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A Highly Susceptive Mesoporous Hematite Microcube Architecture for Sustainable P-type Formaldehyde Gas Sensors
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- Authors
- Hyung Ju Park, Seok Yong Hong, Dong Hyun Chun, Shin Wook Kang, Ji Chan Park, Dae-Sik Lee
- Issue Date
- 2019-05
- Citation
- Sensors and Actuators B : Chemical, v.287, pp.437-444
- ISSN
- 0925-4005
- Publisher
- Elsevier
- Language
- English
- Type
- Journal Article
- Project Code
- 18JS1100, Development of a Mobile Diet-monitoring Technology based on Multiple Biomarkers, Dae-Sik Lee
- Abstract
- The mesoporous hematite cubic frameworks (慣-Fe2O3 microcube) with 2??3 μm sizes were prepared using a simple thermal treatment of the iron oxalate hydrate cubes (4 μm). The 慣-Fe2O3 microcube structure with a high surface area (36 m2 g?닋1) had three-dimensionally connected small grain sizes (??18 nm). In formaldehyde (HCHO) gas sensing, the fabricated device by 慣-Fe2O3 microcubes shows excellent detection ability even at low HCHO concentration (??50 ppb) and high response reaching to Rgas/Rair = 5.2 at 1 ppm as well as long-term stability, compared with conventional Fe2O3 nanoparticles.
- KSP Keywords
- Detection ability, Formaldehyde gas, Gas sensing, Grain size, High response, Long-Term Stability, Thermal treatments, gas sensors, high surface area, iron oxalate, p-Type