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Updated: Jan 24, 2026

Author Spotlight: Advancements and Applications in Nanoparticle Synthesis Through Laser Ablation in Liquids
Published on: June 16, 2023
NiO nanoparticle-decorated SnO2 nanosheets for ethanol sensing with enhanced moisture resistance
Gaoqiang Niu1,2, Changhui Zhao1,2, Huimin Gong1
1School of Microelectronics, Southern University of Science and Technology, Shenzhen, 518055 China.
Abstract:
In a high relative humidity (RH) environment, it is challenging for ethanol sensors to maintain a high response and excellent selectivity. Herein, tetragonal rutile SnO2 nanosheets decorated with NiO nanoparticles were synthesized by a two-step hydrothermal process. The NiO-decorated SnO2 nanosheet-based sensors displayed a significantly improved sensitivity and excellent selectivity to ethanol gas. For example, the 3 mol% NiO-decorated SnO2 (SnO2-3Ni) sensor reached its highest response (153 at 100 ppm) at an operating temperature of 260 °C. Moreover, the SnO2-3Ni sensor had substantially improved moisture resistance. The excellent properties of the sensors can be attributed to the uniform dispersion of the NiO nanoparticles on the surface of the SnO2 nanosheets and the formation of NiO-SnO2 p-n heterojunctions. Considering the long-term stability and reproducibility of these sensors, our study suggests that the NiO nanoparticle-decorated SnO2 nanosheets are a promising material for highly efficient detection of ethanol.
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