Hierarchical Porous Nitrogen‐Doped Spray‐Dried Graphene for High Performance Capacitive Deionization

Hierarchical Porous Nitrogen‐Doped Spray‐Dried Graphene for High Performance Capacitive Deionization

Graphene foam materials have attracted particular attention for capacitive deionization (CDI) applications due to their robust conductive framework and open three‐dimensional porous structures. However, their salt adsorption capacities (SACs) are limited by the bland macropores and poor compatibilit...

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Bibliographic Details
Published in:Advanced energy and sustainability research Vol. 3; no. 3
Main Authors: Noonan, Owen, Kong, Yueqi, Liu, Yang, Kalantari, Mohammed, Kumar Nanjundan, Ashok, Huang, Xiaodan, Yu, Chengzhong
Format: Journal Article
Language:English
Published: Argonne John Wiley & Sons, Inc 01-03-2022
Wiley-VCH
Subjects:
Adsorption
Aqueous environments
capacitive deionization
Carbon
Composite materials
Deionization
Desalination
Fourier transforms
Graphene
Nitrogen
nitrogen doping
Polyvinyl alcohol
Pore size
Porosity
porous material
Porous materials
Salt
Scanning electron microscopy
Sodium chloride
Spectrum analysis
spray drying
Surfactants
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Summary:Graphene foam materials have attracted particular attention for capacitive deionization (CDI) applications due to their robust conductive framework and open three‐dimensional porous structures. However, their salt adsorption capacities (SACs) are limited by the bland macropores and poor compatibility with aqueous environments. Herein, hierarchical porous nitrogen‐doped spray‐dried graphene (N‐SDG) is prepared through a spray‐drying method followed by low‐temperature nitrogen doping. The resulting material exhibits hierarchical porosity and a nitrogen‐rich carbon framework which demonstrates an improved SAC of 19.6 mg g−1 in 500 mg L−1 NaCl solution, amongst the highest reported for graphene‐based CDI materials. The method herein demonstrates a commercially attractive approach for the production of N‐doped porous graphene material for CDI applications. These findings are expected to underpin new developments in low‐cost graphene‐based materials for a range of applications. A hierarchical porous nitrogen‐doped spray‐dried graphene is prepared through a spray drying method followed by low‐temperature nitrogen doping. The resulting material exhibits high salt adsorption capacity of 19.6 mg g−1 and excellent cycling stability, amongst the highest reported for graphene‐based CDI materials.
ISSN:2699-9412
2699-9412
DOI:10.1002/aesr.202100190