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High-performance ethanol sensor based on Ag/In2O3 heterojunction with exceptional sensitivity and selectivity
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DOI：10.1039/D6TC00011H.png)
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Abstract
En 中文
Detecting ethanol is critically important due to its widespread industrial applications and potential safety hazards; posing significant risks to both industrial production and human health. However; the development of ethanol sensors with high sensitivity and selectivity remains a substantial challenge. In this study; we demonstrate a highly sensitive and selective ethanol sensor based on rationally-designed heterojunctions; fabricated by decorating In2O3 nanotubes with Ag nanoparticles (NPs) through solvothermal and coprecipitation methods. The obtained Ag/In2O3 sensor exhibits exceptional ethanol sensing performance (S = 110.5 to 100 ppm); which exhibits an approximately 11-fold enhancement compared to that of pristine In2O3; and surpasses those of most ethanol sensors ever reported. Such improvement is mainly attributed to the synergistic effects of Schottky junction formation; electronic sensitization; and chemical catalysis; which collectively enhance electron transfer efficiency and surface reaction kinetics. Moreover; the as-constructed sensor demonstrates rapid response/recovery characteristics (50/70 s); excellent selectivity against interfering gases; and remarkable long-term stability; representing its promise toward practical applications.
Keywords:
Ethanol sensor
Ag/In2O3 heterojunction
Sensitivity
Selectivity
Nanotubes
Journal
J
IF:
0
Papers:
941
Citations:
1
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