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Issue 20, 2017
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Design of nanostructured WO3·0.33H2O via combination of ultrasonic spray nozzle and microwave-assisted hydrothermal methods for enhancing isopropanol gas sensing at room temperature

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Abstract

Hierarchical WO3·0.33H2O nanocolumns were prepared by a simple combination of ultrasonic spray nozzle (USN) and microwave-assisted hydrothermal (MAH) methods. The USN step promoted a high nucleation rate of H2WO4 clusters, while glycine played an important role in the crystal growth in a preferred direction. The MAH step was responsible for the crystallization of the single orthorhombic WO3·0.33H2O phase and the self-assembly of the hierarchical structure. The as-prepared sample was tested as a volatile organic compound (VOC) sensor at room temperature (22 °C) and wet conditions. Enhanced isopropanol sensitivity and selectivity were achieved due to the high specific surface area provided by the combination of USN and MAH methods. Thus, this synthesis strategy is a promising approach for fabricating different gas sensing devices.

Graphical abstract: Design of nanostructured WO3·0.33H2O via combination of ultrasonic spray nozzle and microwave-assisted hydrothermal methods for enhancing isopropanol gas sensing at room temperature

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Publication details

The article was received on 17 Mar 2017, accepted on 24 Apr 2017 and first published on 24 Apr 2017


Article type: Paper
DOI: 10.1039/C7CE00523G
Citation: CrystEngComm, 2017,19, 2733-2738
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    Design of nanostructured WO3·0.33H2O via combination of ultrasonic spray nozzle and microwave-assisted hydrothermal methods for enhancing isopropanol gas sensing at room temperature

    T. M. Perfecto, C. A. Zito and D. P. Volanti, CrystEngComm, 2017, 19, 2733
    DOI: 10.1039/C7CE00523G

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