TiO2-Impregnated Porous Silica Tube and Its Application for Compact Air- and Water-Purification Units
AbstractA simple, convenient, reusable, and inexpensive air- and water-purification unit including a one-end sealed porous amorphous-silica (a-silica) tube coated with TiO2 photocatalyst layers has been developed. The porous a-silica layers were formed through outside vapor deposition (OVD). TiO2 photocatalyst layers were formed through impregnation and calcination onto a-silica layers. The resulting porous TiO2-impregnated a-silica tubes were evaluated for air-purification capacity using an acetaldehyde gas decomposition test. The tube (8.5 mm e.d. × 150 mm) demonstrated a 93% removal rate for high concentrations (ca. 300 ppm) of acetaldehyde gas at a single-pass condition with a 250 mL/min flow rate under UV irradiation. The tube also demonstrated a water purification capacity at a rate 2.0 times higher than a-silica tube without TiO2 impregnation. Therefore, the tubes have a great potential for developing compact and in-line VOC removal and water-purification units. View Full-Text
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Ochiai, T.; Tago, S.; Hayashi, M.; Tawarayama, H.; Hosoya, T.; Fujishima, A. TiO2-Impregnated Porous Silica Tube and Its Application for Compact Air- and Water-Purification Units. Catalysts 2015, 5, 1498-1506.
Ochiai T, Tago S, Hayashi M, Tawarayama H, Hosoya T, Fujishima A. TiO2-Impregnated Porous Silica Tube and Its Application for Compact Air- and Water-Purification Units. Catalysts. 2015; 5(3):1498-1506.Chicago/Turabian Style
Ochiai, Tsuyoshi; Tago, Shoko; Hayashi, Mio; Tawarayama, Hiromasa; Hosoya, Toshifumi; Fujishima, Akira. 2015. "TiO2-Impregnated Porous Silica Tube and Its Application for Compact Air- and Water-Purification Units." Catalysts 5, no. 3: 1498-1506.