Fe3O4–NiO core–shell composites: Hydrothermal synthesis and toluene sensing properties

Fe3O4–NiO core–shell composites were prepared via a simple one-step hydrothermal method. The synthesis was conducted in water–ethanol–butanol mixed solvent without any templates. The structure and morphology of the composites were characterized by X-Ray diffraction (XRD), X-Ray photoelectron spectro...

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Bibliographic Details
Published in:Materials letters 2014-10, Vol.132, p.167-170
Main Authors: Qu, Fengdong, Wang, Yongfan, Liu, Juan, Wen, Shanpeng, Chen, Yu, Ruan, Shengping
Format: Article
Language:English
Subjects:
Detection
Diffraction
Fe3O4–NiO
Nanocomposites
Semiconductors
Sensors
Shells
Synthesis
Toluene
X-ray diffraction
X-ray photoelectron spectroscopy
X-rays
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Summary:Fe3O4–NiO core–shell composites were prepared via a simple one-step hydrothermal method. The synthesis was conducted in water–ethanol–butanol mixed solvent without any templates. The structure and morphology of the composites were characterized by X-Ray diffraction (XRD), X-Ray photoelectron spectroscopy (XPS) and field emission scanning electron microscopy (FESEM). The results showed that these porous architectures were assembled from Fe3O4 sphere core and NiO flower-like shells. To demonstrate the use of the composites, a chemical gas sensor has been fabricated and investigated for toluene detection. The sensor exhibits excellent toluene sensing performances in terms of high response, superior selectivity, and rapid response-recovery. •Fe3O4-NiO core-shell composites were synthesized via a facile hydrothermal method.•The synthesis was conducted in water-ethanol-butanol solvent without any templates.•Sensor based on Fe3O4-NiO composites exhibits excellent toluene sensing performances.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2014.06.060