Grain Size Control and Ethanol Sensing Properties of Calcined SnO₂ Nanoparticles

Abstract:

SnO2 nanoparticles were prepared via a sol-gel method by heating the mixture of hydrous SnO2 nanoparticles and SiO2 nanospheres at 600 °C. The average particle size of the obtained SnO2 nanoparticles is 3.3 nm, smaller than that of the SnO2 nanoparticles (~ 6.4 nm) prepared by calcining the pure hydrous SnO2 at 600 °C. The SiO2 nanospheres play an important role in restricting SnO2 nanocrystal growth. The ~3.3 nm-sized SnO2 nanoparticles exhibited high sensitivity for ethanol as well as quick response and recovery time. The concentration detection limit can be as low as 5 ppm at room temperature.

• Periodical: Advanced Materials Research (Volume 266)
• Pages: 76-79
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.266.76
• Online since: June 2011
• Authors: Yu Wang, Xiao Lin Jia, Lin Dong, Shaokang Guan
• Keywords: Ethanol, Gas Sensor, Nanoparticle, SiO₂, SnO₂

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