Photocatalytic Activity of Multicompound TiO2/SiO2 Nanoparticles

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

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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 languageEnglish
Article number21
JournalInorganics
Volume9
Issue number4
DOIs
Publication statusPublished - 2021
Publication typeA1 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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