Large scale production of highly conductive reduced graphene oxide sheets by a solvent-free low temperature reduction

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• 作者：Kyu Hyung Lee ; Byeongno Lee ; Son-Jong Hwang ; Jae-Ung Lee ; Hyeonsik Cheong ; Oh-Sun Kwon ; Kwanwoo Shin ; Nam Hwi Hur
• 刊名：Carbon
• 出版年：April, 2014
• 年：2014
• 卷：69
• 期：Complete
• 页码：327-335
• 全文大小：1690 K

文摘

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^{鈭?/sup>, 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 掳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.}