首页|Single Pt atom-based gas sensor: Break the detection limit and selectivity of acetone

Single Pt atom-based gas sensor: Break the detection limit and selectivity of acetone

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  • NETL
  • NSTL
  • Elsevier
To improve gas sensing performance of oxide semiconductor is a collective goal of science community, due to that gas sensor is a class of pivotal component of environmental monitoring, the Internet of things and medical equipment. We introduced isolated single platinum atoms on the defective WO_(3-x) nanosheets (SA-Pt/WO_(3-x)), and investigated the status of single atoms by XPS, HAADF-STEM and in situ FT-IR and so forth. The SA-Pt/ WO_(3-x) based sensor exhibits high response level (R_a/R_g=43.4 to 5 ppm), exceptional ultrahigh selectivity (S_(best)/ S_(second)=2.8) and ultimate detection limit (R_a/R_g=4.3 to 0.1 ppm) in acetone gas sensing. In addition, the counterparts of WO_3 and Pt nanoparticles were utilized as comparison to investigate the synthesis and gas sensing mechanism thoroughly. This work illustrates the research to fit the needs of ultralow concentration gas sensor application.

Single atomDefective oxideAcetone gas sensorDetection limit

Tongwei Yuan、Zhenggang Xue、Yang Chen、Jiaqiang Xu

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NEST Lab (New Energy and Sensor Technology Lab), Department of Chemistry, College of Science, Shanghai University, Shanghai 200444, China, Key Laboratory of Organic Compound Pollution Control Engineering (MOE), School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China

NEST Lab (New Energy and Sensor Technology Lab), Department of Chemistry, College of Science, Shanghai University, Shanghai 200444, China

Key Laboratory of Organic Compound Pollution Control Engineering (MOE), School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China

2023

10.1016/j.snb.2023.134139

Sensors and actuators, B. Chemical

Sensors and actuators, B. Chemical

ISSN：0925-4005
年,卷(期)：2023.397(Dec.)
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