Institute of Chemistry, Military University of Technology, 00-908 Warsaw, Poland.
Department of Chemistry and Biochemistry, Advanced Materials and Liquid Crystal Institute, Kent State University, Kent, OH 44242, USA.
Molecules. 2021 Mar 24;26(7):1826. doi: 10.3390/molecules26071826.
Highly porous activated carbons were synthesized via the mechanochemical salt-templating method using both sustainable precursors and sustainable chemical activators. Tannic acid is a polyphenolic compound derived from biomass, which, together with urea, can serve as a low-cost, environmentally friendly precursor for the preparation of efficient N-doped carbons. The use of various organic and inorganic salts as activating agents afforded carbons with diverse structural and physicochemical characteristics, e.g., their specific surface areas ranged from 1190 m·g to 3060 m·g. Coupling the salt-templating method and chemical activation with potassium oxalate appeared to be an efficient strategy for the synthesis of a highly porous carbon with a specific surface area of 3060 m·g, a large total pore volume of 3.07 cm·g and high H and CO adsorption capacities of 13.2 mmol·g at -196 °C and 4.7 mmol·g at 0 °C, respectively. The most microporous carbon from the series exhibited a CO uptake capacity as high as 6.4 mmol·g at 1 bar and 0 °C. Moreover, these samples showed exceptionally high thermal stability. Such activated carbons obtained from readily available sustainable precursors and activators are attractive for several applications in adsorption and catalysis.
通过机械化学盐模板法，使用可持续的前体和可持续的化学活化剂合成了高多孔活性炭。单宁酸是一种源自生物质的多酚化合物，它与尿素一起可以作为制备高效 N 掺杂碳的低成本、环保前体。各种有机和无机盐作为活化剂的使用，使碳具有不同的结构和物理化学特性，例如，其比表面积范围为 1190 m·g 至 3060 m·g。将盐模板法和化学活化与草酸钾结合使用，似乎是合成具有 3060 m·g 比表面积、3.07 cm·g 总孔体积和高 H 和 CO 吸附能力（分别在-196°C 下为 13.2 mmol·g 和在 0°C 下为 4.7 mmol·g）的高多孔碳的有效策略。该系列中最微孔碳在 1 巴和 0°C 下的 CO 吸附能力高达 6.4 mmol·g。此外，这些样品表现出异常高的热稳定性。这些由易于获得的可持续前体和活化剂获得的活性炭在吸附和催化方面具有吸引力。
