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@article{Tian:2021:10.26434/chemrxiv.14156732.v1,
author = {Tian, T and Hou, J and Ansari, H and Xiong, Y and L'Hermitte, A and Danaci, D and Pini, R and Petit, C},
doi = {10.26434/chemrxiv.14156732.v1},
title = {Mechanically Stable Monolithic Porous Boron Nitride with High Volumetric Adsorption Capacity},
url = {http://dx.doi.org/10.26434/chemrxiv.14156732.v1},
year = {2021}
}
TY - JOUR
AB - <jats:p>The development of adsorbents into structured and robust forms remains a challenge for emerging porous materials. In the context of porous boron nitride (BN), studies point to a tradeoff between mechanical stability, porosity, density, and adsorption kinetics. Approaches towards shaping and densification of porous BN have been mostly empirical since a detailed understanding of its formation mechanism, and how it impacts mechanical strength and porosity, is lacking. Here, we demonstrate a synthesis method that can directly produce a mechanically robust monolithic porous BN (mpBN) from an easily scalable polymeric precursor, which results in the highest volumetric surface area among porous BN samples to date. mpBN exhibits a high bulk density, 50% higher than BN powders and over ten times higher than the structured BN aerogels, while maintaining fast sorption kinetics. mpBN presents good mechanical strength, with hardness of 66.4 ± 4.5 MPa, <jats:italic>i.e. </jats:italic>one to two orders of magnitude higher than structured aerogels. We propose a mpBN formation mechanism which reveals that the crosslinked intermediates are responsible for the high mechanical strength of the final material. Our approach produces a form of BN that addresses the limitations of other adsorbents, and facilitate their application in gas separation and storage technologies. </jats:p><jats:p />
AU - Tian,T
AU - Hou,J
AU - Ansari,H
AU - Xiong,Y
AU - L'Hermitte,A
AU - Danaci,D
AU - Pini,R
AU - Petit,C
DO - 10.26434/chemrxiv.14156732.v1
PY - 2021///
TI - Mechanically Stable Monolithic Porous Boron Nitride with High Volumetric Adsorption Capacity
UR - http://dx.doi.org/10.26434/chemrxiv.14156732.v1
ER -