- 作者: 李仰川,鄭淑芬
- 作者服務機構: Department of Chemistry, National Taiwan University, Taipei 106, Taiwan, R.O.C.
- 中文摘要: Nano TiO2 particles encapsulated in mesoporous SiO2 materials (abbreviated as TiO2/MS) were prepared by incorporating the nano-sized TiO2 particles in the pore-directing micelles during the cooperative assembly of silica precursor and surfactant. The materials were characterized with X-ray powder diffraction (XRD), transmission and scanning electron microcopies (TEM and SEM), N2 sorption, ICP-MS and UV-Vis spectroscopy. XRD patterns showed that titania was in the anatase phase. The results of TEM and N2 sorption studies confirmed the deposition of nano-sized particles inside the mesopores of silica material without destroying their integrity. UV-Vis spectra showed blue shift of the absorption edge for TiO2/ MS relative to bulk anatase. When used as photocatalysts, TiO2/MS showed similar activity as anatase TiO2 in photo-degradation of phenol. However, lower activity than anatase TiO2 was observed in photo-degradation of lipase, implying that most of the nano-sized TiO2 were encapsulated inside the mesopores of silica.
- 英文摘要: --
- 中文關鍵字: Photocatalyst; Photodegradation; Encapsulated; Mesoporous SiO2; Reverse micelle; Microemulsion; Nano TiO2 particles.
- 英文關鍵字: --