W7.1.3 - Morphological Control of ZnO and ZnO@NiO Heterojunctions: Improving Sensitivity, Selectivity, and Humidity Resistance for Gas Sensing Applications
- Event
- EUROSENSORS XXXVII
2025-09-07 - 2025-09-10
Wroclaw - Band
- Lectures
- Chapter
- W7.1 - Gas Sensors 5
- Author(s)
- P. P. Ortega, E. Longo - Federal University of São Carlos, São Carlos (Brazil), S. Gherardi, M. Astolfi, G. Zonta - SCENT S.r.l., Ferrara (Italy), E. Spagnoli, G. Cruciani, C. Malagù - University of Ferrara, Ferrara, (Italy)
- Pages
- 168 - 169
- DOI
- 10.5162/EUROSENSORS2025/W7.1.3
- ISBN
- 978-3-910600-07-2
- Price
- free
Abstract
ZnO samples with distinct morphologies and ZnO@NiO heterostructures were synthesized via a micro-wave-assisted hydrothermal method. Structural characterization confirmed crystalline phases without impurities. Plate- and rod-like ZnO morphologies were obtained, each decorated with NiO in two con-centrations. Gas sensing tests showed that ZnO plates had higher ethanol sensitivity, selectivity, and better humidity resistance than rods. ZnO@NiO heterostructures based on plates lowered the operating temperature and improved sensitivity and humidity resistance, despite reducing selectivity.