Self-catalyzed synthesis of mesoporous carbons with tunable pore size and structure by soft-templating method
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A series of mesoporous carbons (MCs) have been obtained through organic–organic self-assembly method by using phloroglucinol–formaldehyde as carbon precursor and a reverse amphiphilic triblock copolymer as a template. Because of its acidity, the phloroglucinol was used as a catalyst itself. Results show that the pore size and structure of MCs were tailored by simply tuning the weight content of formaldehyde while keeping other reactants constant. A cylindrical mesostructure was obtained when the weight content was 1.0, 1.2 and 1.4. Further increasing the weight content to 1.6 or 2.0, a three-dimensional cage-like mesostructure was obtained. Specific surface area and pore volume up to 485 m2/g and 0.78 cm3/g can be reached, respectively. In addition, the pore size can be tuned in the range of 4.9–14.8 nm by changing the content of formaldehyde.
KeywordsMesoporous carbons Soft-templating method Self-catalysis Pore size and structure control
This research was supported by the financial support of Fund of National Nature Science Foundation of China (NO.50602046), ICC CAS Fund for distinguished Young Scientist, State Education Ministry and Natural Science Foundation of Shanxi Province (NO.2007011075). Greatly thanks Prof. Zhi-hong Li and Prof Zhong-hua Wu from institute of High Energy and Physics for SAXS measurements assistance.
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