Biobased polyporphyrin derived porous carbon electrodes for highly efficient capacitive deionization. (March 2022)

• Record Type: Journal Article
• Authors: Zhang, Wei; Jin, Can; Shi, Zhenyu; Zhu, Liang; Chen, Lin; Liu, Yunlong; Zhang, Hao
• Is Part Of: Chemosphere. Volume 291:Part 3(2022)
• Publication Date: 2022-03
• Subjects: Biobased polyporphyrin -- Porous carbon -- Nitrogen doping -- Capacitive deionization -- Electrosorption; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2021.133113
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: Recently, capacitive deionization (CDI) has attracted considerable interest as a potential desalination technique for seawater. It is thus desirable to develop low-cost, sustainable, and efficient electrode materials for desalination. In this study, the polyporphyrin was prepared by a one-pot reaction from biobased furan derivative, followed by activation to manufacture nitrogen-doped polyporphyrin derived porous carbons (NPPCs) for efficient capacitive deionization. In the presence of KOH as a pore activator, NPPCs exhibited cross-linked interconnected nanosphere chain-like structures inherited from the polyporphyrin backbone with coexisting mesopores and micropores, leading to extremely high specific surface area (2979.3 m 2 g −1 ) and large pore volume (2.22 cm 3 g −1 ). The electrochemical measurements revealed good conductivity, outstanding stability, and extraordinary specific capacitance (328.7 F g −1 ) of NPPCs, which can be ascribed to rich nitrogen content (8.0 at%) and high Pyrrolic nitrogen ratio. Due to their superior hierarchical porous structure and excellent electrochemical performance, the NPPC-800 electrodes presented a high salt adsorption capacity (SAC) of 35.7 mg g −1 and outstanding cycling stability in 10 mM NaCl solution at 1.2 V during the desalination tests. This work demonstrates the utilization of biobased porous carbon material will pave a prospective way in sustainable and potential applications for CDI technique. Graphical abstract: Image 1 Highlights: Nitrogen-doped porous carbons were fabricated from biobased polyporphyrin. NPPCs exhibited high specific surface areas, large pore volumes and sufficient N content. NPPCs showed excellent electrochemical specific capacitance up to 328.7 F g −1 . NPPCs electrodes enabled high salt adsorption capacity and stable desalination recyclability.