Thermal stability of C-F/C(-F) bonds in fluorinated graphene detected by heating infrared spectroscopy

• Published in: Physical chemistry chemical physics : PCCP 2021-12, Vol.23 (47), p.26853-26863
• Main Authors: Li, Yulong, Cheng, Jingliang, Wang, Xu, Liu, Yang, Liu, Xiangyang
• Format: Article
• ISSN: 1463-9076; 1463-9084
• DOI: 10.1039/d1cp04472a

The thermal stability of fluorinated graphene (FG) plays an important role in its application and research, and thus it is necessary to conduct in-depth research on the thermal stability of the C-F bond in FG. Herein, FG with different types and distributions of C-F/C(-F) 2 bonds were synthesized, and the correlation between the C-F/C(-F) 2 bonds and thermal stability of these FG samples was monitored via in situ heating infrared spectroscopy ( in situ FTIR). The stability of the different types and distributions of C-F/C(-F) 2 bonds in FG and the temperatures at which these C-F/C(-F) 2 bonds were eliminated were determined. In terms of C-F bonds in FG, the most stable type is that in C(-F) 2 of perfluorinated FG, followed by the C-F bonds in perfluorinated FG. The thermal stability of isolated C-F bonds and C(-F) 2 bonds adjacent to the conjugated structure was the worst, which would be detached from FG at low temperature (≤82 °C). Furthermore, the evolution of the conjugated structures in FG during thermal annealing was also affected by the type and distribution of the C-F bonds. Fluorinated graphene (FG) with different types and distributions of C-F/C(-F) 2 bonds was synthesized, and the correlation between the C-F/C(-F) 2 bonds and thermal stability was monitored via in situ heating infrared spectroscopy.