Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 3, Issue 12, Pages 4689-4694Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am201112z
Keywords
alpha-Fe2O3; hierarchical structures; rapid response; gas sensor
Funding
- Natural Science Foundation Committee (NSFC) [609710]
- Jilin University [201004003]
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The alpha-Fe2O3 hierarchical nanostructures have been successfully synthesized via a simple solvothermal method. The as-prepared samples are loose and porous with flowerlike structure, and the subunits are irregularly shaped nanosheets. The morphology of the alpha-Fe2O3 structures was observed to be tunable as a function of reaction time. To demonstrate the potential applications, we have fabricated a gas sensor from the as-synthesized hierarchical alpha-Fe2O3 and investigated it for ethanol detection. Results show that the hierarchical alpha-Fe2O3 sensor exhibits significantly improved sensor performances in comparison with the compact alpha-Fe2O3 structures. The enhancement of sensing properties is attributed to the unique porous and well-aligned nanostructure.
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