Facile Synthesis and Optimization of High-Performance H2s Gas Sensors Based on Pt-Co3o4@Zno Nanofibers with Dual-Mof Structure
IEEE Sensors Journal（2025）
School of Materials Science and Engineering
Abstract
Metal-organic framework (MOF) materials are recognized as outstanding templates for preparing porous metal oxides used as gas sensitive materials. Here, a facile synthesis strategy is proposed to prepare Pt-Co3O4@ZnO hollow porous nanofibers with MOF-on-MOF structure and noble metal for gas sensing applications. Sensors fabricated with this unique nanomaterial show fast response, low detection limit, high selectivity and good stability to H2S gas. Notably, the gas response of the sensor with Pt-Co3O4/ZnO nanofibers is 3 times that for the sensor with Co3O4/ZnO, and the optimal operating temperature is reduced by 125°C. Furthermore, the gas-sensing mechanism is proposed in detail and theoretical calculations based on first principles further reveal the performance enhancement of Pt-Co3O4/ZnO nanofibers to H2S. This study offers a strategy for fabricating noble metal-dropping dual MOFs-based nanofibers with abundant pores and high surface area for high-performance gas-sensing applications.
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Key words
Electrospinning,Pt-ZIF-67@ZIF-8,Pt-Co3O4/ZnO,H2S,gas sensor
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