A topologically substituted boron nitride hybrid aerogel for highly selective CO2 uptake

作者：Kutty, R. Govindan; Sreejith, Sivaramapanicker; Kong, Xianghua; He, Haiyong; Wang, Hong; Lin, Junhao; Suenaga, Kazu; Lim, Chwee Teck; Zhao, Yanli^*; Ji, Wei^*; Liu, Zheng^*

来源：Nano Research, 2018, 11(12): 6325-6335.

DOI：10.1007/s12274-018-2156-z

• boron nitride
• boron nitride nanotube
• aerogel
• quadrupole moment
• selective CO2 adsorption

A topologically mediated synthesis of porous boron nitride aerogel has been experimentally and theoretically investigated for carbon dioxide (CO2) uptake. Replacement of the carbon atoms in a precursor aerogel of graphene oxide and carbon nanotubes was achieved using an elemental substitution reaction, to obtain a boron and nitrogen framework. The newly prepared BN aerogel possessed a specific surface area of 716.56 m(2)/g and exhibited an unprecedented twenty-fold increase in CO2 uptake over N-2, adsorbing 100 cc/g at 273 K and 80 cc/g in ambient conditions, as verified by adsorption isotherms via the multipoint Brunauer-Emmett-Teller (BET) method. Density functional theory calculations were performed to give hints on the mechanism of such high selectivity of CO2 over N-2 adsorption in BN aerogel, which may be due to the interaction between the intrinsic polar nature of B-N bonds and the high quadrupole moment of CO2 over N-2.

• 出版日期2018-12
• 单位中国人民大学; 南阳理工学院