Microwave-assisted hydrothermal synthesis and gas sensitivity of nanostructured SnO2--颗粒学报PARTICUOLOGY

Man, L., Zhang, J., Wang, J., Xu, H., & Cao, B. (2013). Microwave-assisted hydrothermal synthesis and gas sensitivity of nanostructured SnO2. Particuology, 11(2), 242–248. https://doi.org/10.1016/j.partic.2012.01.005

Microwave-assisted hydrothermal synthesis and gas sensitivity of nanostructured SnO₂

Liying Man, Jun Zhang, Jieqiang Wang^*, Hongyan Xu, Bingqiang Cao

School of Materials Science and Engineering, University of Jinan, Jinan 250022, China

10.1016/j.partic.2012.01.005

Volume 11, Issue 2, April 2013, Pages 242-248

Received 5 December 2011, Revised 15 January 2012, Accepted 30 January 2012, Available online 30 April 2012.

E-mail: mse_wangjq@ujn.edu.cn

Highlights

► Nanostructured SnO₂ with different morphologies are synthesized by a microwave-assisted hydrothermal method.

► Temperature is a key factor in the formation of precursors.

► 3D network hierarchical architecture of the sample is beneficial to gas sensitivity.

Abstract

Precursors for nanostructured SnO₂ were synthesized via a microwave-assisted hydrothermal method under different conditions, using SnCl₂·2H₂O, urea and citric acid as reactants. After calcination of the precursors at 700 °C for 2 h, nanostructured SnO₂ with different morphologies were obtained, and were then characterized using X-ray powder diffraction (XRD), and field-emission scanning electron microscopy (FESEM). The results show that synthesis temperature and time play an important role in the formation of the 3D hierarchical morphology of the nanostructured SnO₂. Gas sensing experiments demonstrate that the synthesized SnO₂ materials, especially those with a 3D network structure, exhibit superb sensitivity to alcohol vapors at 240 °C.

Graphical abstract

Keywords

Microwave-assisted hydrothermal; Gas sensitivity; Hierarchical; Self-assemble

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