Carbothermal Diffusion Reaction Synthesis of CrN/carbon Nanofiber for Efficient Electrosorption of Fluoride Ions from Water

IF 17.2 1区 工程技术 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Xuran Yang, Hao Zhang, Jiamin Gao, Yiyuan Yao, Yujun Zhou, Junwen Qi, Yue Yang, Zhigao Zhu, Jiansheng Li
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Abstract

Development of novel electrode materials with the integration of structural and compositional merits can essentially improve the electrosorption performance. Herein, we demonstrate a new strategy, named as carbothermal diffusion reaction synthesis (CDRS), to fabricate binder-free CrN/carbon nanofiber electrodes for efficient electrosorption of fluoride ions from water. The CDRS strategy involves electrospinning MIL-101(Cr) particles with polyacrylonitrile (PAN) to form one-dimensional nanofiber, followed by spatial-confined pyrolysis process in which the nitridation reaction occurred between nitrogen element from PAN and chromium element from MIL-101(Cr), resulting macroscopic, free-standing electrodes with well dispersed ultrafine CrN nanoparticles on porous nitrogen enriched carbon matrix. As expected, the F adsorption capacity reached 47.67 mg g−1 and there was no decrease in F removal after 70 adsorption regenerations in 50 mg L−1 F solution at 1.2 V. The adsorption mechanism of F was explored by X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT). The enhanced F adsorption capacity was achieved by the reversible Cr4+/Cr3+ redox pair provided by CrN and the electrical double layer capacitance produced by carbon skeleton. This study provides guidance on synergistic modulation of shaping and composition optimization of novel functional materials for electrosorption, catalysis, and supercapacitor applications.

Graphical abstract

Abstract Image

碳热扩散反应合成用于高效电吸附水中氟离子的 CrN/碳纳米纤维
开发集结构和成分优点于一体的新型电极材料可以从根本上提高电吸附性能。在此,我们展示了一种名为 "碳热扩散反应合成(CDRS)"的新策略,用于制造无粘结剂的 CrN/碳纳米纤维电极,以高效电吸附水中的氟离子。CDRS 策略包括将 MIL-101(Cr)颗粒与聚丙烯腈(PAN)电纺丝形成一维纳米纤维,然后进行空间限制热解过程,在此过程中,PAN 中的氮元素与 MIL-101(Cr)中的铬元素发生氮化反应,从而在多孔富氮碳基体上形成宏观、独立的超细 CrN 纳米颗粒电极。通过 X 射线光电子能谱(XPS)和密度泛函理论(DFT)探讨了 F- 的吸附机理。CrN提供的可逆Cr4+/Cr3+氧化还原对和碳骨架产生的双电层电容增强了F-的吸附能力。这项研究为新型功能材料在电吸附、催化和超级电容器应用中的协同调制成型和成分优化提供了指导。 图文摘要
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来源期刊
CiteScore
18.70
自引率
11.20%
发文量
109
期刊介绍: Advanced Fiber Materials is a hybrid, peer-reviewed, international and interdisciplinary research journal which aims to publish the most important papers in fibers and fiber-related devices as well as their applications.Indexed by SCIE, EI, Scopus et al. Publishing on fiber or fiber-related materials, technology, engineering and application.
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