Citation: Jun Huang, Pengfei Nie, Yongchao Lu, Jiayang Li, Yiwen Wang, Jianyun Liu. 丝光沸石负载自支撑氮掺杂多孔碳纳米纤维电容器及高效选择性去除硬度离子[J]. Acta Physico-Chimica Sinica, ;2025, 41(7): 100066. doi: 10.1016/j.actphy.2025.100066 shu

丝光沸石负载自支撑氮掺杂多孔碳纳米纤维电容器及高效选择性去除硬度离子

1.
College of Environmental Science and Engineering, Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, Donghua University, Shanghai 201620, China;
2.
School of Civil Engineering, Kashi University, Kashi 844000, Xinjiang Uygur Autonomous Region, China;
3.
College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China

Received Date: 18 December 2024
Revised Date: 25 January 2025
Accepted Date: 12 February 2025

Fund Project: The project was supported by the National Natural Science Foundation of China (21776045) and the Natural Science Foundation of Shanghai (23ZR1401200).

电容去离子(CDI)是一种具有广阔前景的电脱盐技术。通过引入成本低、无毒的电极材料，CDI在水体硬度离子的选择性去除方面呈现显著优势。丝光沸石(MOR)是天然的、环保型离子交换材料。本研究通过静电纺丝法，将MOR有效嵌入纳米纤维，随后进行炭化处理得到丝光沸石负载氮掺杂碳纳米纤维(MOR@N-CNF)。研究证实了MOR在碳纳米纤维基体中均匀分布。MOR@N-CNF表现出增强的亲水性的高的比表面积。而且纤维柔性好、导电性高，作为自支撑电极在CaCl₂溶液中，呈现高的电化学比电容(162.7 F·g^-1)。直接用于CDI阴极与活性炭(AC)阳极构成非对称CDI系统，进行选择性硬度离子吸附。MOR@N-CNF阴极对Mg²⁺和Ca²⁺的吸附容量分别为1501和1416 μmol·g^-1，且对这两种离子的选择性远高于Na⁺ (对Ca²⁺的选择性系数为9.7，对Mg²⁺的选择性系数为8.9)。经过40次循环测试后，该电极保留了78%的吸附能力，展现出优异的循环稳定性。本研究不仅为离子交换型复合电极材料的制备提供了新思路，也进一步凸显了CDI技术在硬水软化领域的潜力。
- Self-supporting,
- Carbon nanofiber,
- Capacitive deionization,
- Selective adsorption,
- Hardness ion
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沈阳化工大学材料科学与工程学院沈阳 110142