Synthesis and Photocatalytic Activity of TiO_2 Nanoparticles Loaded on the Fluorine-modified Hydrophobic Mesoporous Silica

摘要

The fluorine-modified mesoporous silica HMS(F20) was synthesized by using the mixture of TEFS(SiF(OC_2H_5)_3) and TEOS(Si(OC_2H_5)_4) as the silica source. The specific surface and pore size distribution were characterized by N_2 adsorption and the hydrophilic-hydrophobic property was measured by water adsorption. The photocatalytic activities of TiO_2 nanoparticles loaded on HMF(F20) and HMS were investigated for the degradation of iso-butanol diluted in water. The results show that the fluorine-modified mesoporous silica HMS(F20) has higher hydrophobic property than HMS and the TiO_2/HMS(F20) exhibits the higher photocatalytic activity than TiO_2/HMS. The hydrophobic mesopores benefit the condensation of hydrophobic organic compounds diluted in water, which results in higher photocatalytic degradation efficiency.