Thermal transformation of betulin by alkaline activation

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• 作者：N. M. Mikova ; N. V. Chesnokov ; E. V. Mazurova…
• 关键词：betulin ; alkaline activation ; carbonization ; porosity ; adsorption properties ; surface morphology
• 刊名：Russian Journal of Bioorganic Chemistry
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：42
• 期：7
• 页码：741-747
• 全文大小：
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Biochemistry, general; Bioorganic Chemistry; Organic Chemistry; Biomedicine general;
• 出版者：Pleiades Publishing
• ISSN：1608-330X
• 卷排序：42

文摘

Carbonization of betulin (betulinol) as an individual carbon precursor was studied in the temperature range of 400–800°C in the presence of KOH. Differential thermal analysis and IR spectroscopy were used to determine the influence of KOH on major structural changes and the chemical composition of betulin, which occur at 400–500°C. It was shown by scanning electron microscopy and BET analysis that KOH promoted the formation of a developed specific surface (S_BET 1350–2100 m2/g) at temperatures of 600–800°C and had the greatest influence on the textural and adsorption properties of the resulting porous carbon adsorbents. It has been found that the formation of microporous carbon materials with a pore size of 1.92 nm and a specific micropore surface area of 1275 m2/g is possible upon the activation of betulin with KOH at 800°C. Betulin may be proposed to control the porosity of the carbon carriers derived from birch wood.