Design of Efficient TiO₂/SiC Photocatalysts from TiC-SiC Nano Particles for Degradation of Organic Pollutants Diluted in Water

Abstract

TiO2/SiC was prepared by oxidizing the TiC-SiC precursor obtained by carbothermic reduction process of TiO2-SiO2 binary oxide. An XRD analysis indicated the formation of the mixture of anatase and rutile phases of TiO2 crystalline after the oxidation of TiC-SiC sample. TiO2/SiC photocatalyst exhibited a higher photocatalytic reactivity than TiO2-SiO2 binary oxide prepared by the conventional sol-gel method. These results indicate the advantages of SiC nano powders as catalyst support of the TiO2 photocatalysts, and TiO2/SiC photocatalyst is effective for the degradation of organic compounds diluted in water.

Photocatalytic Properties of Nitrogen-Doped Bi12TiO20Synthesized by Urea Addition Sol-Gel Method

“…However, wide bandgap semiconductor photocatalysts, such as TiO 2 , can only absorb UV light, which only take 4% of the whole solar spectra owing to the wide bandgap. In order to expand the absorption spectra region of TiO 2 , doping with nonmetallic atoms, such as nitrogen, fluorine and sulfur has been developed [5][6][7][8][9][10][11][12][13][14][15][16][17][18]. The conventional doping processes reported were commonly by the annealing of prepared TiO 2 materials in NH 3 or other dopant atmospheres [5][6][7][8].…”