期刊
INORGANICS
卷 9, 期 4, 页码 -出版社
MDPI
DOI: 10.3390/inorganics9040021
关键词
photocatalysis; TiO2; SiO2; nanoparticles; liquid flame spray (LFS)
资金
- Finnish Cultural Foundation
- Faculty of Science and Forestry at the University of Eastern Finland [579/2017]
- Academy of Finland Flagship for Photonics Research and Innovation (PREIN) [320166]
The addition of SiO2 significantly suppressed the photocatalytic activity of multicompound TiO2/SiO2 nanoparticles, possibly due to the formation of a passivating SiO2 layer on the surface of TiO2 nanostructures.
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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据