4.3.4 Synthesis and gas sensing properties of hierarchical SnO2 nanostructures
- Event
- 14th International Meeting on Chemical Sensors - IMCS 2012
2012-05-20 - 2012-05-23
Nürnberg/Nuremberg, Germany - Chapter
- 4.3 Metal Oxide-based Gas Sensors IV
- Author(s)
- P. Sun, F. Yang, H. Zhang, Y. Sun, G. Lu - State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University (China)
- Pages
- 368 - 371
- DOI
- 10.5162/IMCS2012/4.3.4
- ISBN
- 978-3-9813484-2-2
- Price
- free
Abstract
We have successfully prepared hierarchical SnO2 nanostructures via a facile hydrothermal synthesis method. Field emission scanning electron microscopic and transmission electron microscopic results reveal that these hierarchical nanostructures are built from two-dimensional (2 D) nanosheets with edge thicknesses of about 8 nm. Gas sensing tests show that the sensor using hierarchical SnO2 nanosheets exhibits high response and good selectivity to ethanol. Moreover, the sensor shows superior gas sensing performance compared with the sensor based on conventionally prepared SnO2 nanoparticles. For example, at an ethanol concentration of 100 ppm, the response of the SnO2 nanosheets is about 32.7, while the response is about 11 for nanoparticles. The enhancement in gas sensing properties is attributed to their unique structures.