Preparation of TiO(2) Nanotubes Loaded on Polyurethane Membrane and Research on Their Photocatalytic Properties

To solve the problem of separation and recovery of photocatalyst in water, the modification of TiO(2) was studied as well as its immobilization and photocatalytic properties. To improve surface properties, TiO(2) nanotubes were synthesized by a hydrothermal method and silylated by silane coupling agents to introduce a certain functional group. Supported on polyurethane (PU) membrane, TiO(2) nanotubes were prepared to produce immobilized PU/TiO(2). Catalysts were characterized and identified by means of Fourier-transform infrared spectroscopy (FTIR), attenuated total reflectance Fourier-transform infrared spectroscopy (ATR-FTIR), and scanning electron microscopy (SEM). Results showed that silylated TiO(2) nanotubes were well grafted on the surface of the activated PU membrane. With a 300 W high pressure mercury lamp as light source, the photocatalytic activity and stability of immobilized PU/TiO(2) were investigated with degrading methyl orange. It was showed that the target is degraded by immobilized PU/TiO(2) with high activation and the catalytic performance is stable for a long time if catalyst is washed with ethanol.