AUTHOR=Zhang Hainan , Wang Zeming , Luo Xudong , Lu Jinlin , Peng Shengnan , Wang Yongfei , Han Lu 

TITLE=Constructing Hierarchical Porous Carbons With Interconnected Micro-mesopores for Enhanced CO2 Adsorption

JOURNAL=Frontiers in Chemistry

VOLUME=7

YEAR=2020

URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2019.00919

DOI=10.3389/fchem.2019.00919

ISSN=2296-2646

ABSTRACT=<p>A high cost-performance carbon dioxide sorbent based on hierarchical porous carbons (HPCs) was easily prepared by carbonization of raw sugar using commercially available nano-CaCO<sub>3</sub> as a double-acting template. The effects of the initial composition and carbonization temperature on the micro-mesoporous structure and adsorption performance were examined. Also, the importance of post-activation behavior in the development of micropores and synthesis route for the formation of the interconnected micro-mesoporous structure were investigated. The results revealed excellent carbon dioxide uptake reaching up 2.84 mmol/g (25<sup>o</sup>C, 1 bar), with micropore surface area of 786 m<sup>2</sup>/g, micropore volume of 0.320 cm<sup>3</sup>/g and mesopore volume of 0.233 cm<sup>3</sup>/g. We found that high carbon dioxide uptake was ascribed to the developed micropores and interconnected micro-mesoporous structure. As an expectation, the optimized HPCs offers a promising new support for the high selective capture of carbon dioxide in the future.</p>