Large scale production of highly conductive reduced graphene oxide sheets by a solvent-free low temperature reduction |
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| Affiliation: | 1. Department of Chemistry, Sogang University, Seoul 121-742, Republic of Korea;2. Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 92115, USA;3. Department of Physics, Sogang University, Seoul 121-742, Republic of Korea;1. Thin Film Laboratory, Department of Physics, Karunya University, Coimbatore 641114, India;2. Department of Nanoscience and Technology, Karunya University, Coimbatore 641114, India;1. Department of Materials Science and Engineering, University of Illinois at Urbana–Champaign, Urbana, IL 61801, United States;2. Department of Polymer Science and Engineering, Inha University, Incheon 402-751, South Korea;3. Department of Chemical Engineering, Kangwon National University, Samcheok 245-711, South Korea;1. Department of Chemistry, Sogang University, Seoul 121-742, Republic of Korea;2. Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 305-343, Republic of Korea;1. School of Materials Science and Engineering, Beihang University, Beijing 100191, China;2. Beijing Key Laboratory for Powder Technology Research and Development, Beihang University, Beijing 100191, China;3. Institute of Materials Science, Technische Universität Darmstadt, Darmstadt 64287, Germany;4. School of Chemistry and Environment, Beihang University, Beijing 100191, China;5. State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China |
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| Abstract: | A novel one-pot process that can produce freestanding reduced graphene oxide (RGO) sheets in large scale through a mechanochemical method is presented, which is based on a 1:1 adduct of hydrazine and carbon dioxide (H3N+NHCO2−, solid hydrazine). We were able to synthesize RGO sheets by grinding solid hydrazine with graphene oxide (GO), followed by storing the mixed powder at 50 °C for 10 min. No solvents, nor large vessels, nor post-annealing at high temperatures are required. The resulting RGO sample was characterized by elemental analysis, X-ray diffraction, X-ray photoelectron spectroscopy, Raman spectroscopy, Brunauer–Emmett–Teller measurement, thermo gravimetric analysis, Fourier transform infrared spectroscopy, solid state nuclear magnetic resonance spectroscopy, and conductivity measurement. It exhibits excellent conductivity and possesses a high specific surface area. This reduction method was successfully applied for the fabrication of inkjet-printed RGO devices on a flexible substrate. |
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