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- Title
Study on the Deterioration Mechanism of Pb on TiO 2 Oxygen Sensor.
- Authors
Duan, Chao; Zhang, Lejun; Wu, Zhaoxi; Wang, Xu; Meng, Meng; Zhang, Maolin
- Abstract
Previous studies have shown that the pollutants in exhaust gas can cause performance deterioration in air-fuel oxygen sensors. Although the content of Pb in fuel oil is as low as 5 mg/L, the effect of long-term Pb accumulation on TiO2 oxygen sensors is still unclear. In this paper, the influence mechanism of Pb-containing additives in automobile exhaust gas on the response characteristics of TiO2 oxygen sensors was simulated and studied by depositing Pb-containing pollutants on the surface of a TiO2 sensitive film. It was found that the accumulation of Pb changed the surface gas adsorption state and reduced the activation energy of TiO2, thus affecting the steady-state response voltage and response speed of the TiO2-based oxygen sensor.
- Subjects
OXYGEN detectors; TITANIUM dioxide; STEADY-state responses; WASTE gases; GAS absorption &; adsorption; AUTOMOBILE emissions; PETROLEUM as fuel; ACTIVATION energy
- Publication
Micromachines, 2023, Vol 14, Issue 1, p156
- ISSN
2072-666X
- Publication type
Article
- DOI
10.3390/mi14010156