Highly sensitive sensing platform based on ZnSnO3 hollow cubes for detection of ethanol

作者: Tingting Zhou ,Tong Zhang ,Rui Zhang ,Jianan Deng
期刊: Appl. Surf. Sci.
卷号: 2017, 400, 262-268
接收日期: 2016-12-21 18:49:41
摘要 Abstract

Abstract

Cube-shaped ZnSnO3 with hollow structure were prepared by a co-precipitation method followed by subsequent alkali etching and annealing in inert condition (nitrogen gas environment). As-synthesized ZnSnO3 hollow cubes (ZHC) have an average width of about 700 nm and wall thickness of about 110 nm. The sensor based on ZHC exhibited high response to 100 ppm ethanol at the optimal operating temperature of 260 °C, which was approximately 1.77-times higher than that of ZnSnO3 solid cubes (ZSC). Additionally, ZHC based sensor also displayed great selectivity, reproducibility and long-term stability. The excellent gas sensing performance of ZHC could be attributed to the porous surface and the hollow interior structure, which provided large surface area and good permeation. The results indicate that ZHC are highly promising materials for potential application in the field of gas sensing.

Graphical abstract

Typical ZnSnO3 materials with cubic shape and hollow structure were prepared using co-precipitation route followed by alkali etching and annealing and exhibited higher response than that of ZnSnO3 solid cube.


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Keywords

  • Cube-shaped ZnSnO3; 

  • Hollow structure; 

  • Gas sensor; 

  • High response