Surface Functionalization and Pore Size Manipulation for Carbons of Ordered Structure
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- 作者：Zuojiang Li and Sheng Dai
- 刊名：Chemistry of Materials
- 出版年：2005
- 出版时间：April 5, 2005
- 年：2005
- 卷：17
- 期：7
- 页码：1717 - 1721
- 全文大小：174K
- 年卷期：v.17,no.7(April 5, 2005)
- ISSN：1520-5002
文摘
Covalent functionalization and pore size manipulation were successfully achieved on ordered mesoporouscarbons, by using a method in which diazonium compounds were in-situ generated and reacted with thecarbon surface. Aryl groups substituted on the 4-poisiton (Ar-R, R = chlorine, ester, and alkyl) werecovalently attached to the surface of hexagonally structured carbon, which was synthesized using orderedsilica SBA-15 as template. The presence of these functional groups on the modified carbons was confirmedwith Fourier transform infrared spectroscopy, thermogravimetric analysis, electron microscopy, and nitrogenadsorption. A relatively high grafting density of ~1.5 
mol/m2 was achieved. Chemical modificationconsiderably changed the pore width from 3.0 nm for the unmodified samples to ~1.4 nm for modifiedsamples, while the primary hexagonal structure and the unit parameter of ordered mesoporous carbonwere retained after attachment of surface functionalities.
mol/m2 was achieved. Chemical modificationconsiderably changed the pore width from 3.0 nm for the unmodified samples to ~1.4 nm for modifiedsamples, while the primary hexagonal structure and the unit parameter of ordered mesoporous carbonwere retained after attachment of surface functionalities.