Photodegradation of Orange II by mesoporous TiO ₂

Mesoporous TiO ₂ microspheres were prepared by a hydrothermal reaction and are characterized in this paper. Decoloration and mineralization during photodegradation of Orange II by mesoporous TiO ₂ at different pH values, formation of sulfate, relative luminosity to luminous bacteria and recycling experiments of the catalyst were studied. The FTIR results further suggested that the novel mesoporous TiO ₂ can not only decolor and mineralize dyes completely but also can be effectively reused several times. On the basis of the research, mesoporous TiO ₂ would be a promising photocatalyst for practical use.