Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
11019938 | Journal of Alloys and Compounds | 2019 | 25 Pages |
Abstract
We report the characterization and NOx gas sensing properties of Zn doped NiCo2O4 mesoporous rods obtained through a simple hydrothermal approach. X-ray powder diffraction confirms the spinel structure with cell parameter (a) of 8.110â¯Ã
. X-ray photoelectron spectroscopy studies reveal the oxidation states of metal oxides. N2-adsorption-desorption analysis and electron microscopic studies show the mesoporous nature of the sample. The specific surface area is found to be 76â¯m2â¯gâ1 with an average pore diameter of 21â¯nm. The thick film of Zn doped NiCo2O4 mesoporous rods exhibit good gas sensing characteristics towards NOx. Gas response of the sensor increases with concentration of NOx from 2â¯ppm to 200â¯ppm. It has a response time of 28â¯s and recovery time of 30â¯s towards 10â¯ppm NOx gas at 200â¯Â°C. The NOx gas concentration dependent responses and cyclic tests of the sensor demonstrate better reliability and reproducibility with regards to NOx gas sensing.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Vijay Kumar, C.R. Mariappan,