Abstract
TiO2 photocatalyst beads were synthesised using the circulating fluidised bed-chemical vapour deposition (CFB-CVD) method. Their photocatalytic activity was compared with the TiO2 photocatalyst balls synthesised using the conventional CVD (C-CVD) method. The TiO2 film synthesized by CFB-CVD showed (110) oriented anatase crystal structure. Compared to the film synthesised by C-CVD, the CFB-CVD synthesised film had much less dense crystal structure owing to TiO2 powders precipitated during the film growth. When the CFB-CVD synthesised TiO2 beads were used in the photocatalytic decomposition of RhB in a fluidised bed reactor, the decomposition rate increased with increasing UV intensity and circulating flowrate and with decreasing initial RhB concentration. One important shortcoming of the TiO2 photocatalyst beads synthesised by CFB-CVD turned out to be that the photocatalytic activity was decreased significantly by repeated reuse, calling for further investigation to improve the durability.
Original language | English |
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Pages (from-to) | 134-139 |
Number of pages | 6 |
Journal | Surface Engineering |
Volume | 31 |
Issue number | 2 |
DOIs | |
State | Published - 1 Feb 2015 |
Keywords
- Chemical vapour deposition
- Circulating fluidised bed
- Glass bead
- Photocatalytic activity
- Tio film