Abstract
titanium dioxide (C–TiO2) suspension for the development of a photocatalytic coating for indoor air improvement. The dosage effect of the applied coating and the effect of the ultraviolet pre-treatment, as an activation technique, on the photocatalytic efficiency were studied. A plug-flow experimental setup was employed for the photocatalytic efficiency assessment under realistic indoor air environment.
The results showed that the nano-silica addition and the UV pre-treatment enhanced the photocatalytic efficiency of the developed coatings. The nano-silica modification was more beneficial when the coatings were applied in higher photocatalyst dosages (0.84 mg·cm−2 or 1.27 mg·cm−2 of C–TiO2) especially during the UV pre-treatment. The silica-modified samples tested under visible light and reduced flow rate of 1.5 L·min−1 degraded up to 65% and 78% of NO (up to 43% and 60% of NOx) under initial concentration of 0.5 and 0.1 ppm, respectively. Moreover, the reaction rate and reactive uptake coefficient of the developed coatings were computed
The results showed that the nano-silica addition and the UV pre-treatment enhanced the photocatalytic efficiency of the developed coatings. The nano-silica modification was more beneficial when the coatings were applied in higher photocatalyst dosages (0.84 mg·cm−2 or 1.27 mg·cm−2 of C–TiO2) especially during the UV pre-treatment. The silica-modified samples tested under visible light and reduced flow rate of 1.5 L·min−1 degraded up to 65% and 78% of NO (up to 43% and 60% of NOx) under initial concentration of 0.5 and 0.1 ppm, respectively. Moreover, the reaction rate and reactive uptake coefficient of the developed coatings were computed
| Original language | English |
|---|---|
| Pages (from-to) | 942-952 |
| Number of pages | 11 |
| Journal | Chemical Engineering Journal |
| Volume | 306 |
| DOIs | |
| Publication status | Published - 25 Jul 2016 |