High-Temperature Behavior and Surface Chemistry of Carbide MXenes Studied by Thermal Analysis

By M. Seredych, C. Shuck, David Pinto, Mohamed Alhabeb, Eliot Precetti, Grayson Deysher, B. Anasori, Narendra Kurra, Yury Gogotsi. Chemistry of Materials, 2019

422 citations recorded by the source corpus.

Two-dimensional (2D) transition-metal carbides and nitrides (MXenes) have attracted significant attention due to their electronic, electrochemical, chemical, and optical properties. However, understanding of their thermal stability is still lacking. To date, MXenes are synthesized via top-down wet chemical etching, which intrinsically results in surface terminations. Here, we provide detailed insight into the surface terminations of three carbide MXenes (Ti3C2Tx, Mo2CTx, and Nb2CTx) by performing thermal gravimetric analysis with mass spectrometry analysis (TA–MS) up to 1500 °C under a He atmosphere. This specific technique enables probing surface terminations including hydroxyl (−OH), oxy (═O), and fluoride (−F) and intercalated species, such as salts and structural water. The MXene hydrophilicity depends on the type of etching (hydrofluoric acid concentration and/or mixed acid composition) and subsequent delamination conditions. We show that the amount of structural water in Ti3C2Tx increases with decre...

Subfields: Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/157a96102125d10769cdd9341fe3baf78bbf678b

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In Materials Chemistry

  1. J. Rosen
  2. Armin VahidMohammadi
  3. Yury Gogotsi
  4. Michel W. Barsoum
  5. Husam N. Alshareef
  6. B. Anasori
  7. Chao Zhang
  8. Kanit Hantanasirisakul

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