Effect of Fluoride on the Photocatalytic Activity of Hollow TiO2 Microspheres prepared by Fluoride-Mediated Self- Transformation

摘要

Photocatalytic activity of TiO2 is known to be enhanced by surface fluorination due to the enhanced production of free -OH radicals in solution. Recently, hollow TiO2 microspheres with enhanced photocatalytic activity was developed through fluoride-mediated self-transformation, in which the high photocatalytic activity in degradation of acetone was attributed to the fluoride-induced enhanced crystallization of TiO2 without taking into account the effect of surface fluorination. This paper aims to re-evaluate the effects of fluoride-induced crystallization and surface fluorination on the photocatalytic activity of hollow TiO2 microspheres prepared by fluoride-induced self-transformation. Degradation of Brilliant Red X3B (X3B), an organic dye, was performed under different conditions to evaluate photocatalytic activity.