Abstract: The modified Hummers method is used to prepare graphite oxide (GO) by freeze drying.3D nitrogen-doped graphene is synthesized from GO by one-step hydrothermal method and through three stripping methods including mild magnetic stirring,common ultrasonic and high power ultrasonic,respectively.The microstructure and morphology of the as-produced graphene are characterized by FT-IR,XRD,FESEM,EDS,Raman,XPS,TGA and AFM.The results show that different stripping methods can lead to nitrogen doped graphene with different morphologies,sizes,thicknesses and nitrogen contents.Mild magnetic stirring method will not cause great damages to the lamellar structure but can be used to prepare micron size nitrogen doped graphene with a thickness of about 1.1 nm.By using common ultrasonic stripping method,the lamellar of prepared nitrogen-doped graphene sheet begins to generate pore structure,and its thickness is around 0.8 nm.Under the cavitation effect of high power ultrasound,the stripping degree of lamellar is more obvious than under common ultrasound,and it is easier to form smaller size of 3D porous network structure,the lamellar thickness is about 0.6 nm.
李子庆, 赫文秀, 张永强, 刘斌, 蒋梦. 定向制备不同尺寸的3D掺氮石墨烯及其表征[J]. 现代化工, 2018, 38(2): 110-114.
LI Zi-qing, HE Wen-xiu, ZHANG Yong-qiang, LIU Bin, JIANG Meng. Directional preparation and characterization of 3D nitrogen-doped graphene with different sizes. Modern Chemical Industry, 2018, 38(2): 110-114.
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