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Bimetallic organic framework-derived porous Co3O4/Fe2O3 nanosheets for acetone sensing
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Bimetallic organic framework-derived porous Co3O4/Fe2O3 nanosheets for acetone sensing
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Journal Article
Bimetallic organic framework-derived porous Co3O4/Fe2O3 nanosheets for acetone sensing
2025
Overview
Bimetallic organic frameworks (Bi-MOFs) are increasingly recognized as highly suitable precursors for developing composite gas sensors based on metal oxide semiconductors (MOS). In this work, we synthesized a Co/Fe-bimetallic organic framework (Co/Fe-Bi-MOF) via an ion-exchange strategy, which was subsequently calcined to obtain porous Co
3
O
4
/Fe
2
O
3
nanosheet heterostructures. The prepared porous Co
3
O
4
/Fe
2
O
3
nanosheet heterojunction sensing material exhibits excellent acetone gas-sensing performance. At 190 °C, the porous Co
3
O
4
/Fe
2
O
3
nanosheet heterojunction material demonstrates remarkable sensitivity to 100 ppm acetone, with a response nearly three times higher than that of pure Co
3
O
4
, along with fast response and recovery times and a practical detection limit as low as 1 ppm. Furthermore, the porous Co
3
O
4
/Fe
2
O
3
nanosheet heterojunction material also displays outstanding performance characteristics, including reversibility, repeatability, long-term stability, selectivity, and exceptional humidity resistance. Based on various characterization data and DFT simulation results, the enhanced acetone sensitivity is primarily attributed to the synergistic effects arising from the heterojunction structure, large specific surface area, and micro-mesoporous framework. This study provides a promising strategy for developing innovative gas sensors derived from Bi-MOFs.
Publisher
Nature Publishing Group UK,Nature Portfolio
