Abstract
TiO2 oxide was deposited on a microstructured α-Al2O3 ceramic hollow fiber substrate by a simple one-step solution-immersion process with tetraethyl orthosilicate (TEOS) as a binder. The effects of the starting coating solution's composition on the photocatalytic properties of TiO2 powders deposited on a substrate was determined by using TiO2-supported Al2O3 ceramic hollow fiber substrates fabricated from coating solutions with different compositions and examining the substrates' effect on the methylene blue (MetB) degradation reaction under ultraviolet light. A strong correlation was observed between the initial coating solution compositions and the final photocatalytic characteristics of the TiO2-supported Al2O3 ceramic hollow fiber substrates. Under optimal conditions, the MetB removal efficiency reached about 91% in a few minutes. To the best of our knowledge, this is the highest and most rapidly attained MetB removal efficiency reported for TiO2-supported Al2O3 ceramic hollow fiber substrates. Furthermore, apart from attaining an extremely high photocatalytic activity within minutes, the fabricated TiO2-supported Al2O3 ceramic hollow fiber substrates exhibited high photocatalytic stability even after several cycles.
Original language | English |
---|---|
Pages (from-to) | 7764-7775 |
Number of pages | 12 |
Journal | Ceramics International |
Volume | 47 |
Issue number | 6 |
DOIs | |
State | Published - 15 Mar 2021 |
Keywords
- (B) Surface
- (D) Al2O3
- (D) TiO
- A) Powders: chemical preparation
- Photocatalysis