Physicochemical Study of Oxidized Mesoporous Carbon Materials

Abstract

Physicochemical methods were used to study the oxidized carbon materials obtained by oxidation of the Tekhnosorb mesoporous carbon by 2–30% solutions of hydrogen peroxide. Using IR spectroscopy, titrimetry, and chemical analysis, it was shown that the oxidation of the carbon material involves the formation of oxygenated surface groups, sp²-COOH, sp³-C–OH, sp² > C–OH, sp² > C=O, etc. The X-ray diffraction patterns of the oxidized carbons exhibied weak broad reflections typical of hydrated graphite oxide with slightly increased interplanar spacing d₀₀₂. The oxidation of the carbon material is accompanied by increase in the specific surface area and free pore volume without significant degradarion of the carbon nanoblocks.