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- W3083488922 abstract "Identifying the nature of gas-sensing material under the real-time operating condition is very critical for the research and development of gas sensors. In this work, we implement in situ Raman and XRD to investigate the gas-sensing nature of α-Fe 2 O 3 sensing material, which derived from Fe-based metal-organic gel (MOG). The active mode of α-Fe 2 O 3 as gas-sensing material originate from the thermally induced lattice expansion and the changes of surface oxygen vacancy of α-Fe 2 O 3 could be reflected from the further monitored Raman scattering signals during acetone gas sensing. Meanwhile, the prepared α-Fe 2 O 3 gas sensor exhibits excellent gas-sensing performance with high response value (R a /R g = 27), rapid response/recovery time (1 s/80 s) for 100 ppm acetone gas, and broad response range (5 – 900 ppm) at 183 °C. Strategies described herein could provide a promising approach to obtain gas-sensing materials with excellent performance and unveil the gas-sensing nature for other metal-oxide-based chemiresistors. This work implemented in situ Raman spectroscopy to unravel the lattice expansion and oxygen vacancy of α-Fe 2 O 3 during acetone gas sensing. • A promising strategy to synthesize gas-sensing material with excellent performance. • In situ Raman spectroscopy for unraveling the gas-sensing nature of α-Fe 2 O 3 . • Real-time Raman scattering signals of α-Fe 2 O 3 were tracked during gas sensing. • Tracked Raman signals reflected the lattice expansion and oxygen vacancy of α-Fe 2 O 3 ." @default.
- W3083488922 created "2020-09-11" @default.
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- W3083488922 date "2021-01-01" @default.
- W3083488922 modified "2023-10-16" @default.
- W3083488922 title "Lattice expansion and oxygen vacancy of α-Fe2O3 during gas sensing" @default.
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- W3083488922 doi "https://doi.org/10.1016/j.talanta.2020.121616" @default.
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- W3083488922 hasPublicationYear "2021" @default.
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