Abstract
Covalent functionalization and pore size manipulation were successfully achieved on ordered mesoporous carbons, by using a method in which diazonium compounds were in-situ generated and reacted with the carbon surface. Aryl groups substituted on the 4-poisiton (Ar - R, R = chlorine, ester, and alkyl) were covalently attached to the surface of hexagonally structured carbon, which was synthesized using ordered silica SBA-15 as template. The presence of these functional groups on the modified carbons was confirmed with Fourier transform infrared spectroscopy, thermogravimetric analysis, electron microscopy, and nitrogen adsorption. A relatively high grafting density of ∼1.5 μmol/m 2 was achieved. Chemical modification considerably changed the pore width from 3.0 nm for the unmodified samples to ∼1.4 nm for modified samples, while the primary hexagonal structure and the unit parameter of ordered mesoporous carbon were retained after attachment of surface functionalities.
| Original language | English |
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| Pages (from-to) | 1717-1721 |
| Number of pages | 5 |
| Journal | Chemistry of Materials |
| Volume | 17 |
| Issue number | 7 |
| DOIs | |
| State | Published - Apr 5 2005 |