Core–shell 2D nanoarchitectures: engineering N, P-doped graphitic carbon/MXene heterostructures for superior capacitive deionization

Ying Zhang; Haolin Li; Qian Yang; Shuaihua Zhang; Bin Zhao; Jingyu Wu; Ningzhao Shang; Xiaoxian Zhao; Zhichang Xiao; Xiaohuan Zang; Jeonghun Kim; Xingtao Xu; Yusuke Yamauchi

doi:10.1039/D3TA00696D

Core–shell 2D nanoarchitectures: engineering N, P-doped graphitic carbon/MXene heterostructures for superior capacitive deionization†

Ying Zhang,^a Haolin Li,^a Qian Yang,^b Shuaihua Zhang,

*^a Bin Zhao,^a Jingyu Wu,^a Ningzhao Shang,

^a Xiaoxian Zhao,

^a Zhichang Xiao,^a Xiaohuan Zang,^a Jeonghun Kim,

^c Xingtao Xu*^df and Yusuke Yamauchi

*^cef

Author affiliations

* Corresponding authors

^a Department of Chemistry, College of Science and Hebei Key Laboratory of Analysis and Control of Zoonotic Pathogenic Microorganism, Hebei Agricultural University, Baoding 071001, Hebei, China
E-mail: zhangshuaihua@hebau.edu.cn

^b College of Public Health, Hebei University, Baoding 071002, Hebei, China

^c Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, South Korea

^d Marine Science and Technology College, Zhejiang Ocean University, Zhoushan 316022, Zhejiang, China
E-mail: xingtao.xu@zjou.edu.cn

^e Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane 4072, Queensland, Australia
E-mail: y.yamauchi@uq.edu.au

^f Department of Materials Process Engineering, Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
E-mail: y.yamauchi@nagoya-u.jp

Abstract

Engineering MXene-based 2D heterostructures is a hot research topic for capacitive deionization (CDI) materials. Herein, MXene nanosheets were ingeniously integrated with metal–organic framework (MOF)-derived carbons to generate the N, P-doped graphitic carbon/Ti₃C₂T_x MXene heterostructures (N, P-GC/MXene). The ZIF-67/MXene precursors were synthesized through in situ nucleation of ZIF-67 dodecahedra onto the MXene nanosheets, followed by thermal carbonization and phosphatization to prepare N, P-GC/MXene, which was composed of homogeneously distributed heteroatoms (N and P) in the carbon frameworks. By virtue of structural characteristics, high electrochemical conductivity, and pseudocapacitive contributions, the N, P-GC/MXene electrodes exhibited a superior salt adsorption capacity of 55.3 mg g⁻¹, rapid removal rate, and excellent cycling stability. This work demonstrates the potential of MXene-based heterostructures for CDI materials and propels the development of the CDI technique.

Journal of Materials Chemistry A

Core–shell 2D nanoarchitectures: engineering N, P-doped graphitic carbon/MXene heterostructures for superior capacitive deionization†

Abstract

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Core–shell 2D nanoarchitectures: engineering N, P-doped graphitic carbon/MXene heterostructures for superior capacitive deionization

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