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Time-Dependent Cation Selectivity of Titanium Carbide MXene in Aqueous Solution

Title data

Wang, Lei ; Torkamanzadeh, Mohammad ; Majed, Ahmad ; Zhang, Yuan ; Wang, Qingsong ; Breitung, Ben ; Feng, Guang ; Naguib, Michael ; Presser, Volker:
Time-Dependent Cation Selectivity of Titanium Carbide MXene in Aqueous Solution.
In: Advanced Sustainable Systems. Vol. 6 (2022) Issue 3 . - No. 2100383.
ISSN 2366-7486
DOI: https://doi.org/10.1002/adsu.202100383

Official URL: Volltext

Project information

Project title:
Project's official titleProject's id
Nachwuchsgruppe Lehrstuhl für Anorganische Aktivmaterialien electrochemischer Speicher Dr. Qingsong WangNo information

Abstract in another language

Abstract Electrochemical ion separation is a promising technology to recover valuable ionic species from water. Pseudocapacitive materials, especially 2D materials, are up-and-coming electrodes for electrochemical ion separation. For implementation, it is essential to understand the interplay of the intrinsic preference of a specific ion (by charge/size), kinetic ion preference (by mobility), and crystal structure changes. Ti3C2Tz MXene is chosen here to investigate its selective behavior toward alkali and alkaline earth cations. Utilizing an online inductively coupled plasma system, it is found that Ti3C2Tz shows a time-dependent selectivity feature. In the early stage of charging (up to about 50 min), K+ is preferred, while ultimately Ca2+ and Mg2+ uptake dominate; this unique phenomenon is related to dehydration energy barriers and the ion exchange effect between divalent and monovalent cations. Given the wide variety of MXenes, this work opens the door to a new avenue where selective ion-separation with MXene can be further engineered and optimized.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: electrochemistry; ion selectivity; ion-exchange; MXene
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Lehrstuhl Anorganische Aktivmaterialien für elektrochemische Energiespeicher
Research Institutions > Research Centres > Bayerisches Zentrum für Batterietechnik - BayBatt
Result of work at the UBT: No
DDC Subjects: 500 Science > 500 Natural sciences
500 Science > 540 Chemistry
600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 02 Nov 2022 08:43
Last Modified: 02 Nov 2022 08:43
URI: https://eref.uni-bayreuth.de/id/eprint/72589