Production of Few-Layer Graphene via Enhanced High-Pressure Shear Exfoliation in Liquid for Supercapacitor Applications
Production of Few-Layer Graphene via Enhanced High-Pressure Shear Exfoliation in Liquid for Supercapacitor Applications
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DOI：
10.1021/acsanm.8b00515
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发表时间：
2018-06
影响因子：
5.9
通讯作者：
Kun Zhang;Jie Tang;Jinshi Yuan;Jing Li;Yige Sun;Y. Matsuba;Da-Ming Zhu;L. Qin
中科院分区：
文献类型：
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作者：
Kun Zhang;Jie Tang;Jinshi Yuan;Jing Li;Yige Sun;Y. Matsuba;Da-Ming Zhu;L. Qin
开发了一种在高压流体中通过增强剪切剥离制备石墨烯的新方法。在剥离过程中，分散在N-甲基-2-吡咯烷酮（NMP）溶液中的石墨薄片通过高压泵推动通过剥离管，由于湍流，这在石墨薄片上产生高剪切应力，导致石墨烯片从石墨薄片剥离。原子力显微镜（AFM）和透射电子显微镜（TEM）图像显示，所产生的石墨烯片具有单层至约12层的厚度。X射线光电子能谱（XPS）和拉曼和红外（IR）光谱分析的结果表明，在该过程中，既没有明显的基面缺陷也没有氧化物引入到石墨烯片中。石墨溶液可以在循环回路中连续处理。在100 MPa的压力下和处理2小时后，以约15 ± 0.3%的产率获得剥离的石墨烯。T...
A novel method for producing graphene via enhanced shear exfoliation in a high-pressure fluid has been developed. In the process of exfoliation, graphite flakes, dispersed in a solution of N-methyl-2-pyrrolidone (NMP), were pushed through the exfoliation tube by a high-pressure pump, which produces high shear stresses on the graphite flakes due to the turbulent flow, causing the peeling-off of graphene sheets from the graphite flake. Atomic force microscopy (AFM) and transmission electron microscopy (TEM) images show that produced graphene sheets have thicknesses ranging from monolayer to about 12 layers. The results of X-ray photoelectron spectroscopy (XPS) and Raman and infrared (IR) spectroscopy analyses reveal that neither basal-plane defects nor oxides were noticeably introduced to graphene sheets in the process. The graphite solution can be continuously treated in a circular loop. At a pressure of 100 MPa and after 2 h of treatment, exfoliated graphene was obtained with a yield of about 15 ± 0.3%. T...