Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 12, Issue 41, Pages 46267-46276Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c09130
Keywords
volatile organic compounds; nanocatalysts; gas sensor; platinum; electronic sensitization
Funding
- National Natural Science Foundation of China [51972182, 61971252]
- Shandong Provincial Natural Science Foundation [ZR2019BF008, ZR2017JL021]
- Youth Innovation Team Project of Shandong Provincial Education Department [2020KJN015]
- Qingdao Applied Fundamental Research Project [19-6-2-71-cg]
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The detection of harmful volatile organic compounds is of great significance to environmental quality and human health. However, it still remains a challenge to achieve high detection sensitivity at a relatively low temperature. Herein, an ultrasensitive catalytic sensor for the detection of triethylamine (TEA) based on ZnO/PtO/Pt nanoarray thin films was realized. Sensor measurements reveal that the PtO/Pt sensitizer dramatically reduces the working temperature from 195 degrees C of a pristine ZnO sensor to 125 degrees C of ZnO/PtO/Pt sensors. The ZnO/PtO/Pt sensors exhibit an extremely high response of 3513 to 50 ppm TEA, which is three orders of magnitude higher than that of pristine ZnO. Meanwhile, an ultralow limit of detection of 8.3 ppb is achieved. The outstanding performances are superior to those in most previous reports on TEA detection. Mechanistic investigations reveal that the outstanding performances are ascribed to the strong electronic interaction between PtO and ZnO and the catalytic spillover effect of Pt.
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