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Issue 7, 2017
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P–p heterojunction CuO/CuCo2O4 nanotubes synthesized via electrospinning technology for detecting n-propanol gas at room temperature

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Abstract

Semiconductor materials based on composite metal oxide nanomaterials have attracted enormous attention recently due to their unique chemical and electrical properties. P–p heterojunction CuO/CuCo2O4 nanotubes were synthesized by simple single-capillary electrospinning technology followed by a heat treatment process to achieve the tubular structure. Nanotubes with diameters in the range of 60–70 nm with a large specific surface area of as-prepared materials have been demonstrated by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and N2 absorption–desorption isothermal analysis (Brunauer–Emmett–Teller, BET) of composite CuO/CuCo2O4 nanotubes. The composition and crystal structure of CuO/CuCo2O4 nanotubes were confirmed by X-ray diffraction, energy-dispersive X-ray spectrometry (EDX) analyses, and X-ray photoelectron spectroscopy (XPS). Room temperature gas sensing performance of CuO/CuCo2O4 nanotubes toward n-propanol gas was investigated, where a response of 14 with rapid response (6.3 s)–recovery (4.1 s) times have been measured for 10 ppm n-propanol at room temperature. The stability, selectivity and sensing mechanism of p–p heterostructure CuO/CuCo2O4 nanotubes were investigated and discussed as well.

Graphical abstract: P–p heterojunction CuO/CuCo2O4 nanotubes synthesized via electrospinning technology for detecting n-propanol gas at room temperature

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Publication details

The article was received on 10 Apr 2017, accepted on 24 May 2017 and first published on 25 May 2017


Article type: Research Article
DOI: 10.1039/C7QI00192D
Citation: Inorg. Chem. Front., 2017,4, 1219-1230
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    P–p heterojunction CuO/CuCo2O4 nanotubes synthesized via electrospinning technology for detecting n-propanol gas at room temperature

    K. T. Alali, Z. Lu, H. Zhang, J. Liu, Q. Liu, R. Li, K. Aljebawi and J. Wang, Inorg. Chem. Front., 2017, 4, 1219
    DOI: 10.1039/C7QI00192D

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