Journal
ACS NANO
Volume 7, Issue 10, Pages 8540-8546Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn402452p
Keywords
boron nitride; porous; aerogels; sp(2)-bonded; carbothermal reduction
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Funding
- Office of Energy Research, Office of Basic Energy Sciences, Materials Sciences and Engineering Division, of the U.S. Department of Energy [DE-AC0205CH11231]
- UC Lab Fees Research Program [12-LR235323]
- U.S. Department of Energy [DE-AC52-07NA27344]
- Air Force Office of Scientific Research [X10-8049-C]
- Center of Integrated Nanomechanical Systems under NSF [EEC-0832819]
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sp(2)-Bonded boron nitride aerogels are synthesized from graphene aerogels via carbothermal reduction of boron oxide and simultaneous nitridation. The color and chemical composition of the original gel change dramatically, while structural features down to the nanometer scale are maintained, suggesting a direct conversion of the carbon lattice to boron nitride. Scanning and transmission electron microscopies reveal a foliated architecture of wrinkled sheets, a unique morphology among low-density, porous BN materials. The converted gels display a high degree of chemical purity (>95%) and crystalline order and exhibit unique cross-linking structures.
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