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- Title
Enhanced Sensing Ability of Brush-Like Fe 2 O 3 -ZnO Nanostructures towards NO 2 Gas via Manipulating Material Synergistic Effect.
- Authors
Liang, Yuan-Chang; Hsu, Yu-Wei
- Abstract
Brush-like α-Fe2O3–ZnO heterostructures were synthesized through a sputtering ZnO seed-assisted hydrothermal growth method. The resulting heterostructures consisted of α-Fe2O3 rod templates and ZnO branched crystals with an average diameter of approximately 12 nm and length of 25 nm. The gas-sensing results demonstrated that the α-Fe2O3–ZnO heterostructure-based sensor exhibited excellent sensitivity, selectivity, and stability toward low-concentration NO2 gas at an optimal temperature of 300 °C. The α-Fe2O3–ZnO sensor, in particular, demonstrated substantially higher sensitivity compared with pristine α-Fe2O3, along with faster response and recovery speeds under similar test conditions. An appropriate material synergic effect accounts for the considerable enhancement in the NO2 gas-sensing performance of the α-Fe2O3–ZnO heterostructures.
- Subjects
HETEROSTRUCTURES; ZINC oxide; ABILITY; GASES; CRYSTALS; NITROSYL compounds; NANOSTRUCTURES
- Publication
International Journal of Molecular Sciences, 2021, Vol 22, Issue 13, p6884
- ISSN
1661-6596
- Publication type
Article
- DOI
10.3390/ijms22136884