Abstract
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.
| Original language | English |
|---|---|
| Article number | 161281 |
| Journal | Journal of Alloys and Compounds |
| Volume | 886 |
| DOIs | |
| State | Published - 15 Dec 2021 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2021 Elsevier B.V.
Funding
This work was supported by the Mid-career Researcher Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT (No. 2019R1A2C2086747 ).
| Funders | Funder number |
|---|---|
| Ministry of Science, ICT and Future Planning | 2019R1A2C2086747 |
| National Research Foundation of Korea |
Keywords
- Microsphere
- Nickel iron oxide
- Textural properties
- Toluene sensor
- Toxic analyte