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<p>Firefighting clothing provides essential safeguards for firefighters while engaging in fire suppression and life rescue operations. However, the inability to actively detect hazardous gas and self-thermal degradation of conventional firefighting clothing induce critical safety threats to firefighters. Herein, we design a dual-mode perceptual sensor via programmable assembly of single-walled carbon nanotubes (SWCNTs) and Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub> MXene@MoS<sub>2</sub> nanocomposite in dual-mode triaxial structural aerogel fiber (DM-TSF) for both selective NH<sub>3</sub> and temperature monitoring. The DM-TSF is prepared through triaxial wet spinning, with an alternating <i>p</i>/<i>n</i>-type thermoelectric (TE) core, a signal decoupling aramid nanofibers layer, and an NH<sub>3</sub> sensing outer sheath. The TE core is composed of alternately interconnected <i>p</i>-type/SWCNT and <i>n</i>-type SWCNT/Polyethyleneimine, which exhibits high TE efficiency (8.44&#xa0;μV&#xa0;K<sup>−1</sup> for <i>p</i>-segment, 7.44 μV&#xa0;K<sup>−1</sup> for <i>n</i>-segment) and wide-range (10–500&#xa0;°C) temperature monitoring in DM-TSF. Furthermore, the abundant adsorption sites and high-density Schottky heterojunctions of the Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub> MXene@MoS<sub>2</sub> nanocomposite in the outer sheath enabled DM-TSF to exhibit an outstanding sensitivity (3.14%&#xa0;ppm<sup>−1</sup>@20 ppm) and high selectivity for NH<sub>3</sub>. A portable wireless system based on DM-TSF was further developed and integrated into firefighting clothing for temperature and NH<sub>3</sub> monitoring, triggering alarms within 2 s and 28 s, respectively. This work sheds new light on the fabrication of intelligent multiplex hazard detection&#xa0;fibers that can respond to multi-hazard elements, thereby enhancing firefighters’ safety in complex fire scenarios.</p> Graphical Abstract <p></p>

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Integrated Temperature–NH3 Multiplex Sensing Fibers Enabled by Programmable Assembly of MXene@MoS2 Heterojunction and p/n-Type Thermoelectric Core for Firefighting Clothing

  • 期刊论文

  • 发表日期：

    2025年8月12日

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  • Mi Zhou,
  • Lele Huang,
  • Yuhang Wan,
  • Qing Jiang,
  • Xueru Qu,
  • Md Hasib Mia,
  • Jie Xu,
  • Chao Gao,
  • Lin Hou,
  • Zhicai Yu,
  • Hualing He

摘要

Firefighting clothing provides essential safeguards for firefighters while engaging in fire suppression and life rescue operations. However, the inability to actively detect hazardous gas and self-thermal degradation of conventional firefighting clothing induce critical safety threats to firefighters. Herein, we design a dual-mode perceptual sensor via programmable assembly of single-walled carbon nanotubes (SWCNTs) and Ti3C2Tx MXene@MoS2 nanocomposite in dual-mode triaxial structural aerogel fiber (DM-TSF) for both selective NH3 and temperature monitoring. The DM-TSF is prepared through triaxial wet spinning, with an alternating p/n-type thermoelectric (TE) core, a signal decoupling aramid nanofibers layer, and an NH3 sensing outer sheath. The TE core is composed of alternately interconnected p-type/SWCNT and n-type SWCNT/Polyethyleneimine, which exhibits high TE efficiency (8.44 μV K−1 for p-segment, 7.44 μV K−1 for n-segment) and wide-range (10–500 °C) temperature monitoring in DM-TSF. Furthermore, the abundant adsorption sites and high-density Schottky heterojunctions of the Ti3C2Tx MXene@MoS2 nanocomposite in the outer sheath enabled DM-TSF to exhibit an outstanding sensitivity (3.14% ppm−1@20 ppm) and high selectivity for NH3. A portable wireless system based on DM-TSF was further developed and integrated into firefighting clothing for temperature and NH3 monitoring, triggering alarms within 2 s and 28 s, respectively. This work sheds new light on the fabrication of intelligent multiplex hazard detection fibers that can respond to multi-hazard elements, thereby enhancing firefighters’ safety in complex fire scenarios.

Graphical Abstract