Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1528924 | Materials Science and Engineering: B | 2013 | 4 Pages |
•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.