Abstract: TiO₂ and TiO₂-SiO₂ photocatalysts were prepared by sol-gel and supercritical CO₂ fluid
drying method and characterized by X-ray diffraction (XRD), transmission electron
microscope (TEM), etc. Their catalytic properties were tested through the photocatalytic
degradation of phenol and aniline in wastewater. The results show that the developed
fluidized photocatalytic reactor (FPR) and TiO₂ catalyst had better performance in
degrading pollutants as compared with slurry photocatalytic reactor (SPR) and commercial
TiO₂ catalyst. The composition and crystal form of TiO₂-SiO₂ composite oxide had obvious
influence on catalytic effect and TiO₂-SiO₂ photocatalysts showed better catalytic activity
and stability.

Key words: titanium dioxide, composite oxide, photocatalytic activity, degradation

摘要：

TiO₂ and TiO₂-SiO₂ photocatalysts were prepared by sol-gel and supercritical CO₂ fluid
drying method and characterized by X-ray diffraction (XRD), transmission electron
microscope (TEM), etc. Their catalytic properties were tested through the photocatalytic
degradation of phenol and aniline in wastewater. The results show that the developed
fluidized photocatalytic reactor (FPR) and TiO₂ catalyst had better performance in
degrading pollutants as compared with slurry photocatalytic reactor (SPR) and commercial
TiO₂ catalyst. The composition and crystal form of TiO₂-SiO₂ composite oxide had obvious
influence on catalytic effect and TiO₂-SiO₂ photocatalysts showed better catalytic activity
and stability.

关键词: titanium dioxide;composite oxide;photocatalytic activity;degradation