Back to Search
Start Over
Facile synthesis of flower-like α-Fe2O3/ZnFe2O4 architectures with self-assembled core-shell nanorods for superior TEA detection
- Source :
- Current Applied Physics. 21:161-169
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- Uniform flower-like α-Fe2O3 architectures with self-assembled core-shell nanorods are constructed and successfully prepared via the facile process. The concentration of Fe salt plays a great significance for morphological evolution from nanorods to self-assembled microflowers. Flower-like α-Fe2O3/ZnFe2O4 consisting of α-Fe2O3 core and ZnFe2O4 shell nanorods are derived from FeOOH/ZIF-8 precursors. The detailed studies reveal that the tunable growth of ZIF-8 nanoparticles on three-dimensional FeOOH microflowers at room temperature and the availble calcination regulation are responsible for the formation of core-shell Fe2O3/ZnFe2O4 composites. The highest response value of flower-like α-Fe2O3/ZnFe2O4 architectures to 100 ppm triethylamine (TEA) has been improved to 141 at 280 °C, which is calculated to be 6.2 times compared with flower-like α-Fe2O3 architectures (22.7). The enhanced gas-sensing mechanism of α-Fe2O3/ZnFe2O4 composites can be attributed to the typical microflowers structures, the large specific surface area, the effective heterojunctions between α-Fe2O3 core and ZnFe2O4 shell, and the improved electron transfer process.
- Subjects :
- 010302 applied physics
Materials science
Shell (structure)
General Physics and Astronomy
Nanoparticle
Heterojunction
02 engineering and technology
021001 nanoscience & nanotechnology
01 natural sciences
law.invention
Electron transfer
chemistry.chemical_compound
chemistry
Chemical engineering
law
Specific surface area
0103 physical sciences
General Materials Science
Calcination
Nanorod
0210 nano-technology
Triethylamine
Subjects
Details
- ISSN :
- 15671739
- Volume :
- 21
- Database :
- OpenAIRE
- Journal :
- Current Applied Physics
- Accession number :
- edsair.doi...........b6c5a38fd62fbc454ad28c7a64537caa