Preparation and characterization of templated porous carbons from sucrose by one-pot method and application as a CO₂ adsorbent

Authors: MELTEM GÜRBÜZ, FATMA TÜMSEK

Abstract: The templated porous carbons were prepared from sucrose by one-pot method. In this method in which the pre-synthesis of the hard template is eliminated, the porous carbons were produced by organic-inorganic self-assembly of sucrose, tetraethyl ortosilicate (TEOS), Pluronic P123 and n-butanol in an acidic medium, and subsequent carbonization. The synthesis parameters such as sucrose amount, TEOS molar ratio and carbonization temperature were evaluated for describing their effects on the pore structures of the synthesized carbons. The prepared porous carbons were characterized by N₂ adsorption, thermogravimetric analysis (TGA), Raman spectroscopy, X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM) techniques. The carbon dioxide adsorption uptakes of the obtained porous carbons were determined at 1 bar and 273 K. The templated carbon obtained with the lowest TEOS molar ratio exhibited the highest BET surface area of 1289 m² /g and micropore volume of 0.467 cm³ /g, and showed the highest CO₂ uptake of 2.28 mmol/g.

Keywords: Porous carbon, templated synthesis, one-pot method, CO₂ adsorption

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