day = "12",

doi = "10.1016/j.cattod.2020.12.039",

language = "English",

journal = "Catalysis today",

issn = "0920-5861",

publisher = "Elsevier",

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T1 - Nanowhiskers of K2Ti6O13 as a promoter of photocatalysis in anatase mesocrystals

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.

PY - 2021/1/12

Y1 - 2021/1/12

N2 - 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.

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.

KW - Composites

KW - Hybrid photocatalyst

KW - KTiO whiskers

KW - TiO mesocrystals

UR - https://doi.org/10.1016/j.cattod.2020.12.039

UR - http://www.scopus.com/inward/record.url?scp=85099966143&partnerID=8YFLogxK

U2 - 10.1016/j.cattod.2020.12.039

DO - 10.1016/j.cattod.2020.12.039

M3 - Article

SN - 0920-5861

JO - Catalysis today

JF - Catalysis today

ER -

Nanowhiskers of K2Ti6O13 as a promoter of photocatalysis in anatase mesocrystals

Abstract

Keywords / Materials (for Non-textual outputs)

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