TY - JOUR
T1 - Ammonia sensing performance of a platinum nanoparticle-decorated tungsten trioxide gas sensor
AU - Liu, I. Ping
AU - Chang, Ching Hong
AU - Chou, Tzu Chieh
AU - Lin, Kun Wei
N1 - Funding Information:
We would like to acknowledge Miss Hui-Jung Shih for her excellent technical support at Instrument Center, National Cheng-Kung University. This research is partially sponsored by Chaoyang University of Technology (CYUT) and Higher Education Sprout Project, Ministry of Education, Taiwan, Republic of China under the project name: "The R&D and the cultivation of talent for Health-Enhancement Products.
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/7/15
Y1 - 2019/7/15
N2 - Platinum nanoparticles (Pt NPs) are decorated on a sputtered tungsten tri-oxide (WO3) thin film to fabricate a high-performance ammonia gas sensor. These Pt NPs are synthesized by drop coating combined with UV irradiation approaches. Compared to a sensor comprising pristine WO3 thin film, the studied Pt NP/WO3 device shows a significant improvement in ammonia sensing response. The experimental results indicate that a high sensing response of 26.9 is measured under 1000 ppm NH3/air gas at 250 °C. Furthermore, even at a low concentration of 1 ppm NH3/air, a good sensing response of 3.73 is acquired from this device. The superior performance is attributed mainly to the catalytic activity and increased surface-to-volume ratio of Pt NPs. The relevant ammonia sensing properties and thermodynamic characteristics are also investigated. In addition, the Pt NP/WO3 device demonstrated in this study has advantages including a simple structure, low cost, a relatively easy fabrication process, and a wide concentration detection range.
AB - Platinum nanoparticles (Pt NPs) are decorated on a sputtered tungsten tri-oxide (WO3) thin film to fabricate a high-performance ammonia gas sensor. These Pt NPs are synthesized by drop coating combined with UV irradiation approaches. Compared to a sensor comprising pristine WO3 thin film, the studied Pt NP/WO3 device shows a significant improvement in ammonia sensing response. The experimental results indicate that a high sensing response of 26.9 is measured under 1000 ppm NH3/air gas at 250 °C. Furthermore, even at a low concentration of 1 ppm NH3/air, a good sensing response of 3.73 is acquired from this device. The superior performance is attributed mainly to the catalytic activity and increased surface-to-volume ratio of Pt NPs. The relevant ammonia sensing properties and thermodynamic characteristics are also investigated. In addition, the Pt NP/WO3 device demonstrated in this study has advantages including a simple structure, low cost, a relatively easy fabrication process, and a wide concentration detection range.
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U2 - 10.1016/j.snb.2019.04.046
DO - 10.1016/j.snb.2019.04.046
M3 - Article
AN - SCOPUS:85064406905
VL - 291
SP - 148
EP - 154
JO - Sensors and Actuators B: Chemical
JF - Sensors and Actuators B: Chemical
SN - 0925-4005
ER -