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Nano Research

Article Title

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

Authors

R. Govindan Kutty, Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
Sivaramapanicker Sreejith, Center for Advanced 2D Materials and Graphene Research Center, National University of Singapore, 6 Science Drive 2, Singapore 117546, Singapore Biomedical Institute for Global Health Research and Technology, National University of Singapore, 14 Medical Drive, Singapore 117599, Singapore
Xianghua Kong, Department of Physics and Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-Nano Devices, Renmin University of China, Beijing 100872, China
Haiyong He, Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
Hong Wang, Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
Junhao Lin, National Institute of Advanced Industrial Science and Technology (AIST), AIST Central 5, Tsukuba 305-8565, Japan
Kazu Suenaga, National Institute of Advanced Industrial Science and Technology (AIST), AIST Central 5, Tsukuba 305-8565, Japan
Chwee Teck Lim, Center for Advanced 2D Materials and Graphene Research Center, National University of Singapore, 6 Science Drive 2, Singapore 117546, Singapore Biomedical Institute for Global Health Research and Technology, National University of Singapore, 14 Medical Drive, Singapore 117599, Singapore Department of Biomedical Engineering, National University of Singapore, Singapore 117543, Singapore
Yanli Zhao, Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21-Nanyang Link, Singapore 637371, Singapore
Wei Ji, Department of Physics and Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-Nano Devices, Renmin University of China, Beijing 100872, China
Zheng Liu, Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore

Keywords

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

Abstract

ABSTRACT 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 m2/g and exhibited an unprecedented twentyfold increase in CO2 uptake over N2, 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 N2 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 N2.

Graphical Abstract

Publisher

Tsinghua University Press

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