Abstract
Reduced graphene oxide-TiO2 (RGO-TiO2) nanocomposites have been successfully synthesized through a facile hydrothermal reaction with minor modification using graphene oxide (GO) and commercial P25 as starting materials in an ethanol-water solvent, followed by calcining temperature at 400 °C for 2 h in Ar. These nanocomposites prepared with different ratios of graphene oxide (GO) were characterized by BET surface area, X-ray diffraction (XRD), Raman spectroscopy, UV-vis diffuse reflectance spectroscopy (UV-vis DRS), Fourier transform infrared (FT-IR) spectroscopy, X-ray photoelectron spectroscopy (XPS), Transmission Electron Microscopy (TEM) and ultraviolet-visible (UV-vis) absorption spectroscopy. The RGO-TiO2 nanocomposites exhibited much higher photocatalytic activity than bare P25 for the degradation of rhodamine B (Rh.B) in an aqueous solution. The improved photocatalytic activities may be attributed to increased adsorbability for Rh.B molecular, light absorption levels in visible region and charge transfer rate in the presence of a two-dimensional graphene network.
| Original language | English |
|---|---|
| Pages (from-to) | 101-107 |
| Number of pages | 7 |
| Journal | Journal of Molecular Catalysis A: Chemical |
| Volume | 345 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - 5 Jul 2011 |
Keywords
- Charge transfer
- Graphene oxide
- Hydrothermal reaction
- Photocatalytic activity
- Reduced graphene oxide-TiO nanocomposite
- Rhodamine B