Selective electrosorption of Ca2+ by MXene cathodes coupled with NiAl-LMO anodes through ion intercalation
文献类型：期刊论文
| 作者 | Sun, Jingqiu ; Mu, Qi; Wang, Tianyu; Qi, Jing; Hu, Chengzhi
|
| 刊名 | JOURNAL OF COLLOID AND INTERFACE SCIENCE
 |
| 出版日期 | 2021-05-15 |
| 卷号 | 590页码:539-547 |
| 关键词 | Calcium ion MXene Layered metal oxide Capacitive deionization Desalination |
| ISSN号 | 0021-9797 |
| 英文摘要 | Capacitive deionization (CDI), or electrosorption, is a desalination technology that exhibits significant potential; however, its major technical requirement of selective ion separation poses a challenge for its further practical application. Herein, a titanium carbide (MXene)-layered electrosorption electrode with high selectivity for Ca2+ was fabricated. The prepared MXene electrode had many surface hydroxyl functional groups that serve as adsorption sites for Ca2+. Ca2+ was successfully inserted into the interlayers of the MXene cathode and formed a strong interaction with [Ti-O] bonds during the capacitive deionization process. When a Ni-Al layered metal oxide anion intercalation electrode was employed as the counter electrode, Ca2+ adsorption by the MXene electrode was significantly enhanced due to the valence compensation balance effect. The maximum Ca2+ electrosorption capacity of the MXene electrode reached 1011.82 mg per gram effective MXene material, which is 6.3 times higher than that of Na+ based on the Langmuir adsorption isotherm model. The MXene electrode exhibited prominent selectivity for Ca2+ ions in the presence of Na+ and Mg2+. The Ca2+/Mg2+ selectivity factor for electrosorption reached 2.63, and Ca2+/Na+ selectivity factor could achieve 9.84, respectively. After five electrosorption/desorption cycles, the Ca2+ removal rate only decreased from 46.96% to 45.34%, suggesting that the MXene electrode has excellent stability. Our study demonstrated a novel CDI electrode and technical approach for softening water. (C) 2021 Elsevier Inc. All rights reserved. |
| WOS研究方向 | Chemistry, Physical |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/45996]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Ecoenvironm Sci Res Ctr, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China 3.Northeast Forestry Univ, Harbin 150040, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sun, Jingqiu,Mu, Qi,Wang, Tianyu,et al. Selective electrosorption of Ca2+ by MXene cathodes coupled with NiAl-LMO anodes through ion intercalation[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2021,590:539-547. |
| APA | Sun, Jingqiu,Mu, Qi,Wang, Tianyu,Qi, Jing,&Hu, Chengzhi.(2021).Selective electrosorption of Ca2+ by MXene cathodes coupled with NiAl-LMO anodes through ion intercalation.JOURNAL OF COLLOID AND INTERFACE SCIENCE,590,539-547. |
| MLA | Sun, Jingqiu,et al."Selective electrosorption of Ca2+ by MXene cathodes coupled with NiAl-LMO anodes through ion intercalation".JOURNAL OF COLLOID AND INTERFACE SCIENCE 590(2021):539-547. |
入库方式： OAI收割
来源：生态环境研究中心
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