Issue 89, 2015

Facile fabrication and enhanced gas sensing properties of hierarchical MoO3 nanostructures

Abstract

Hierarchical nanostructures are very promising gas-sensing materials due to their well-aligned structures with less agglomerated configurations. In this paper, hierarchical MoO3 nanostructures were successfully synthesized through the oxidization conversion of hydrothermally synthesized MoS2 precursors. The morphology and microstructure were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), thermogravimetric and differential scanning calorimeter analysis (TG-DSC), transmission electron microscopy (TEM), X-ray photoelectron spectra (XPS), and N2 adsorption–desorption analyses. The results clearly reveal that MoS2 precursors can completely transfer into MoO3 via the annealing process at 400 °C. And the as-prepared hierarchical MoO3 nanostructures are about 500 nm in diameter, which are constructed by relatively densely packed nanosheets with the thickness of around 5–10 nm. Based on the experimental results, a possible mechanism for the formation of hierarchical MoO3 nanostructures was speculated. Furthermore, owing to the well-defined and uniform hierarchical structure, the sensor based on hierarchical MoO3 nanostructures shows superior gas sensing performance towards ethanol and it maybe has potential application in the detection of ethanol vapors.

Graphical abstract: Facile fabrication and enhanced gas sensing properties of hierarchical MoO3 nanostructures

Article information

Article type
Paper
Submitted
04 Jul 2015
Accepted
21 Aug 2015
First published
21 Aug 2015

RSC Adv., 2015,5, 72728-72735

Author version available

Facile fabrication and enhanced gas sensing properties of hierarchical MoO3 nanostructures

H. Yan, P. Song, S. Zhang, Z. Yang and Q. Wang, RSC Adv., 2015, 5, 72728 DOI: 10.1039/C5RA13036K

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