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Enhanced selective acetone-sensing performance of hierarchical hollow SnO2/α-Fe2O3 microcubes
- Source :
- Journal of Materials Chemistry C. 7:11984-11990
- Publication Year :
- 2019
- Publisher :
- Royal Society of Chemistry (RSC), 2019.
-
Abstract
- Template-controlled syntheses via metal–organic frameworks (MOFs) have emerged as a general strategy to fabricate metal oxides with tailored porous structures. Here, novel hierarchical SnO2/α-Fe2O3 hollow microcubes have been obtained by post-loading of Sn2+ ions on the surface of Fe4(Fe(CN)6)3 microcubes and a subsequent thermolysis route. The as-formed hierarchical SnO2/α-Fe2O3 composites exhibit remarkable selective acetone-sensing properties, in which the optimum composition of SnO2/α-Fe2O3 with Sn : Fe = 1.5 exhibits the best response towards 200 ppm acetone gas under the operating temperature of 270 °C (with gas response Ra/Rg = 9.3), with a fast response/recovery speed (6 s/7 s), as well as excellent reproducibility for at least 15 days without a significant change in response. The applied strategy provides a general and controllable method to access other hierarchically structured multi-metal oxide architectures with intriguing morphologies and adjustable sensing properties.
- Subjects :
- Materials science
Thermal decomposition
Oxide
02 engineering and technology
General Chemistry
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
0104 chemical sciences
Ion
Metal
chemistry.chemical_compound
chemistry
Chemical engineering
Operating temperature
visual_art
Materials Chemistry
Acetone
visual_art.visual_art_medium
SN2 reaction
0210 nano-technology
Porosity
Subjects
Details
- ISSN :
- 20507534 and 20507526
- Volume :
- 7
- Database :
- OpenAIRE
- Journal :
- Journal of Materials Chemistry C
- Accession number :
- edsair.doi...........f30927cb05181f369aaa9f2aa32cf0f9