锰
超级电容器
铷
吸附
假电容器
无机化学
电化学
氧化物
分子筛
材料科学
水溶液
电极
电容去离子
化学
化学工程
钾
有机化学
冶金
物理化学
工程类
作者
Xiaohui Wang,Xue Wang,Yali Wang,Quan‐Guo Zhai,Yucheng Jiang,Shu-Ni Li
标识
DOI:10.1016/j.seppur.2022.120635
摘要
Octahedral molecular sieve – 5 (OMS-5), a typical 2 × 4 tunnel manganese oxide, is considered as an adsorbent for rubidium ion (Rb+) because of its specific tunnel structure. Also, manganese oxide-based nanomaterials are also widely used in supercapacitor energy storage and capacitor deionization electrodes due to their high specific capacitance. In this work, a series of protonated OMS-5 (H-OMS-5, H-Co-OMS-5, and H-Ni-OMS-5) nanobelts are synthesized and used as electrode materials for electrochemical enrichment of Rb+ in aqueous solution. The specific capacity values for H-OMS-5, H-Co-OMS-5, and H-Ni-OMS-5 at 1 A·g−1 are of 159, 168, and 215 F·g−1, respectively. Thanks to the unique protonated 2 × 4 tunnel structure, well regulating surface area, and excellent specific capacitance, the maximum Rb+ adsorption capacities of H-OMS-5, H-Co-OMS-5, and H-Ni-OMS-5 can reach to 390.3, 405.7, and 481.7 mg·g−1, respectively. These results indicate that the protonated 2 × 4 tunnel manganese dioxide nanobelts are of great potentials as faradaic electrode materials for selective rubidium ion enrichment applications.
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