Photocatalytic Activity of Multicompound TiO2/SiO2 Nanoparticles

Filipp Temerov; Janne Haapanen; Jyrki M. Mäkelä; Jarkko J. Saarinen

doi:10.3390/inorganics9040021

Photocatalytic Activity of Multicompound TiO2/SiO2 Nanoparticles

Filipp Temerov, Janne Haapanen, Jyrki M. Mäkelä, Jarkko J. Saarinen

Physics

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Abstract

Multicompound TiO₂ /SiO₂ nanoparticles with a diameter of 50–70 nm were generated using a liquid flame spray (LFS) nanoparticle deposition in a single flame. Here, we study the photocatalytic activity of deposited multicompound nanoparticles in gas-phase via oxidation of acetylene into carbon dioxide that gives new insight about the multicompound nanoparticle mor-phology. A small addition of SiO₂ content of 0.5%, 1.0% and 3.0% significantly suppressed the photocatalytic activity by 33%, 44% and 70%, respectively, whereas 5.0% SiO₂ addition completely removed the activity. This may be due to a formation of a thin passivating SiO₂ layer on top of the of the TiO₂ nanostructures during the LFS nanoparticle deposition. Surface wetting results support this hypothesis with a significant increase in water contact angle as the SiO₂ content is increased.

Original language	English
Article number	21
Journal	Inorganics
Volume	9
Issue number	4
DOIs	https://doi.org/10.3390/inorganics9040021
Publication status	Published - 2021
Publication type	A1 Journal article-refereed

Keywords

Liquid flame spray (LFS)
Nanoparticles
Photocatalysis
SiO
TiO

Publication forum classification

Publication forum level 1

ASJC Scopus subject areas

Inorganic Chemistry

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10.3390/inorganics9040021Licence: CC BY

Photocatalytic Activity of Multicompound 2021
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Final published version, 3.15 MBLicence: CC BY

http://urn.fi/URN:NBN:fi:tuni-202105064537Licence: CC BY

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title = "Photocatalytic Activity of Multicompound TiO2/SiO2 Nanoparticles",

abstract = "Multicompound TiO2 /SiO2 nanoparticles with a diameter of 50–70 nm were generated using a liquid flame spray (LFS) nanoparticle deposition in a single flame. Here, we study the photocatalytic activity of deposited multicompound nanoparticles in gas-phase via oxidation of acetylene into carbon dioxide that gives new insight about the multicompound nanoparticle mor-phology. A small addition of SiO2 content of 0.5%, 1.0% and 3.0% significantly suppressed the photocatalytic activity by 33%, 44% and 70%, respectively, whereas 5.0% SiO2 addition completely removed the activity. This may be due to a formation of a thin passivating SiO2 layer on top of the of the TiO2 nanostructures during the LFS nanoparticle deposition. Surface wetting results support this hypothesis with a significant increase in water contact angle as the SiO2 content is increased.",

keywords = "Liquid flame spray (LFS), Nanoparticles, Photocatalysis, SiO, TiO",

author = "Filipp Temerov and Janne Haapanen and M{\"a}kel{\"a}, {Jyrki M.} and Saarinen, {Jarkko J.}",

note = "Funding Information: Funding: This research was funded by Finnish Cultural Foundation for a research grant to F.T. J.J.S. acknowledges the Faculty of Science and Forestry at the University of Eastern Finland for the financial support (grant no. 579/2017) and the Academy of Finland Flagship for Photonics Research and Innovation (PREIN, decision no. 320166). Publisher Copyright: {\textcopyright} 2021 by the authors. Licensee MDPI, Basel, Switzerland.",

year = "2021",

doi = "10.3390/inorganics9040021",

language = "English",

volume = "9",

number = "4",

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TY - JOUR

T1 - Photocatalytic Activity of Multicompound TiO2/SiO2 Nanoparticles

AU - Temerov, Filipp

AU - Haapanen, Janne

AU - Mäkelä, Jyrki M.

AU - Saarinen, Jarkko J.

N1 - Funding Information: Funding: This research was funded by Finnish Cultural Foundation for a research grant to F.T. J.J.S. acknowledges the Faculty of Science and Forestry at the University of Eastern Finland for the financial support (grant no. 579/2017) and the Academy of Finland Flagship for Photonics Research and Innovation (PREIN, decision no. 320166). Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

PY - 2021

Y1 - 2021

N2 - Multicompound TiO2 /SiO2 nanoparticles with a diameter of 50–70 nm were generated using a liquid flame spray (LFS) nanoparticle deposition in a single flame. Here, we study the photocatalytic activity of deposited multicompound nanoparticles in gas-phase via oxidation of acetylene into carbon dioxide that gives new insight about the multicompound nanoparticle mor-phology. A small addition of SiO2 content of 0.5%, 1.0% and 3.0% significantly suppressed the photocatalytic activity by 33%, 44% and 70%, respectively, whereas 5.0% SiO2 addition completely removed the activity. This may be due to a formation of a thin passivating SiO2 layer on top of the of the TiO2 nanostructures during the LFS nanoparticle deposition. Surface wetting results support this hypothesis with a significant increase in water contact angle as the SiO2 content is increased.

AB - Multicompound TiO2 /SiO2 nanoparticles with a diameter of 50–70 nm were generated using a liquid flame spray (LFS) nanoparticle deposition in a single flame. Here, we study the photocatalytic activity of deposited multicompound nanoparticles in gas-phase via oxidation of acetylene into carbon dioxide that gives new insight about the multicompound nanoparticle mor-phology. A small addition of SiO2 content of 0.5%, 1.0% and 3.0% significantly suppressed the photocatalytic activity by 33%, 44% and 70%, respectively, whereas 5.0% SiO2 addition completely removed the activity. This may be due to a formation of a thin passivating SiO2 layer on top of the of the TiO2 nanostructures during the LFS nanoparticle deposition. Surface wetting results support this hypothesis with a significant increase in water contact angle as the SiO2 content is increased.

KW - Liquid flame spray (LFS)

KW - Nanoparticles

KW - Photocatalysis

KW - SiO

KW - TiO

U2 - 10.3390/inorganics9040021

DO - 10.3390/inorganics9040021

M3 - Article

AN - SCOPUS:85103811858

VL - 9

IS - 4

M1 - 21

ER -

Photocatalytic Activity of Multicompound TiO2/SiO2 Nanoparticles

Abstract

Keywords

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