| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 66954 | Journal of Molecular Catalysis A: Chemical | 2009 | 7 Pages |
Visible-light responsive carbon modified TiO2 was synthesized through simple precipitation of tetrabutyl titanate in proper amount of water. The as-synthesized catalyst was characterized by elemental analysis, N2 adsorption–desorption analysis, X-ray powder diffraction (XRD), Raman spectroscopy, transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV–vis diffuse reflectance spectra (DRS) and nuclear magnetic resonance (NMR). The results indicate that carbon modifies TiO2 in two ways: doping as interstitial carbon in the crystal lattice and coating as graphite-like carbon on the surface. It is found that the interstitial carbon could narrow the band gap, and the graphite-like carbon could serve as sensitizer. The sensitization effect of graphite-like carbon is found to contribute greatly to the excellent photocatalytic performance of carbon modified TiO2. It has been found that 95.6% of MO was decolorized within 120 min and 92.7% of Cr(VI) was reduced within 90 min in the presence of phenol. The formation mechanism of the carbon modified TiO2 has been discussed.
Graphical abstractA novel and simple method was used to synthesize visible-light responsive carbon modified TiO2, which possesses excellent stability and high photocatalytic performance. Carbon elements in the sample calcined at 350 °C simultaneously present as interstitial carbon in the crystal lattice and graphite-like carbon on the surface. And graphite-like carbon contributes greatly to the high photocatalytic performance.Figure optionsDownload full-size imageDownload as PowerPoint slide
