A simple method for the synthesis of nanosized Ti3AlC2 powder in NaCl–KCl molten salt

摘要

Herein we report, a simple novel method to synthesize nanosized Ti_(3)AlC_(2) powder from Ti, Al, and C powders in NaCl–KCl molten salt. It is more conducive to the formation of Ti_(3)AlC_(2) at higher salt/precursor materials ratio and particle size of Ti_(3)AlC_(2) powder dramatically decreases with increasing mass ratio of the salt to precursor materials. Fine-grained Ti_(3)AlC_(2) powder is successfully synthesized at 950~(○)C for 5?h or at 1000~(○)C for 2?h with a salt/precursor materials ratio of 10:1. Ti_(3)C_(2) MXene is also prepared by etching fine-grained Ti_(3)AlC_(2) precursor in HF solution at 60°C for 2?h.