Fabrication of Low-Temperature ppb-Level Ethanol Gas Sensor Based on Hierarchical NiO-SnO2 Nanoflowers Under Hydrothermal Conditions

Hierarchical NiO-SnO<sub>2</sub> nanoflowers were prepared via a one-step hydrothermal method. The morphology, structure and components of the hierarchical NiO-SnO<sub>2</sub> nanoflowers were examined via scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray powder diffraction (XRD) and X-ray photoelectron spectroscopy (XPS), respectively. The ethanol gas-sensing performance was systematically analyzed between pure hierarchical SnO<sub>2</sub> nanoflowers and the hierarchical NiO-SnO<sub>2</sub> nanoflowers. The results indicated that the hierarchical NiO-SnO<sub>2</sub> nanoflowers showed better gas-sensing properties than the pure hierarchical SnO<sub>2</sub> nanoflowers at 164 °C. The enhanced gas-sensing performance was ascribed to the formation of p-n heterojunctions between p-type NiO and n-type SnO<sub>2</sub>. Additionally, NiO has a catalytic role. Therefore, hierarchical NiO-SnO<sub>2</sub> nanoflowers could be a potential gas-sensing material for the fabrication of high-quality ethanol gas sensors.

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Publication Details

Journal
Nanomaterials
Published
2025-09-25
DOI
https://doi.org/10.3390/nano15191471
Primary Topic
Gas Sensing Nanomaterials and Sensors
Type
article
Field-Weighted Citation Impact
0.00

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article

Fabrication of Low-Temperature ppb-Level Ethanol Gas Sensor Based on Hierarchical NiO-SnO2 Nanoflowers Under Hydrothermal Conditions

Chuhong Wang, Xiaoxin Dou, Zhenqing Dai, Jianmei Shao et al.
Nanomaterials
Gas Sensing Nanomaterials and Sensors
article

Fabrication of Low-Temperature ppb-Level Ethanol Gas Sensor Based on Hierarchical NiO-SnO2 Nanoflowers Under Hydrothermal Conditions

Chuhong Wang, Xiaoxin Dou, Zhenqing Dai, Jianmei Shao, Jinsheng He, Lijuan Yan, Yuanzheng Luo, L. M. Song, Qin Xie, Yuqing Cai, Fumiao Liu, Ruikun Sun, Yuting Li, Chengyong Li
article en

Abstract

Hierarchical NiO-SnO<sub>2</sub> nanoflowers were prepared via a one-step hydrothermal method. The morphology, structure and components of the hierarchical NiO-SnO<sub>2</sub> nanoflowers were examined via scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray powder diffraction (XRD) and X-ray photoelectron spectroscopy (XPS), respectively. The ethanol gas-sensing performance was systematically analyzed between pure hierarchical SnO<sub>2</sub> nanoflowers and the hierarchical NiO-SnO<sub>2</sub> nanoflowers. The results indicated that the hierarchical NiO-SnO<sub>2</sub> nanoflowers showed better gas-sensing properties than the pure hierarchical SnO<sub>2</sub> nanoflowers at 164 °C. The enhanced gas-sensing performance was ascribed to the formation of p-n heterojunctions between p-type NiO and n-type SnO<sub>2</sub>. Additionally, NiO has a catalytic role. Therefore, hierarchical NiO-SnO<sub>2</sub> nanoflowers could be a potential gas-sensing material for the fabrication of high-quality ethanol gas sensors.

NanomaterialsVol. 15(19)
Guangdong Ocean University (CN)
Basic and Applied Basic Research Foundation of Guangdong Province
Openalex Percentile: Top 74%
Gas Sensing Nanomaterials and Sensors
DOIOpen Access PDFOpenAlex
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