Photocatalytic activity of dispersed TiO 2 particles deposited on glass fibers

Abstract

Anatase TiO 2 particles were uniformly and dispersedly deposited on the surface of glass fibers by a liquid phase deposition (LPD) method from a TiF 4 aqueous solution upon addition of H 3BO 3 at 60 °C and then calcined at 60, 300 and 500 °C. The photocatalytic activity of the samples was evaluated by the photocatalytic oxidation of nitrogen monoxide (NO) in the gaseous phase. It was found that calcination temperatures obviously influenced the surface morphology and photocatalytic activity of the TiO 2 particles deposited on the glass fibers. At 300 °C, the TiO 2 samples exhibited the highest photocatalytic activity for the photocatalytic oxidation of NO and for the further conversion of NO 2 (from NO 2 to HNO 3) due to the enhancement of crystallization of anatase TiO 2 particles. At 500 °C, the photocatalytic activity of the sample decreased significantly due to the dropping of many TiO 2 particles from the glass fibers. Compared with the TiO 2 film photocatalyst, the TiO 2 particles deposited on the glass fibers exhibited a lower deactivation rate.