P2NG.21 - Ni-doped ZnO sensors for highly selective detection of acetone
- Event
- 17th International Meeting on Chemical Sensors - IMCS 2018
2018-07-15 - 2018-07-19
Vienna, Austria - Chapter
- P-2 - Nanomaterials for Gas Sensing
- Author(s)
- S. Alirezaei, Z. Bagheri, A. Khodadadi - Catalysis and Nanostructured Research Lab, School of Chemical Engineering, College of Engineering, University of Tehran, Tehran (Iran), A. Firooz - Shahid Rajaee University, Department of Chemistry, Tehran (Iran)
- Pages
- 884 - 885
- DOI
- 10.5162/IMCS2018/P2NG.21
- ISBN
- 978-3-9816876-9-9
- Price
- free
Abstract
In this research, gas sensing performance of Ni-doped ZnO sensors were measured for detection of 300 ppm ethanol, CO and acetone in the temperature range from 200 to 400°C. Ni-doped and single phase hexagonal ZnO plates have been synthesized by a low temperature hydrothermal method using D-ribose as a template. The response of Ni-doped ZnO sensors to acetone has been greatly improved in comparison with the response of pure ZnO and the optimal doping concentration was 5 mol% (mole ratio of Ni to Zn is 0.05). 1 and 5 mol% Ni-doped ZnO sensors showed remarkably higher sensing response to acetone compared to other gasses, making them highly selective to acetone. The highest response of 230 to 300 ppm acetone at 300°C was obtained for a doping concentration of 5 mol% Ni in ZnO. Sensitivity of pure ZnO to CO was effectively decreased by increasing the concentration of Ni.