Sensing Characteristics of Flame-Spray-Made Pt/ZnO Thick Films as H2 Gas Sensor
Abstract
:1. Introduction
2. Experimental
2.1. Particles Synthesis and Characterization
2.2. Sensing Films Preparation and Characterization of the Gas Sensing Properties
3. Results and Discussion
3.1. Particles Properties
3.2. SEM Sensing Layer
3.3. Gas Sensing Properties
4. Conclusions
Acknowledgments
References and Notes
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Authors | Method | Doping level | Range (H2) | Sensitivity |
---|---|---|---|---|
Xu et al. [6] | Chemical precipitation | 0.5 wt% Pt | 0.2% in air | 2 at 330 °C |
0.5 wt% Ru | 0.2% in air | 6 at 230 °C and 2 at 400 °C | ||
0.5 wt% Rh | 0.2% in air | 115 at 300 °C | ||
0.5 wt% Ag | 0.2% in air | 9 at 400 °C | ||
Rout et al. [8] | ZnO nanowires and ZnO nanotubes by electrochemical deposition | 0 at.% Pt | 1,000 ppm in air | 43 at 150 °C |
1,000 ppm in air | ||||
1 at.% Pt | 1,000 ppm in air | 825 at 150 °C | ||
1,000 ppm in air | ||||
0 at.% Pt | 18 at 150 °C | |||
1 at.% Pt | 740 at 150 °C | |||
Wang et al. [9] | ZnO nanorods deposited by Molecular Beam Epitaxy (MBE) | Pt-coated | 500 ppm in N2 | Relative response of up to 8% H2 at room temp. |
Tien et al. [10] | ZnO nanorods / thin films deposited by Molecular Beam Epitaxy (MBE) | Pt-coated | 500 ppm in N2 | Response of Pt-coated nanorods was 3 times of thin films as prepared ZnO |
Phanichphant et al. [this work] | Flame spray pyrolysis | 0 at.% | 1% (10,000 ppm in air) | 0.2 at.%Pt showed the highest sensitivity of 164 at 350 °C |
0.2 at.% | ||||
1 at.% | ||||
2 at.% | 0.2 at.%Pt showed the highest sensitivity of 8.2 at 350 °C | |||
0.1% (1,000 ppm in air) |
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Tamaekong, N.; Liewhiran, C.; Wisitsoraat, A.; Phanichphant, S. Sensing Characteristics of Flame-Spray-Made Pt/ZnO Thick Films as H2 Gas Sensor. Sensors 2009, 9, 6652-6669. https://doi.org/10.3390/s90906652
Tamaekong N, Liewhiran C, Wisitsoraat A, Phanichphant S. Sensing Characteristics of Flame-Spray-Made Pt/ZnO Thick Films as H2 Gas Sensor. Sensors. 2009; 9(9):6652-6669. https://doi.org/10.3390/s90906652
Chicago/Turabian StyleTamaekong, Nittaya, Chaikarn Liewhiran, Anurat Wisitsoraat, and Sukon Phanichphant. 2009. "Sensing Characteristics of Flame-Spray-Made Pt/ZnO Thick Films as H2 Gas Sensor" Sensors 9, no. 9: 6652-6669. https://doi.org/10.3390/s90906652