Fabrication of Hydrophobic Zeolites Using Triethoxyfluorosilane and their Application for Photocatalytic Degradation of Acetaldehyde

摘要

Hydrophobically modified zeolites were prepared using alkoxide reagent containing fluorine, triethoxyfluorosilane (TEFS). These zeolites have still maintained mesoporous structure and large surface area and showed more hydrophobic property compared with unmodified zeolite. Moreover surface modified zeolite prepared thus was applied as a support of TiO2 photocatalyst for efficient adsorption and photocatalytic degradation of acetaldehyde diluted in air. With an increase in the grafted amount of TEFS reagent, the TiO2 photocatalyst deposited on the modified zeolite showed greater photocatalytic activities for the degradation of acetaldehyde compared with that on unmodified zeolite due to its hydrophobic property.