Journal
APPLIED SURFACE SCIENCE
Volume 577, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2021.151877
Keywords
NiO-In 2 O 3; P-n heterojunctions; Flower-like structures; Gas Sensors; Trimethylamine
Categories
Funding
- National Natural Science Foundation of China [61973223, 62033002]
- Liaoning Educational Department Foundation [LJ2020001, LQ2019013]
- Liao Ning Revitalization Talents Program [XLYC2007051]
- Natural Science Foundation of Liaoning Province [2019-ZD-0072]
- Young and middle-aged scientific and technological innovation talents of Shenyang Science and Technology Bureau [RC200352]
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The gas sensor fabricated from NiO-functionalized In2O3 flower-like structures exhibits enhanced detection performance for TMA gas, with high reproducibility, stability, selectivity, and a low detection limit, showcasing a widely applicable strategy for improving the gas sensing properties of metal oxide semiconductors.
NiO-functionalized In2O3 flower-like structures were successfully synthesized via a simple one-step hydrothermal route and applied in gas sensors for trimethylamine (TMA) detection. By virtue of the unique 3D hierarchical flower-like structures, p-n heterojunctions and the catalytic activity of NiO, NiO-functionalized In2O3 shows enhanced TMA gas sensing performance. Specifically, the sensor fabricated from 0.05-NiO-In2O3 composites with well-defined flower-like structures shows the highest response of about 20.5 to 10 ppm TMA at 200 degrees C, which is 4.7 times higher than that of the pure In2O3 flower-like structures (4.4 to 10 ppm TMA). Besides, this sensor shows good reproducibility and stability, high selectivity and a ppb-level detection limit of 1.5 to 0.5 ppm (500 ppb) TMA, providing a widely applicable strategy to improve the gas sensing properties of metal oxides semiconductors.
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