P1.7.1 Synthesis and Gas-sensing Properties of Flower-like SnO2 Architectures
- Event
- 14th International Meeting on Chemical Sensors - IMCS 2012
2012-05-20 - 2012-05-23
Nürnberg/Nuremberg, Germany - Chapter
- P1.7 Nanostructured Metal Oxide-based Sensors
- Author(s)
- S. Bai, D. Li, R. Luo, K. Zhang, A. Chen - State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology (China), C. Liu - Department of Chemical Engineering, Case Western Reserve University (USA)
- Pages
- 1057 - 1059
- DOI
- 10.5162/IMCS2012/P1.7.1
- ISBN
- 978-3-9813484-2-2
- Price
- free
Abstract
Flower-like SnO2 architectures constructed of one-dimensional tetragonal prism nanorods were synthesized by a simple hydrothermal method using ethanol as dispersant agent. The morphology and structure of crystals were characterized by field emission scanning electron microscopy (FE-SEM), Xray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM). The results revealed that the SnO2 nanorods exhibited a single crystalline rutile structure with aspect ratio of nearly 20, and lattice fringes of (1 0 1) plane was 0.263 nm. The heat treatment experiments confirmed the appropriate calcination condition for as-synthesized SnO2 precursors was 400°C for 1 h. Sensor based on the flower-like SnO2 architectures exhibited the highest sensitivity of 205 to 40 ppm of CO at optimal operating temperature of 200°C, which makes it a satisfactory candidate for application in practical detecting of CO.