4.8 Article

Hydrophilicity-Controlled Carbon Aerogels with High Mesoporosity

Journal

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 131, Issue 3, Pages 904-+

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/ja808132u

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Funding

  1. Ministry of Education, Culture, Sports, Science and Technology, Japan [18-06059]
  2. Japan Society for the Promotion of Science (JSPS)

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Highly mesoporous carbon aerogels with hydrophilicity-controlled pore walls were synthesized using a unique approach that combines CO2 supercritical drying and colloidal silica nanocasting. The samples were characterized using nitrogen adsorption at 77 K, water adsorption at 303 K, field-emission scanning electron microscopy (FE-SEM), thermogravimetric analysis, X-ray photoelectron spectroscopy, and Raman spectroscopy. The nitrogen adsorption revealed the presence of micropores and mesopores with narrow pore size distributions. The water adsorption suggested that the hydrophilicity of carbon aerogels can be controlled by the residual silica in their pore watts. The FE-SEM observation confirmed the presence of hierarchical mesostructures and the high mesoporosity. The high surface area, large nanopore volume, and hydrophilicity-controlled pore watts make these aerogels well-suited for many applications.

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