In-Situ Hydrothermal Synthesis of Oriented Hematite Nanorods for Sub-ppm Level Detection of Ozone Gas - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Alloys and Compounds Année : 2023

In-Situ Hydrothermal Synthesis of Oriented Hematite Nanorods for Sub-ppm Level Detection of Ozone Gas

Résumé

The development of simple and reproducible synthesis techniques for obtaining one-dimensional semiconducting nanostructures is essential for the advancement of gas sensor devices. We report a facile and versatile approach for the in-situ growth of vertically oriented hematite nanorods to be applied as a resistive ozone gas sensor. The α-Fe2O3 nanorods were grown via a hydrothermal treatment directly onto an Al2O3 substrate with interdigitated Pt electrodes, thus facilitating the integration of nanorods into the sensing platform. At 150 °C, the gas-sensing experiments revealed a good sensitivity of these nanorods to different ozone concentrations (10 to 570 ppb), besides a fast response time and repeatable response–recovery cycles. The present study offers a promising way for designing high-performance gas sensors based on hematite nanorods.
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hal-04009914 , version 1 (26-01-2024)

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Ariadne Catto, Sandrine Bernardini, Khalifa Aguir, Elson Longo, Luís da Silva. In-Situ Hydrothermal Synthesis of Oriented Hematite Nanorods for Sub-ppm Level Detection of Ozone Gas. Journal of Alloys and Compounds, 2023, pp.169444. ⟨10.1016/j.jallcom.2023.169444⟩. ⟨hal-04009914⟩
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