School of Environmental and Material Engineering, Yantai University, Yantai 264005, China.
School of Environmental and Material Engineering, Yantai University, Yantai 264005, China.
J Environ Sci (China). 2025 Mar;149:254-267. doi: 10.1016/j.jes.2023.12.024. Epub 2023 Dec 30.
As a new electrochemical technology, capacitive deionization (CDI) has been increasingly applied in environmental water treatment and seawater desalination. In this study, functional groups modified porous hollow carbon (HC) were synthesized as CDI electrode material for removing Na and Cl in salty water. Results showed that the average diameter of HC was approximately 180 nm, and the infrared spectrum showed that its surface was successfully modified with sulfonic and amino groups, respectively. The sulfonic acid functionalized HC (HC-S) showed better electrochemical and desalting performance than the amino-functionalized HC (HCN), with a maximum Faradic capacity of 287.4 F/g and an adsorptive capacity of 112.97 mg/g for NaCl. Additionally, 92.63% capacity retention after 100 adsorption/desorption cycles demonstrates the excellent stability of HC-S. The main findings prove that HC-S is viable as an electrode material for desalination by high-performance CDI applications.
作为一种新兴的电化学技术，电容去离子（CDI）技术越来越多地应用于环境水处理和海水淡化。本研究以功能化多孔空心碳（HC）为电极材料，通过引入磺酸基和氨基官能团，制备了用于去除盐水中 Na 和 Cl 的 CDI 电极材料。结果表明，HC 的平均粒径约为 180nm，红外光谱显示其表面成功地进行了磺酸基和氨基官能团的修饰。与氨基功能化 HC（HCN）相比，磺酸基功能化 HC（HC-S）具有更好的电化学和脱盐性能，其最大法拉第容量为 287.4F/g，对 NaCl 的吸附容量为 112.97mg/g。此外，经过 100 次吸附/脱附循环后，容量保持率仍高达 92.63%，表明 HC-S 具有优异的稳定性。这些主要发现证明了 HC-S 作为高性能 CDI 应用的脱盐电极材料的可行性。
