Photocatalytic Activity of Multicompound TiO2/SiO2 Nanoparticles
Temerov, Filipp; Haapanen, Janne; Mäkelä, Jyrki M.; Saarinen, Jarkko J. (2021)
Temerov, Filipp
Haapanen, Janne
Mäkelä, Jyrki M.
Saarinen, Jarkko J.
2021
21
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:tuni-202105064537
https://urn.fi/URN:NBN:fi:tuni-202105064537
Kuvaus
Peer reviewed
Tiivistelmä
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.
Kokoelmat
- TUNICRIS-julkaisut [16951]