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Related Concept Videos

Ion Exchange01:17

Ion Exchange

693
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
693

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Related Experiment Video

Updated: Oct 9, 2025

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes
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Nitrogen-enriched micro-mesoporous carbon derived from polymers organic frameworks for high-performance capacitive

Jianpei Zhang1, Xun-An Ning1, Danping Li2

  • 1Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, School of Environment Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.

Journal of Environmental Sciences (China)
|December 24, 2021
PubMed
Summary

Nitrogen-enriched porous carbon electrodes show improved performance for capacitive deionization (CDI). Carbonizing Schiff base network-1 at 600°C yielded optimal electrode material for efficient water desalination.

Keywords:
Capacitive deionizationMicro-mesoporous CarbonNitrogen-doped carbonPolymers organic frameworks

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Environmental Science

Background:

  • Nitrogenization enhances capacitive deionization (CDI) performance in porous carbon materials.
  • Polymer organic frameworks with heteroatom doping are ideal precursors for high-performance CDI electrodes due to their ordered structure and stability.

Purpose of the Study:

  • To fabricate nitrogen-enriched micro-mesoporous carbon (NMC) electrodes via carbonization of Schiff base network-1.
  • To evaluate the effect of carbonization temperature on NMC properties and CDI performance.

Main Methods:

  • Schiff base network-1 was carbonized at 500, 600, and 700°C to produce NMCs.
  • Characterization included SEM, FTIR, XRD, N2 adsorption-desorption, contact angle, CV, and EIS.
  • Electrochemical performance was assessed for CDI applications.

Main Results:

  • The NMC carbonized at 600°C exhibited the highest specific capacitance (152.33 F/g) and electrosorption capacity (25.53 mg/g).
  • This optimal performance is attributed to its high nitrogen content (15.57%) and surface area (312 m²/g).

Conclusions:

  • Nitrogen-enriched micro-mesoporous carbon derived from Schiff base network-1 is a promising electrode material for CDI.
  • Optimized carbonization temperature is crucial for maximizing CDI performance in these materials for desalination.