Issue 9, 2012
From the journal:

CrystEngComm

Large-scale selective preparation of porous SnO2 3D architectures and their gas-sensing property†

Jiarui Huang,*a   Xiaojuan Xu,a   Cuiping Gu,*a   Siyuan Yao,a   Yufeng Sun*b  and  Jinhuai Liuc  

* Corresponding authors

a College of Chemistry and Materials Science, Anhui Normal University, Wuhu, P.R. China
E-mail: jrhuang@mail.ahnu.edu.cn, cpgu2008@mail.ahnu.edu.cn
Fax: +86 5533869303
Tel: +86 5533869303

b Mechanical Engineering Department, Anhui Polytechnic University, Wuhu, P.R. China
E-mail: sunyufeng118@126.com

c Research Center for Biomimetic Functional Materials and Sensing Devices, Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, P.R. China

Abstract

Porous SnO2 cubes and rods were obtained by a facile chemical solution route combined with subsequent calcination and an acid-washing process. Techniques of X-ray diffraction, scanning electron microscopy, thermogravimetric-differential thermalgravimetric analysis, transmission electron microscopy, and Brunauer–Emmett–Teller N2 adsorption–desorption analyses were used to characterize the structure and morphology of the products. The process of inducing porosity starts with a crystalline single-phase hydroxide precursor CuSn(OH)6 formed by the co-precipitation of the metal ions from aqueous solution. Thermal decomposition of the precursors leads to an intimate mixture of CuO and porous tetragonal SnO2. The porous SnO2 3D architectures are obtained after the CuO particles are removed by acid-washing. A decomposition–aggregation–dissolution process is proposed to demonstrate the formation of such a special structure. Furthermore, gas sensing properties of the as-prepared porous SnO2 3D architectures were investigated using toluene and formaldehyde as the representative target gases. The porous SnO2 3D architectures exhibit excellent sensing performances due to the high porosity and 3D morphology, which can significantly facilitate gas diffusion and mass transportation in sensing materials. This work further hints that this new facile and economical approach can be extended to synthesize other porous metal oxide materials with a unique morphology or shape.

Graphical abstract: Large-scale selective preparation of porous SnO2 3D architectures and their gas-sensing property

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Article information

DOI
https://doi.org/10.1039/C2CE06738B
Article type
Paper
Submitted
26 Dec 2011
Accepted
23 Jan 2012
First published
25 Jan 2012

CrystEngComm, 2012,14, 3283-3290

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Large-scale selective preparation of porous SnO2 3D architectures and their gas-sensing property

J. Huang, X. Xu, C. Gu, S. Yao, Y. Sun and J. Liu, CrystEngComm, 2012, 14, 3283 DOI: 10.1039/C2CE06738B

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