Formation of Graphene Oxide Nanocomposites from Carbon Dioxide Using Ammonia Borane

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To efficiently recycle CO2 to economically viable products such as liquid fuels and carbon nanomaterials, the reactivity of CO2 is required to be fully understood. We have investigated the reaction of CO2 with ammonia borane (AB), both molecules being able to function as either an acid or a base, to obtain more insight into the amphoteric activity of CO2. in the present work, we demonstrate that CO2 can be converted to graphene oxide (GO) using AB at moderate conditions. The conversion consists of two consecutive steps: CO2 fixation (CO2 pressure <3 MPa and temperature <100 degrees C) and graphenization (600-750 degrees C under 0.1 MPa of N-2). The first step generates a solid compound that contains methoxy (OCH3), formate (HCOO), and aliphatic groups, while the second graphenization is the pyrolysis of the solid compound to produce graphene oxide-boron oxide nanocomposites, which have been confirmed by micro-Raman spectroscopy, solid-state C-13 and B-11 magic angle spinning-nuclear magnetic resonance (MAS NMR), transmission electron microscopy (TEM), and atomic force microscopy (AFM). Our observations also show that the mass of solid product in CO2 fixation process and raw graphene oxide nanocomposites is twice and 1.2 times that of AB initially charged, respectively. The formation of aliphatic groups without using metal-containing compounds at mild conditions is of great interest to the synthesis of various organic products starting from CO2.
Publisher
AMER CHEMICAL SOC
Issue Date
2012-01
Language
English
Article Type
Article
Keywords

REDUCTION; NMR; DECOMPOSITION; NANOTUBES; LITHIUM; SODIUM; CO2

Citation

JOURNAL OF PHYSICAL CHEMISTRY C, v.116, pp.2639 - 2644

ISSN
1932-7447
DOI
10.1021/jp210295e
URI
http://hdl.handle.net/10203/103954
Appears in Collection
CBE-Journal Papers(저널논문)
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