Porous sheet-like and sphere-like nano-architectures of SnO2 nanoparticles via a solvent-thermal approach and their gas-sensing performances |
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| Authors: | Jie Liu Xin-Cun Tang Yuan-Hua Xiao Hai Jia Mei-Li Gong Fu-Qin Huang |
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| Affiliation: | 1. College of Chemistry and Chemical Engineering, State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;2. State Laboratory of Surface and Interface Science and Technology (SLSIST), Zhengzhou University of Light Industry, Zhengzhou 450002, China |
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| Abstract: | 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. |
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| Keywords: | SnO2 nano-architectures Sheet-like Sphere-like Controlled synthesis Gas sensor |
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