| Nickel ion-doped vertical nanorod array network of ZnO engineered by chemical bath deposition for versatile NO2 gas sensor |
Sandip M. Nikam1, Tanaji S. Patil2, Nilam A. Nimbalkar3, Vijay P. Kothavale2, Raviraj S. Kamble4, Gautam A. Gaikwad5, Sagar M. Mane6
, Jaewoong Lee6, Ravindra D. Mane1 |
1Department of Physics, Jaysingpur College, Jaysingpur, Shivaji University, Kolhapur, 416001, Maharashtra, India
2Department of Physics, Bhogawati Mahavidyalaya, Kurukali, Shivaji University, Kolhapur, 416001, Maharashtra, India
3Sharad Institute of Technology, Polytechnic, Yadrav, Ichalkaranji, 416121, Maharashtra, India
4Department of Chemistry, Bhogawati Mahavidyalaya, Kurukali, Shivaji University, Kolhapur, 416001, Maharashtra, India
5Department of Chemistry, Shrimant Babasaheb Deshmukh Mahavidyala, Atpadi, Sangli, 415301, Maharashtra, India
6Department of Fiber System Engineering, Yeungnam University, Gyeongsan, Gyeongbuk, 38541, Republic of Korea |
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Received: August 18, 2024; Revised: November 16, 2024 Accepted: December 1, 2024. Published online: January 7, 2025. |
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| ABSTRACT |
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In this study, we report the fabrication and characterization of a Nickel ion-doped vertical nanorod array network of ZnO, engineered using a chemical bath deposition (CBD) method on a glass substrate for application as a versatile NO2 gas sensor. The influence of incorporating Ni2+ ions at various molar percentages into the ZnO nanorod matrix was comprehensively assessed, with a focus on structural, optical, and NO2 sensing characteristics. The ZnO nanorods doped with 1 mol % Ni showed a significant enhancement in NO2 gas sensing performance, demonstrating high sensitivity, selectivity, and rapid response and recovery times at 200 °C. This enhanced performance is attributed to the increased surface area, improved charge carrier mobility, and the catalytic activity of the Ni ions. The sensor’s response to varying concentrations of NO2 gas was systematically investigated, revealing a linear relationship between gas concentration and sensor response, thereby indicating its potential for practical environmental monitoring applications. Our findings suggest that Ni-doped ZnO nanorod arrays synthesized via CBD represent a promising avenue for the development of efficient, low-cost, and high-performance gas sensors. |
| Key words:
Chemical bath deposition · Hexagonal ZnO nanorod arrays · Ni2+ doping · NO2 gas sensor |
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