Abstract
Carbon-doped titania hollow spheres (THS) with unique hollow three-dimensional network structure were synthesized by a facile method using carbon spheres as template. The resultant samples, such as carbon spheres, carbon spheres coated with titania precursor, and final THS were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), energy dispersive X-ray spectrometer (EDS), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectra (FTIR), Brunauer-Emmett-Teller (BET) and UV-vis absorption spectrum. Based on the results of these characterizations, a reasonable formation mechanism of the hollow three-dimensional network structure was proposed. The photocatalytic activity of as-prepared THS was evaluated by decoloration of methylene blue solution under visible light irradiation. Results indicated that THS possessed higher visible light-induced photocatalytic activity than commercial P25, which could be attributed to its visible light absorption characteristic created by C-doping and the unique hollow three-dimensional network structure.
| Original language | English |
|---|---|
| Pages (from-to) | 226-232 |
| Number of pages | 7 |
| Journal | Chemical Engineering Journal |
| Volume | 195-196 |
| DOIs | |
| State | Published - 1 Jul 2012 |
| Externally published | Yes |
Keywords
- Carbon sphere
- Hollow sphere
- Photocatalysis
- Titania
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