Low-temperature and efficient preparation of starfish-like Mo2C/C composites from waste biomass

作者：Wang, Jintao; Kan, Xiaoqing; Liu, Zhenglong; Yu, Chao; Deng, Chengji; Zhu, Hongxi; Ding, Jun^*; Qian, Feng^*

来源：Journal of Physics and Chemistry of Solids, 2023, 181: 111522.

DOI：10.1016/j.jpcs.2023.111522

• Biomass carbon
• Molten-salt
• Biomorphic ceramic

In this study, starfish-like Mo2C/C biomass ceramic composites were successfully prepared using waste pine as a C template precursor through rapid heat and mass transfer in a molten salt environment. The effects of the reaction temperature and molten salt on the formation of the Mo2C/C ceramic composites were investigated. The mechanism involved in the preparation of Mo2C/C ceramic composites in a molten salt liquid environment was determined. The results showed that the mixed molten salt environment comprising KF/KCl with a low KF content could promote the formation of Mo2C. The mixed molten salt environment was beneficial for the formation of regular Mo2C flakes, which interwove together to form a "starfish-like" shape as the reaction temperature increased to significantly increase the proportion of micropores and specific surface area of the composites. In addition, the formation of Mo2C in the C template occurred in two steps, where Mo first reacted with C to form MoC and the liquid Mo then reacted with MoC to form Mo2C.