Ultrafast Synthesis of MXenes in Minutes via Low‐Temperature Molten Salt Etching

Abstract Developing green and efficient preparation strategies is a persistent pursuit in the field of 2D transition metal nitrides and/or carbides (MXenes). Traditional etching methods, such as HF‐based or high‐temperature Lewis‐acid‐molten‐salt etching route, require harsher etching conditions and exhibit lower preparation efficiency with limited scalability, severely constraining their commercial production and practical application. Here, an ultrafast low‐temperature molten salt (LTMS) etching method is presented for the large‐scale synthesis of diverse MXenes within minutes by employing NH 4 HF 2 as the etchant. The increased thermal motion and improved diffusion of molten NH 4 HF 2 molecules…

• NN
  National Natural Science Foundation of China

  Award: 52372228
• SP
  Sichuan Province Science and Technology Support Program

  Award: 2022YFG0293