Boron Nitride from Ammonia Borane and Alkali Amidoboranes and Its Features for Carbon Dioxide Capture

Abstract

Herein, three boranes are studied as potential precursors of boron nitride (BN) and their carbon dioxide adsorption capacity is evaluated. The selected boranes are ammonia borane (AB, NH3BH3), lithium amidoborane (LiAB, LiNH2BH3), and sodium amidoborane (NaAB, NaNH2BH3), and they are pyrolyzed at four different temperatures. All the characterization techniques show the formation of BN from the three boranes. However, LiAB and NaAB form hexagonal BN (h‐BN) at a lower temperature in comparison with AB. The insertion of the alkali metal inside the BN structure is also evidenced. These materials show interesting results when they are exposed to a CO2 atmosphere. The materials are able to adsorb CO2 at nearly ambient conditions, and the best results are achieved with samples that do not present a crystalline structure. AB treated at 600 °C uptakes 34 cm3 g−1 (66.8 mg g−1) at 1.5 bar CO2 and 30 °C. Considering that the materials developed in this study are nonporous, the results are promising, opening new perspectives as potential sorbents for CO2.

A boron nitride–carbon composite derived from ammonia borane and ZIF-8 with promises for the adsorption of carbon dioxide

“…AB@ZIF-8 underwent pyrolysis in a Vectar Ltd VTF7 tubular furnace at 800 °C, a temperature choice based on a previous study which revealed that bulk BN obtained from AB could adsorb CO 2 when pyrolyzed between 600 and 800 °C. 23…”

Nanostructured Carbon-Doped BN for CO2 Capture Applications

“…Unfortunately, many steps are needed to synthesize porous BN materials with a good composition, structure and porosity (such as hard templating methods or polymer-derived ceramic routes) [18,19]. Moreover, we suspect that defects within the BN structure and/or carbon-doping would be needed to improve gas sorption [9]. In the present work, a porous carbon-doped BN is synthesized in order to enhance its CO 2 adsorption performance.…”

“…BN can indeed be used in applications within corrosive environments where the widely investigated oxide ceramics cannot work properly. Boron nitride (BN) is a non-oxide ceramic with a very wide range of applications, such as for energy or medicine [7][8][9]. It can be synthesized from numerous molecular precursors, and notably, from ammonia borane (AB) [9][10][11].…”

“…Boron nitride (BN) is a non-oxide ceramic with a very wide range of applications, such as for energy or medicine [7][8][9]. It can be synthesized from numerous molecular precursors, and notably, from ammonia borane (AB) [9][10][11]. AB is a molecule with the chemical structure H 3 N-BH 3 .…”