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Porous α-Fe2O3 hollow microspheres and their application for acetone sensor

✍ Scribed by Shurong Wang; Liwei Wang; Taili Yang; Xianghong Liu; Jun Zhang; Baolin Zhu; Shoumin Zhang; Weiping Huang; Shihua Wu

Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
809 KB
Volume
183
Category
Article
ISSN
0022-4596

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✦ Synopsis

Porous a-Fe 2 O 3 hollow microspheres were synthesized through a simple and efficient carbon sphere template method. The samples were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy and N 2 adsorption-desorption.

Structural characterization indicated that as-prepared a-Fe 2 O 3 hollow microspheres had porous structure with around 200 nm in diameter and thin shell about 10 nm thick. The average pore size and Brunauer-Emmett-Teller specific surface area of a-Fe 2 O 3 hollow microspheres were 6.5 nm and 111.6 m 2 /g, respectively. The gas sensing behavior investigation showed that as-synthesized a-Fe 2 O 3 hollow microspheres exhibited very good gas sensing property to acetone vapor.

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