Journal article
Edge Capping of 2D‐MXene Sheets with Polyanionic Salts To Mitigate Oxidation in Aqueous Colloidal Suspensions
Angewandte Chemie (International ed.), v 58(36), pp 12655-12660
02 Sep 2019
PMID: 31293049
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
MXenes have shown promise in myriad applications, such as energy storage, catalysis, EMI shielding, among many others. However, MXene oxidation in aqueous colloidal suspensions when stored in water at ambient conditions remains a challenge. It is now shown that by simply capping the edges of individual MXene flakes, Ti3C2Tz and V2CTz, by polyanions such as polyphosphates, polysilicates or polyborates, it is possible to quite significantly reduce their propensity for oxidation even when held in aerated water for weeks. This breakthrough resulted from the realization that the edges of MXene sheets are positively charged. It is thus an example of selectively functionalizing the edges differently from the MXene sheet surfaces.
Stability by capping: MXenes generally tend to oxidize when stored as a colloid in water at ambient conditions. Capping the edges of individual MXene flakes by polyanions, however, significantly decreases the rate of oxidation, and makes long‐term storage of MXene possible. This is important because it renders solution processing of MXenes scalable and facile.
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Details
- Title
- Edge Capping of 2D‐MXene Sheets with Polyanionic Salts To Mitigate Oxidation in Aqueous Colloidal Suspensions
- Creators
- Varun Natu - Drexel UniversityJames L. Hart - Drexel UniversityMaxim Sokol - Drexel UniversityHelen Chiang - Drexel UniversityMitra L. Taheri - Drexel UniversityMichel W. Barsoum - Drexel University
- Publication Details
- Angewandte Chemie (International ed.), v 58(36), pp 12655-12660
- Publisher
- Wiley
- Number of pages
- 6
- Grant note
- DMR (1740795; 1429661)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000483173300001
- Scopus ID
- 2-s2.0-85071238908
- Other Identifier
- 991019168536204721
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Highly Cited Paper
- Web of Science research areas
- Chemistry, Multidisciplinary