Nacre-biomimetic graphene oxide paper intercalated by phytic acid and its ultrafast fire-alarm application

Autor: Weikang Sun, Guibin Shi, Sheng Shang, Chuyuan Huang, Gongqing Chen, Xianfeng Chen, Hongji Tao, Bihe Yuan, Yong Wang, Jing Liu, Pan Yang
Rok vydání: 2020
Předmět:
Zdroj: Journal of Colloid and Interface Science. 578:412-421
ISSN: 0021-9797
DOI: 10.1016/j.jcis.2020.05.112
Popis: A novel nacre-like flame-retardant paper based on graphene oxide (GO), and phytic acid (PTA) is fabricated via evaporation-induced self-assembly. This facile method is time saving and low energy consuming. A facile approach is proposed to improve thermal oxidative stability of GO paper by in situ phosphorus doping during flame exposure. Then fire-alarm system is designed based on the high-temperature thermal reduction characteristic of GO. The GO paper functionalized with PTA (GO-PTA) can provide ultrasensitive, reliable and longtime fire early-warning signal. Fire alarm can be triggered at approximately 0.50 s when GO-PTA samples are attacked by fire. Phosphorus atoms are in situ doped into graphene layers during fire exposure, endowing GO-PTA paper with outstanding thermal oxidative stability, and thus alarm duration time of GO is greatly improved. The work develops advanced fire detection and early-warning sensors that provide reliable and continuous signals, which provide more available time for fire evacuation.
Databáze: OpenAIRE