Microporous carbon was prepared by carbonization of carboxymethylcellulose and its sodium salt introduced various amounts of iodine. The iodine introducing treatment was performed by exposing raw materials to iodine vapor. Interaction between the carbon and water molecules was investigated by several methods related to water adsorption. The iodine treatment gave the porous carbons without reducing their char yield. The treatment on the sodium salt to I/Na molar ratio ≈ 1 gave the carbon both the largest microporous surface area of ca. 900 m2/g and the amount of acidic surface functional groups of ca. 1.81 mmol/g in the carbon which led to a higher interaction with water. The introduced acidic functional groups contributed to an increase in active site of water adsorption. It was expected that a porous carbon with simultaneous and suitable improving of char yield, porosity, and surface wettability would be achieved by the simple processing of iodine treatment and carbonization from cellulose-based resources.
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This work was supported by JSPS KAKENHI Grant Numbers JP15K06438 and 19K05000. JASCO NRS2100 used for Raman spectrum measurement is a shared equipment at the Center for Instrumental Analysis, University of Yamanashi.
This work was supported by JSPS KAKENHI Grant Numbers JP15K06438 and 19K05000.
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Miyajima, N., Matsumura, T., Yanagisawa, T. et al. Simultaneous control of the pore volume and the surface wettability in porous carbons prepared by carbonization of iodine-treated cellulose derivatives. J Porous Mater 28, 271–277 (2021). https://doi.org/10.1007/s10934-020-00986-x
- Porous carbon
- Iodine stabilization
- Water adsorption