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journal article·2027-12

Biomimetic Gradient Porous Core–Shell Fibers with Enhanced Gas Sensing for CO-Temperature Dual-Mode Early Fire Warning

Lele Huang, Xingyu He, Jianan Jiang, Xiaoqian Li, Mi Zhou, Md Hasib Mia, Min Hong, Hualing He, Siqi Huo, Zhicai Yu

Nano-Micro Letters· Volume 19· Issue 1
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Abstract

Highlights A biomimetic gradient porous core–shell fiber with enhanced gas-sensing capabilities for CO-temperature early fire warning is fabricated via a coaxial wet-spinning technology. The gradient porous sheath with SnO 2 /In 2 O 3 heterojunction endows enhanced CO gas-sensing performance with high sensitivity, low detection limit and improves the CO respond of by 15%. The CO-temperature dual-mode sensing fiber integrated with a wireless early fire-warning system achieves a rapid respond to fire in ~3 s and detects 10 ppm CO gas within 19 s.
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