Improved capture of carbon dioxide and methane via adding micropores within porous boron nitride fibers

In this paper, a novel type of micropore-rich boron nitride (BN) fibers (m-BNFs) was prepared by adding a surfactant hexamethylenetetramine in the traditional melamine-diborate (M·2B) precursor of conventional porous BN fibers (BNFs). As a result, extra micropore distribution could be introduced within m-BNFs bodies. Due to adding of the micropores, the CO 2 capture capacities of the BN fibers were improved to be 2.85 mmol g −1 , which were significantly higher than that of original porous BNFs. Also, these m-BNFs would have an enhanced adsorption capacity of methane, the amount of up to 0.71 mmol g −1 . At the same time, these new m-BNFs materials showed excellent thermal stability, which would be more valuable for advanced gas adsorption working in a high-temperature environment in the future.