Enhanced capacitive deionization performance of graphene by nitrogen doping.
Enhanced capacitive deionization performance of graphene by nitrogen doping.
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DOI：
10.1016/j.jcis.2015.01.003
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发表时间：
2015-05
影响因子：
9.9
通讯作者：
Xingtao Xu;L. Pan;Y. Liu;Ting Lu;Zhuo Sun
中科院分区：
文献类型：
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作者：
Xingtao Xu;L. Pan;Y. Liu;Ting Lu;Zhuo Sun
通过在氨气氛中对氧化石墨烯进行简单的热处理来制备氮掺杂石墨烯（NG）。采用扫描电子显微镜、拉曼光谱、氮气吸附-脱附、X射线光电子能谱、循环伏安和电化学阻抗等方法对NG的形貌、结构和电化学性能进行了表征。研究了NG在NaCl溶液中的电吸附性能，并与原始石墨烯（PG）进行了比较。结果表明，NG具有较高的比表面积、较高的比电容和较低的电荷转移电阻，当溶液初始电导率为100 μS cm−1时，NG的电吸附容量为4.81 mg g− 1，远高于PG的电吸附容量（3.85 mg g−1）。
Nitrogen-doped graphene (NG) was fabricated via a simple thermal treatment of graphene oxide in an ammonia atmosphere. The morphology, structure and electrochemical performance of NG were characterized by scanning electron microscopy, Raman spectroscopy, nitrogen adsorption–desorption, X-ray photoelectron spectroscopy, cyclic voltammetry and electrochemical impedance spectroscopy. The electrosorption performance of NG in NaCl solution was studied and compared with pristine graphene (PG). The results show that due to its high specific surface area, increased specific capacitance and low charge transfer resistance, NG exhibits high electrosorption capacity of 4.81 mg g−1when the initial solution conductivity is 100 μS cm−1, which are much higher than those of PG (3.85 mg g−1).