N-Doped Carbon Nanofibrous Film with Unique Wettability, Enhanced Supercapacitive Property, and Facile Capacity to Demulsify Surfactant Free Oil-in-water Emulsions

Abstract

Electrospinning and calcination technique have been combined to fabricate N-doped carbon nanofibers(N-CNFs) by introducing amino grafted few-layered hexagonal boron nitride (amino@BN) into polyacrylonitrile(PAN) matrix as filler followed by carbonization. For the high N-doping level(10.7%, atomic fraction) with the final product, the as-prepared N-CNFs exhibit interesting surface wettability(superamphiphilicity in air and underwater oleophilicity). Moreover, compared with pristine PAN derived carbon nanofibers(marked as CNFs), N-CNFs exhibit higher graphic structure under fixed carbonizing temperature as well. Taking these advantages aforementioned, the as-prepared N-CNFs exhibit good specific capacitance(ca. 200.1 F/g) without activation treatment at the current density of 0.5 A/g in three-electrode configuration, which is about 149% that of CNFs(ca. 134 F/g). What’s more, our N-CNFs also display the unexpected capacity to demulsify diverse surfactant free oil-in-water emulsions by simple filtration in large scale with the high water flux ca.(23578±150) L·m−2·h−1

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Acknowledgements

This work is supported by the National Natural Science Foundation of China (No.52073238), the Open Funds of the State Key Laboratory of Oil and Gas Reservoir Geology and Exploration of Southwest Petroleum University, China(Nos. PLN2018-06, PLN2020-19) and the Fund of the Sichuan Provincial University Key Laboratory of Oil and Gas Field Materials, China(Nos.X151518KCL04, X151518KCL07).

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Correspondence to Jingyu Chen or Zhenzhong Hu.

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Wang, R., Lei, W., Wang, L. et al. N-Doped Carbon Nanofibrous Film with Unique Wettability, Enhanced Supercapacitive Property, and Facile Capacity to Demulsify Surfactant Free Oil-in-water Emulsions. Chem. Res. Chin. Univ. (2021). https://doi.org/10.1007/s40242-021-0434-x

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Keywords

  • Carbon nanofibrous membrane
  • Unique wettability
  • Supercapacitor
  • Demulsification of oil-water emulsion