摘要：The wool-ball-like TiO 2 microspheres on carbon fabric (TiO 2 -CF) and FTO substrates (TiO 2 -FTO) have been synthesized by a facile hydrothermal method in alkali environment, using commercial TiO 2 (P25) as precursors. The XRD results indicate that the as-prepared TiO 2 have good crystallinity. And the SEM images show that the wool-ball-like TiO 2 microspheres with a diameter of 2-3 μm are composed of TiO 2 nanowires, which have a diameter of ~50 nm. The photocatalytic behavior of the wool-ball-like TiO 2 microspheres, TiO 2 -CF and TiO 2 -FTO under ultraviolet light was investigated by a pseudo first-order kinetic model, using methyl orange (MO) as pollutant. The wool-ball-like TiO 2 microspheres obtained a degradation rate constant (K ap ) of 6.91×10 -3 min -1 . The K ap values of TiO 2 -FTO and TiO 2 -CF reach 13.97×10 -3 min -1 and 11.80×10 -3 min -1 , which are 2.0 and 1.7 times higher than that of pristine wool-ball-like TiO 2 microspheres due to the “sum effect” between TiO 2 and substrates. This study offers a facile hydrothermal method to prepare wool-ball-like TiO 2 microspheres on CF and FTO substrates, which will improve the recyclability of phtocatalysts and can be extended to other fields.
