Ethanol gas sensor based on a self-supporting hierarchical SnO2 nanorods array

Qian Liu; Zhenyu Zhang; Wenyao Li; Kaibing Xu; Rujia Zou; Junqing Hu

doi:10.1039/C4CE02367F

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Ethanol gas sensor based on a self-supporting hierarchical SnO₂ nanorods array†

Qian Liu,^a Zhenyu Zhang,^a Wenyao Li,^ab Kaibing Xu,^a Rujia Zou*^a and Junqing Hu*^a

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* Corresponding authors

^a State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
E-mail: hu.junqing@dhu.edu.cn

^b School of Material Engineering, Shanghai University of Engineering Science, Shanghai 201620, China

Abstract

3D array nanostructures assembled from 0D nanoparticles, 1D nanorods, nanowires, nanotubes, and 2D nanosheets on specific substrates are an important class of architecture in nanomaterials application. SnO₂ nanostructure arrays on different types of heterogeneous substrates have been reported. Here, we provide a self-supporting 3D hierarchical SnO₂ nanorods array on homogeneous substrate by a one-step solvothermal route with the help of an anionic surfactant. By investigating the morphology of products using different reaction conditions, the formation mechanism of the structure is proposed. The self-supporting SnO₂ nanorods array is applied as a gas sensor to a series of harmful gases. It exhibited a high response (S_r = 22.69) to ethanol gas at a low concentration of 50 ppm at 260 °C. Its unique structure with a large surface area and interval space accounts for its good performance in gas sensing.

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Article information

DOI: https://doi.org/10.1039/C4CE02367F
Article type: Paper
Submitted: 01 Dec 2014
Accepted: 06 Jan 2015
First published: 08 Jan 2015

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CrystEngComm, 2015,17, 1800-1804

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Ethanol gas sensor based on a self-supporting hierarchical SnO₂ nanorods array

Q. Liu, Z. Zhang, W. Li, K. Xu, R. Zou and J. Hu, CrystEngComm, 2015, 17, 1800 DOI: 10.1039/C4CE02367F

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