Improving the temperature sensitivity of graphene oxide-based fire alarms using graphene oxide precursors with thermally labile oxygenated groups

作者：Zhu, Yanbin; Kong, Gang; Che, Chunshan^*

来源：Journal of Materials Science, 2023, 58(31): 12611-12623.

DOI：10.1007/s10853-023-08832-6

• RESISTANCE TRANSITION
• OXIDATION
• GRAPHITE
• SPONGE

Graphene oxide-based fire alarm sensors have received the most extensive research. Various organic and inorganic flame retardants and reducing agents as well as conductive fillers have been used to improve the temperature sensitivity of graphene oxide-based fire sensors. However, the effect of graphene oxide (GO) itself has sometimes been neglected by many researchers, since the synthesis of different structures of GO has received little attention. Here, we prepared two sensors, including the fire alarm based on GO synthesized at low temperatures (LGO) and the fire alarm based on GO synthesized by the conventional Hummers method (HGO). Compared with the HGO-based fire alarms, the improved temperature sensitivity of the LGO-based fire alarms is mainly due to the lower thermal decomposition temperature of the oxygen-containing functional groups in the LGO sheets. Interestingly, the LGO-based fire alarm has a response time of similar to 148 s at 150 degrees C, while the HGO does not respond. This finding will provide new ideas for the design of advanced GO-based fire alarm sensors. @@@ [GRAPHICS] @@@ .