Core–shell hybrid zeolitic imidazolate framework-derived hierarchical carbon for capacitive deionization. Issue 29 (15th July 2020)

• Record Type: Journal Article
• Authors: Zhang, Wuxiang; Arramel, Arramel; Wong, Ping Kwan Johnny; Zhang, Lei; Zheng, Jianzhong; Zhang, Wen; Zhang, Hao; Yan, Xin; Qi, Junwen; Li, Jiansheng
• Is Part Of: Journal of materials chemistry. Volume 8:Issue 29(2020)
• Page Start: 14653
• Page End: 14660
• Publication Date: 2020-07-15
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d0ta05709f
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : We introduce a viable strategy for the fabrication of core–shell ZIF-8@PVP–PDA/Zn by in situ 2-methylimidazole-assisted dopamine self-polymerization. Abstract : We introduce a viable strategy for the fabrication of core–shell ZIF-8@PVP–PDA/Zn by in situ 2-methylimidazole-assisted dopamine self-polymerization. The role of polyvinyl pyrrolidone (PVP) and 2-methylimidazole (2-MI) towards ZIF-8@PVP–PDA/Zn formation is systematically demonstrated. In particular, 2-MI not only is employed as the organic ligand for ZIF-8 but also provides an alkaline environment for the polymerization of dopamine. Moreover, it also protects the ZIF-8 structure from etching. After pyrolysis, the ZIF-8@PVP–PDA/Zn is converted into ant-nest-like hierarchical carbon (ANHC), which has a wide pore distribution, high pore volume (2.35 cm 3 g −1 ) and high nitrogen (7.12%) content. Superior capacitive deionization (CDI) performance (25.4 mg g −1 ) and stable electrosorption cycles of ANHC are achieved, which demonstrates its potential for CDI applications.