From aesthetics to safety: dyeing of graphene oxide films based on silica nanoparticles and the application in fire warning

Graphene oxide (GO) has prevented its widespread application due to its inherent black color and flammability. In this article, GO were physically colored using structural colors to prepare GO-SINP films. With the physical isolation effect of SiO2 and the thermoelectric effect of GO, GO was endowed with fire warning properties. Spraying SiO2 with different particle sizes on the surface of GO film can result in red, blue, and green colors. And GO-SINP film has excellent fire alarm performance, with response time and duration of 1 s and 157.34 s respectively, providing effective early warning in the early stages of fire. This work provides a new approach for intelligent fire-warning functional materials.