Photocatalytic Activity of Multicompound TiO2/SiO2 Nanoparticles

被引：7

作者：

Temerov, Filipp ^{[1
]}

Haapanen, Janne ^{[2
]}

Makela, Jyrki M. ^{[2
]}

Saarinen, Jarkko J. ^{[1
]}

机构：

[1] Univ Eastern Finland, Dept Chem, POB 111, FI-80101 Joensuu, Finland

[2] Tampere Univ, Dept Phys, Aerosol Phys Lab, POB 692, FI-33101 Tampere, Finland

来源：

INORGANICS | 2021年 / 9卷 / 04期

基金：

芬兰科学院;

关键词：

photocatalysis; TiO2; SiO2; nanoparticles; liquid flame spray (LFS);

D O I：

10.3390/inorganics9040021

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

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.

引用

页数：12

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