Photocatalytic Activity of Multicompound TiO2/SiO2 Nanoparticles

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

doi:10.3390/inorganics9040021

Inorganics (Mar 2021)

Photocatalytic Activity of Multicompound TiO2/SiO2 Nanoparticles

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

Affiliations

Filipp Temerov: Department of Chemistry, University of Eastern Finland, P.O. Box 111, FI-80101 Joensuu, Finland
Janne Haapanen: Aerosol Physics Laboratory, Department of Physics, Tampere University, P.O. Box 692, FI-33101 Tampere, Finland
Jyrki M. Mäkelä: Aerosol Physics Laboratory, Department of Physics, Tampere University, P.O. Box 692, FI-33101 Tampere, Finland
Jarkko J. Saarinen: Department of Chemistry, University of Eastern Finland, P.O. Box 111, FI-80101 Joensuu, Finland

DOI: https://doi.org/10.3390/inorganics9040021
Journal volume & issue: Vol. 9, no. 4
p. 21

Abstract

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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 morphology. 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.

Published in Inorganics

ISSN: 2304-6740 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry: Inorganic chemistry
Website: http://www.mdpi.com/journal/Inorganics

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