285951 Transformation of Carbon Dioxide Into Boron-Graphene Oxide Nanocomposites Using a Reducing Agent

Monday, October 29, 2012: 4:00 PM
325 (Convention Center )
Jae W. Lee1, Junshe Zhang1, Yu Zhao2, Daniel L. Akins3, Ruth Stark4, Xudong Guan5 and Ah-young Byun6, (1)Department of Chemical Engineering, The City College of New York, New York, NY, (2)Department of Chemistry, The City College of New York, New York, NY, (3)Department of Chemistry and CASI, The City College of New York, New York, NY, (4)Chemistry, CCNY, New York, NY, (5)Chemistry Department, CCNY, New York, NY, (6)Chemical Biomolecular Eng, KAIST, Daejeon, South Korea

Carbon dioxide (CO2), a readily available, low-cost and sustainable carbon source, could be converted to liquid fuels, useful chemicals, and carbon materials. Among the several alternatives of reducing CO2, attractive options include transforming CO2 to diamonds and nanotubes, either through direct CO2 splitting or via reaction with metals subject to pressures higher than 70 MPa. Nonetheless, the possibility of CO2 reduction to other carbon nanomaterials like graphene oxide without using metal-containing compounds and without employing extreme conditions has not been demonstrated. Graphene oxide is not only a suitable and scalable precursor of graphene, but also a flexible platform for biological, chemical, electronic, medical, and optical applications. This talk reports the conversion of CO2 to graphene oxide nanocomposites using ammonia borane (NH3BH3), which is a well-known candidate material for hydrogen storage. The conversion involves two consecutive steps: carbon fixation and then graphenization. The carbon fixation is the reaction of CO2 with NH3BH3 under mild temperature and pressure conditions (T < 100 oC and P < 3 MPa) to produce a solid compound that contains methoxy (OCH3), formate (COOH) and aliphatic groups, whereas the graphenization is the pyrolysis of this solid compound at high temperatures (T > 600 oC) and atmospheric pressure of nitrogen to generate graphene oxide-boron oxide nanocomposites. The generation of the nanocomposites is confirmed by micro-Raman spectroscopy, solid state 13C and 11B magic angle spinning-nuclear magnetic resonance (MAS-NMR), transmission electron microscopy (TEM), and atomic force microscopy (AFM).

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See more of this Session: Sustainable Chemicals: Advances in Innovative Processes
See more of this Group/Topical: Environmental Division