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Effect of Different Nitrogen Sources on Structure and Properties of Nitrogen-doped Graphene |
Ziqing LI, Wenxiu HE(), Yongqiang ZHANG, Huiying YU, Xingsheng LI, Bin LIU |
School of Chemistry and Chemical Engineering, Inner Mongolia University of Science & Technology, Baotou 014010, China |
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Cite this article:
Ziqing LI, Wenxiu HE, Yongqiang ZHANG, Huiying YU, Xingsheng LI, Bin LIU. Effect of Different Nitrogen Sources on Structure and Properties of Nitrogen-doped Graphene. Chinese Journal of Materials Research, 2018, 32(8): 616-624.
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Abstract Graphite oxide (GO) was prepared via freeze-drying process of a modified Hummers method and then nitrogen-doped graphene was synthesized by one-step hydrothermal method with hydrazine hydrate, ethylenediamine, ammonia and urea as nitrogen sources and reductants respectively. The microstructure and morphology of the as-produced graphene were characterized by means of Fourier transform infrared spectroscopy, X-ray diffraction, field emission scanning electron microscope, X-ray photoelectron spectroscopy, synchronous thermogravimetric analyzer and nitrogen adsorption-desorption analyzer. The electrochemical performance of the prepared products was assessed by means of cyclic voltammetry, electrochemical impedance spectroscopy, galvanostatic charge/discharge technology. Results show that the four nitrogen-containing agents could effectively reduce GO to produce different graphenes, the corresponding nitrogen content (in mass fraction) of which is 4.99%, 7.7%, 6.35% and 9.18%, respectively. The doped-N atoms coupled into the graphene lattice in forms of "pyridinic N", "pyrrolic N" and "graphitic N". The specific capacitance of the nitrogen-doped graphene prepared with ethylenediamine and urea as reductants could reach 187.6 F·g-1 and 191.6 F·g-1 respectively, implying excellent electrochemical performance.
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Received: 22 May 2017
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Fund: Supported by Natural Science Foundation of Inner Mongolia (No. 2015MS0208), Youth Science and Technology Talents Project of Inner Mongolia Education Department--the Youth Hi-Tech Talents A Class Program(No. NJYT-14-A08), Science and Technology Planning Programs of Baotou City of China (Nos. 2015C2004-1 & 2016-4) |
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