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Issue 103, 2016
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Fabrication of CeO2/ZnCo2O4 n–p heterostructured porous nanotubes via electrospinning technology for enhanced ethanol gas sensing performance

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Abstract

Nanocomposite materials with a one-dimensional structure have rapidly developed in recent years. Metal oxides are applied in a wide range of daily applications. In this paper, pure CeO2 and composite CeO2/ZnCo2O4 nanotubes are successfully synthesized by single capillary electrospinning technology and post heat treatment. The structure and composition of pure CeO2 and the composite CeO2/ZnCo2O4 nanotubes are confirmed by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Scanning electron microscopy (SEM), transmission electron microscopy (TEM), and high resolution transmission electron microscopy (HRTEM) images identify the as-synthesized materials as hollow, mesoporous structures; the long nanotubes of both samples have a diameter around 60 nm, and the composite CeO2/ZnCo2O4 has a high porosity. The surface structure characteristics of these samples are characterized by N2 absorption–desorption isothermal analysis (Brunauer–Emmett–Teller, BET) and a large surface area is exhibited for the composite CeO2/ZnCo2O4 nanotubes of 80.989 m2 g−1. The QR-2 gas sensing system was used to measure the gas sensing properties of the test materials. We show an excellent improvement in the response and selectivity of the n–p heterojunction CeO2/ZnCo2O4 nanotubes in comparison with pure CeO2 nanotubes to ethanol gas at an optimal temperature of 180 °C. The gas sensing mechanism of the as-obtained materials toward ethanol gas is discussed. This material has promising potential in the gas sensing field.

Graphical abstract: Fabrication of CeO2/ZnCo2O4 n–p heterostructured porous nanotubes via electrospinning technology for enhanced ethanol gas sensing performance

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Publication details

The article was received on 11 Aug 2016, accepted on 13 Oct 2016 and first published on 14 Oct 2016


Article type: Paper
DOI: 10.1039/C6RA20326D
Citation: RSC Adv., 2016,6, 101626-101637
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    Fabrication of CeO2/ZnCo2O4 n–p heterostructured porous nanotubes via electrospinning technology for enhanced ethanol gas sensing performance

    K. T. Alali, T. Liu, J. Liu, Q. Liu, Z. Li, H. Zhang, K. Aljebawi and J. Wang, RSC Adv., 2016, 6, 101626
    DOI: 10.1039/C6RA20326D

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