Three-Dimensional Hierarchical Flowerlike α-Fe2O3 Nanostructures: Synthesis and Ethanol-Sensing Properties

作者: LiLi Wang ,Teng Fei ,Zheng Lou ,Tong Zhang ,
期刊: ACS Appl. Mater. Interfaces
卷号: 2011,3 (12),4689-4694
接收日期: 2011-11-05 15:37:42
摘要 Abstract
Abstract Image

The α-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 α-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 α-Fe2O3 and investigated it for ethanol detection. Results show that the hierarchical α-Fe2O3 sensor exhibits significantly improved sensor performances in comparison with the compact α-Fe2O3 structures. The enhancement of sensing properties is attributed to the unique porous and well-aligned nanostructure.


α-Fe 2O 3; hierarchical structures; rapid response; gas sensor