Article ID Journal Published Year Pages File Type
1528924 Materials Science and Engineering: B 2013 4 Pages PDF
Abstract

•Porous sheet-like and sphere-like nano-architectures of SnO2 nanoparticles have been prepared.•A solvent-thermal approach without surfactant or polymer templates simply by changing the volume ratio of DMF to water.•The formation mechanism of nano-architectures is proposed in this article.•Porous sphere-like SnO2 nano-architectures exhibit good sensitivity to the reduce vapors tested.•Sheet-like materials show better selectivity to ethanol.

Porous sheet-like and sphere-like nano-architectures of SnO2 nanoparticles have been prepared via a solvent-thermal approach in the absence of any surfactant or polymer templates by simply changing the volume ratio of DMF to water. The nano-materials have been characterized by FESEM, XRD, IR, TEM and BET. A mechanism for the formation of nano-architectures is also proposed based on the assembly behaviors of DMF in water. The gas sensors constructed with porous sphere-like SnO2 nano-architectures exhibit much higher sensitivity to the reduce vapors tested, compared to those from porous sheet-like SnO2 materials, while the sheet-like materials show better selectivity to ethanol. The nano-architectures fabricated with the facile method are promising candidates for building chemical sensors with tunable performances.

Related Topics
Physical Sciences and Engineering Materials Science Electronic, Optical and Magnetic Materials
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