Journal article
Synthesis of Chlorine‐Terminated MXenes by Dry Selective Extraction with TiCl4
Angewandte Chemie, v 138(3), e15780
16 Jan 2026
Abstract
Despite rapid research progress in the field of MXenes over the past decade, this new family of nanomaterials still faces challenges in terms of scalable manufacturing and control over surface chemistry, which determines many of their physicochemical properties. This work demonstrates titanium tetrachloride (TiCl4) as a new type of gas‐phase etchant for the dry selective extraction of the A‐element (Al) from MAX phases, providing MXenes with uniform chlorine surface terminations. Our approach eliminates the need for extensive washing, which is required in the cases of wet‐chemical and molten salt etching. Computational data suggest that TiCl4 reacts with the MAX phases directly to extract AlCl3 rather than forming any intermediate phases. One of the resulting MXenes, Ti3C2Cl2, was then delaminated into few‐layer flakes by intercalating lithium ions from an organic solvent. Some of the hydrophobic delaminated flakes were discovered to roll into a tubular shape, forming 1‐dimensional nanoscrolls. Our dry etching process provides opportunities for the scalable synthesis of halogen‐terminated Ti‐ and Nb‐based MXenes with two to four M‐element layers and controlled surface chemistry. Titanium tetrachloride is demonstrated as a new gas‐phase etchant to fabricate several different chlorine‐terminated MXenes from their parent MAX phases in a completely dry process. The MXene structures are analyzed, and the experimental results are corroborated by computational analysis. Ti3C2Cl2 MXene is then delaminated using Li intercalant in organic solvents and subjected to further characterization.
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Details
- Title
- Synthesis of Chlorine‐Terminated MXenes by Dry Selective Extraction with TiCl4
- Creators
- Benjamin Davis - Drexel UniversityDmitri LaBelle - Drexel UniversityHyunho Kim - Drexel UniversityTeng Zhang - Drexel UniversityTetiana Parker - Drexel UniversityStefano Ippolito - Drexel UniversityKateryna Shevchuk - Drexel UniversityJongyoun Kim - Drexel UniversityGeetha Valurouthu - Drexel UniversityYong‐Jie Hu - Drexel UniversityYury Gogotsi (Corresponding Author) - Drexel University
- Publication Details
- Angewandte Chemie, v 138(3), e15780
- Publisher
- Wiley
- Number of pages
- 10
- Grant note
- National Science Foundation (DMR‐2334275) Air Force Research Laboratory (FA2394‐23‐C‐B022)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering; Chemical and Biological Engineering; A.J. Drexel Nanomaterials Institute
- Other Identifier
- 991022153555104721