Abstract
Mesostructured Co 3O 4-CeO 2 composite was found to be an effective catalytic material for the complete oxidation of benzene. The Co 3O 4-CeO 2 catalysts with different Co/Ce ratios (mol/mol) were prepared via the nanocasting method and the mesostructure was replicated from two-dimensional (2D) hexagonal SBA-15 and three-dimensional (3D) cubic KIT-6 silicas, respectively. All the obtained Co 3O 4-CeO 2 catalysts exhibited the similar symmetry with the parent silicas and well ordered mesostructures. The Co 3O 4-CeO 2 catalysts with 2D mesostructure showed lower catalytic activities than the corresponding 3D materials. The Co 3O 4-CeO 2 catalyst nanocasted from KIT-6 and with the Co/Ce ratio of 16/1 possessed the best catalytic benzene oxidation activity due to larger quantities of surface hydroxyl groups and surface oxygenated species. The mesostructured Co 3O 4-CeO 2 material thus shows great potential as a promising eco-environmental catalyst for benzene effective elimination.
| Original language | English |
|---|---|
| Pages (from-to) | 2078-2086 |
| Number of pages | 9 |
| Journal | Journal of Environmental Sciences |
| Volume | 23 |
| Issue number | 12 |
| DOIs | |
| State | Published - Dec 2011 |
| Externally published | Yes |
Keywords
- 2D/3D structural
- Benzene elimination
- Co/Ce ratios
- Mesoporous Co O -CeO
- Nanocasting