화학공학소재연구정보센터
Materials Science Forum, Vol.486-487, 93-96, 2005
Preparation of nano-sized TiO(2) photocatalysts by a multi-gelation method and their application to the degradation of 2-propanol diluted in water
TiO(2) photocatalysts prepared by a novel multi-gelation method showed good photocatalytic activity for the degradation of 2-propanol diluted in water by the control of parameters such as particle size, surface area, crystallinity, pore-volume, pore-diameter as well as anatase and rutile phase composition by changing the number of pH swings during preparation. In particular, with this method the phase transition from anatase to rutile at higher pH swing times can be controlled and high purity and uniformity of the TiO(2) particles which leads to higher photocatalytic activity of the particles can be achieved. From our experimental results, it has been observed that TiO(2) catalysts prepared by this unique multi-gelation method, i.e., adopting variations in the pH swing, significantly shows higher photocatalytic activity for the degradation of 2-propanol diluted in water. It can be considered a viable alternative over existing commercial methods for the preparation of photofunctional catalysts.