Abstract
AbstractReaction of low surface area carbon with a mixture of urea and boric acid at 930 °C yields a composition close to BC4N with a graphitic structure. BC4N was characterized by electron energy loss spectroscopy, X‐ray photoelectron spectroscopy, transmission electron microscopy, Raman spectroscopy, and X‐ray diffraction. BC4N is a porous ceramic with a surface area of 428 m2·g–1, and shows a CO2 uptake of 40 wt‐%. The layered structure of BC4N involves a random distribution of boron, carbon, and nitrogen atoms and shows high thermal stability up to 1000 °C. A comparative analysis of the structure and properties of BC4N and graphene using first‐principles pseudopotential based density functional theoretical calculations is presented. The calculations predict it to be an insulator. The bulk modulus of BC4N exhibits an interesting dependence on the ordering of boron and nitrogen on the graphene lattice.
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