Switchable p-n gas response for 3D-hierarchical NiFe2O4 porous microspheres for highly selective and sensitive toluene gas sensors
| Autor: | Periyasamy Sivakumar, Bharat Sharma, Hyun-Seok Kim, Dhanasekaran Vikraman, Eun-Bee Jo, K. Karuppasamy |
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| Rok vydání: | 2021 |
| Předmět: |
Analyte
Materials science Nanostructure Mechanical Engineering Metals and Alloys Toluene Hydrothermal circulation law.invention Characterization (materials science) chemistry.chemical_compound Chemical engineering chemistry Operating temperature Mechanics of Materials law Materials Chemistry Calcination Porosity |
| Zdroj: | Journal of Alloys and Compounds. 886:161281 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2021.161281 |
| Popis: | Rationally designed gas sensing materials have become essential for modern efficient gas sensor with enhanced performance. This study designed and prepared ordered porous, three-dimensional hierarchical NiFe2O4 (NFO) nanoarchitectures for highly selective and sensitive toluene sensors. Two hierarchical NFO nanostructures including nanospheres and microsphere were fabricated by facile hydrothermal (NFO-Hy) and temperature-programmed calcination (NFO-550), respectively. Physicochemical characterization confirmed structure, composition, and morphology for the as-prepared materials. Nitrogen adsorption-desorption revealed improved surface area and porous properties for NFO-550 compared with NFO-Hy sensing materials, and the NFO-550 sensor achieved the maximum response 5.65 higher than NFO-Hy at optimal operating temperature. Primary analyses for carcinogenic analyte detection suggest NFO as a gas-sensitive material to be potential applicants for real-world toluene gas sensing applications. |
| Databáze: | OpenAIRE |
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