Yanan Wang , Liuqian Yang , Dandan Ouyang , Dongxu Chen , Hui Zhu , Jiao Yin
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Combining structure design and surface modulation, these freestanding HCFs present enhanced desalination rate and stability, in which the hierarchal vasculature facilitates electron/ion transport, and the functionalized surface suppresses the side reactions. Impressively, when HCF-Asp and HCF-Arg serve as cathode and anode respectively, the asymmetric CDI device provides an excellent salt adsorption capacity of 45.6 mg g</span></span><sup>−1</sup><span>, a fast salt adsorption rate of 14.0 mg g</span><sup>−1</sup> min<sup>−1</sup><span> and a superior cycling stability up to 80 cycles. In short, this work evidenced an integrated strategy to exploiting carbon materials with outstanding capacity and stability for high-performance capacitive deionization.</span></p></div>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":null,"pages":null},"PeriodicalIF":9.4000,"publicationDate":"2023-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":"{\"title\":\"Amino acids functionalized vascular-like carbon fibers for efficient capacitive deionization\",\"authors\":\"Yanan Wang , Liuqian Yang , Dandan Ouyang , Dongxu Chen , Hui Zhu , Jiao Yin\",\"doi\":\"10.1016/j.jcis.2023.06.069\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p><span><span><span>Porous carbons have attracted great attention in capacitive </span>deionization<span><span> (CDI), benefiting from their high surface areas and abundant adsorption sites. 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引用次数: 2
摘要
多孔碳因其高比表面积和丰富的吸附位点而在电容去离子(CDI)中受到广泛关注。然而,碳的吸附速率缓慢和循环稳定性差仍然是人们关注的问题,这是由离子可达网络不足和副反应(共离子排斥和氧化腐蚀)引起的。本文以生物血管为灵感,采用模板辅助同轴静电纺丝的方法成功合成了介孔中空碳纤维(HCF)。随后,HCF的表面电荷被各种氨基酸(精氨酸(HCF- arg)和天冬氨酸(HCF- asp))修饰。结合结构设计和表面调制,这些独立的HCFs具有更高的脱盐速率和稳定性,其中层次化的脉管系统促进了电子/离子的传递,而功能化的表面抑制了副反应。令人印象深刻的是,当HCF-Asp和HCF-Arg分别作为阴极和阳极时,不对称CDI装置具有45.6 mg g - 1的优异盐吸附容量,14.0 mg g - 1 min - 1的快速盐吸附速率和高达80次循环的优异循环稳定性。简而言之,这项工作证明了一种开发具有卓越容量和稳定性的碳材料用于高性能电容去离子的综合策略。
Amino acids functionalized vascular-like carbon fibers for efficient capacitive deionization
Porous carbons have attracted great attention in capacitive deionization (CDI), benefiting from their high surface areas and abundant adsorption sites. However, the sluggish adsorption rate and poor cycling stability of carbons are still concerns, which are caused by the insufficient ion-accessible networks and the side reactions (the co-ion repulsion and oxidative corrosion). Herein, inspired by the blood vessels in organisms, mesoporous hollow carbon fibers (HCF) were successfully synthesized via a template assisted coaxial electrospinning strategy. Subsequently, the surface charge of HCF was modified by various amino acids (arginine (HCF-Arg) and aspartic acid (HCF-Asp)). Combining structure design and surface modulation, these freestanding HCFs present enhanced desalination rate and stability, in which the hierarchal vasculature facilitates electron/ion transport, and the functionalized surface suppresses the side reactions. Impressively, when HCF-Asp and HCF-Arg serve as cathode and anode respectively, the asymmetric CDI device provides an excellent salt adsorption capacity of 45.6 mg g−1, a fast salt adsorption rate of 14.0 mg g−1 min−1 and a superior cycling stability up to 80 cycles. In short, this work evidenced an integrated strategy to exploiting carbon materials with outstanding capacity and stability for high-performance capacitive deionization.
期刊介绍:
The Journal of Colloid and Interface Science publishes original research findings on the fundamental principles of colloid and interface science, as well as innovative applications in various fields. The criteria for publication include impact, quality, novelty, and originality.
Emphasis:
The journal emphasizes fundamental scientific innovation within the following categories:
A.Colloidal Materials and Nanomaterials
B.Soft Colloidal and Self-Assembly Systems
C.Adsorption, Catalysis, and Electrochemistry
D.Interfacial Processes, Capillarity, and Wetting
E.Biomaterials and Nanomedicine
F.Energy Conversion and Storage, and Environmental Technologies