Article ; Online: Controlled Fabrication of Nitrogen-Doped Porous Carbon Foam with Refined Hierarchical Architectures for Desalination via Capacitive Deionization
Journal of Colloid And Interface Science. 2023 Apr. 18,
2023
Abstract: Porous carbon materials have been regarded as a promising alternative to activated carbon for desalination via capacitive deionization (CDI) due to refined architectures and functionalities. However, it is still challenging to obtain a controlled ... ...
| Abstract | Porous carbon materials have been regarded as a promising alternative to activated carbon for desalination via capacitive deionization (CDI) due to refined architectures and functionalities. However, it is still challenging to obtain a controlled hierarchical pore structure and considerable nitrogen-doped content by convenient method. Herein, nitrogen-doped hierarchical porous carbon foams (NHCFs) with different microstructural features, nitrogen contents and nitrogen species and were successfully fabricated via a stepwise pyrolysis carbonization strategy using easily available melamine foam. Due to the synergistic effect of hierarchical porous structure and doped nitrogen, the optimized NHCF sample carbonized at 800℃ (NHCF-800) exhibited a maximum desalination capacity of 30.1 mg g⁻¹ at the optimal operating parameters (500 mg L⁻¹ NaCl solution, 1.2 V) and an excellent regeneration performance after 50 continuous adsorption-desorption cycles. Furthermore, density functional theory (DFT) was also conducted to elaborate the disparity of sodium adsorption energy among the nitrogen species for in-depth understanding, and it mainly benefits from the ascendency of the pyrrolic-N and pyridinic-N over the graphitic-N dopant. This work paves the way of rational regulation of nitrogen-doped process and hierarchical porous structure carbon as CDI electrode materials for desalination. |
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| Keywords | activated carbon ; adsorption ; carbonization ; deionization ; density functional theory ; desalination ; electrodes ; energy ; foams ; melamine ; nitrogen ; pyrolysis ; sodium ; synergism ; Porous carbon ; Nitrogen-doped ; Hierarchical pore ; Capacitive deionization ; Stepwise pyrolysis carbonization |
| Language | English |
| Dates of publication | 2023-0418 |
| Publishing place | Elsevier Inc. |
| Document type | Article ; Online |
| Note | Pre-press version |
| ZDB-ID | 241597-5 |
| ISSN | 1095-7103 ; 0021-9797 |
| ISSN (online) | 1095-7103 |
| ISSN | 0021-9797 |
| DOI | 10.1016/j.jcis.2023.04.058 |
| Database | NAL-Catalogue (AGRICOLA) |
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