Abstract
Titanium dioxide (TiO2) has been extensively investigated for the photocatalytic purification of air and water. In this article, we have focused on the mechanisms of the one-electron redox reactions of organic compounds during the TiO2 photocatalytic reactions and on the development of TiO2-based materials. It was clearly demonstrated that the adsorption dynamics of substrates and intermediates, the electronic interaction between TiO2 and adsorbates, and the band structure and morphology of TiO2 nanomaterials are crucial factors for establishing efficient photocatalytic reaction systems. The TiO2-based hybrid nanoparticles with various functional materials, such as polyoxometalates (POMs) and cyclodextrins (CDs), have been fabricated on the basis of the mechanistic aspects. New experimental methods, such as two-color two-laser flash photolysis and single-molecule fluorescence techniques, for the investigation of the TiO2 photocatalytic reactions have been demonstrated.
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