Abstract
Nitrogen-doped functional graphene nanocomposites (GO-MRF-x) for electrode materials in a capacitive deionization (CDI) application were conveniently prepared through a sol–gel polycondensation reaction catalyzed by Na2CO3 under ambient pressure drying. The materials showed high surface functionalization (N and O groups) which were confirmed by X-ray photoelectron spectroscopy (XPS). The molar ratio of melamine with resorcinol had a marked effect on the specific surface area and porosity of the nanocomposites. The characterization results showed that with the specific surface area of 387 m2 g−1 and N content of 7.26 wt%, laminated GO-MRF-0.8 material exhibited a good performance with high specific capacitance (222 F g−1), low charge-transfer resistance (0.10 Ω), and electrosorption capacity (16.72 mg g−1). Furthermore, the electrosorption isotherms were studied, and it was found that the ion electrosorption behavior of NaCl on GO-MRF-0 followed multilayer adsorption, whereas GO-MRF-0.8 exhibited a change from monolayer to multilayer.
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It is a pleasure to acknowledge the generous financial support of this research by the National Natural Science Foundation of China (51372011).
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Wei, Y., Huo, Y., Tian, G. et al. Nitrogen-doped functional graphene nanocomposites for capacitive deionization of NaCl aqueous solutions. J Solid State Electrochem 20, 2351–2362 (2016). https://doi.org/10.1007/s10008-016-3251-2
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DOI: https://doi.org/10.1007/s10008-016-3251-2