孔结构调制和B,N共掺杂相结合增强生物质碳的电容去离子

IF 10.7 1区 工程技术 Q1 CHEMISTRY, PHYSICAL
Yao Qiu , Chunjie Zhang , Rui Zhang , Zhiyuan Liu , Huazeng Yang , Shuai Qi , Yongzhao Hou , Guangwu Wen , Jilei Liu , Dong Wang
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引用次数: 1

摘要

生物质衍生碳由于具有良好的导电性、易获得性和固有的孔/通道,已显示出作为电容去离子(CDI)的先进电极的巨大潜力。然而,传统的生物质简单热解总是产生表面积有限的孔隙率不足。此外,生物质衍生的碳还存在润湿性差和离子单一物理吸附的问题,导致脱盐性能有限。本文将孔结构优化和元素共掺杂结合到香蕉皮(BP)衍生的碳上,构建了具有大离子可及表面积的分级多孔和B,N共掺杂碳。提出了一种独特的膨胀活化(EA)策略来调节碳的孔隙率和比表面积。此外,B,N共掺杂可以增加离子的可及位点,提高亲水性,并促进离子的吸附。得益于分级孔隙率和B,N共掺杂的协同作用,所得电极对NaCl表现出增强的CDI性能,具有大的脱盐能力(29.5 mg g−1)、高的盐吸附速率(6.2 mg g−1min−1)和对其他盐的多功能吸附能力。密度泛函理论揭示了孔和B,N共掺杂增强去离子的机理。这项工作提出了一种简单的EA策略来调节生物质衍生碳的孔结构,并展示了整合孔和杂原子掺杂构建高性能CDI电极的巨大潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Integration of pore structure modulation and B, N co-doping for enhanced capacitance deionization of biomass-derived carbon

Integration of pore structure modulation and B, N co-doping for enhanced capacitance deionization of biomass-derived carbon

Biomass-derived carbon has demonstrated great potentials as advanced electrode for capacitive deionization (CDI), owing to good electroconductivity, easy availability, intrinsic pores/channels. However, conventional simple pyrolysis of biomass always generates inadequate porosity with limited surface area. Moreover, biomass-derived carbon also suffers from poor wettability and single physical adsorption of ions, resulting in limited desalination performance. Herein, pore structure optimization and element co-doping are integrated on banana peels (BP)-derived carbon to construct hierarchically porous and B, N co-doped carbon with large ions-accessible surface area. A unique expansion-activation (EA) strategy is proposed to modulate the porosity and specific surface area of carbon. Furthermore, B, N co-doping could increase the ions-accessible sites with improved hydrophilicity, and promote ions adsorption. Benefitting from the synergistic effect of hierarchical porosity and B, N co-doping, the resultant electrode manifest enhanced CDI performance for NaCl with large desalination capacity (29.5 mg g−1), high salt adsorption rate (6.2 mg g−1 min−1), and versatile adsorption ability for other salts. Density functional theory reveals the enhanced deionization mechanism by pore and B, N co-doping. This work proposes a facile EA strategy for pore structure modulation of biomass-derived carbon, and demonstrates great potentials of integrating pore and heteroatoms-doping on constructing high-performance CDI electrode.

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来源期刊
Green Energy & Environment
Green Energy & Environment Energy-Renewable Energy, Sustainability and the Environment
CiteScore
16.80
自引率
3.80%
发文量
332
审稿时长
12 days
期刊介绍: Green Energy & Environment (GEE) is an internationally recognized journal that undergoes a rigorous peer-review process. It focuses on interdisciplinary research related to green energy and the environment, covering a wide range of topics including biofuel and bioenergy, energy storage and networks, catalysis for sustainable processes, and materials for energy and the environment. GEE has a broad scope and encourages the submission of original and innovative research in both fundamental and engineering fields. Additionally, GEE serves as a platform for discussions, summaries, reviews, and previews of the impact of green energy on the eco-environment.
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