Journal
APPLIED SURFACE SCIENCE
Volume 605, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2022.154712
Keywords
CO sensing; Oxygen vacancies; MOFs; CeO2 nanorods
Categories
Funding
- Start-up Funds for Doctoral Research Projects of Affiliated Hospital of Weifang Medical University [2021BKQD4]
Ask authors/readers for more resources
In this study, a highly sensitive and stable CO gas sensor based on Pt-functionalized CeO2 nanorods was developed. The Pt-CeO2 sensor exhibited superior CO sensing performance with high response value, selectivity, rapid response/recovery speed, and remarkable long-term stability.
The development of feasible and facile method to construct oxygen vacancies on metal oxides is crucial for improving their gas sensing properties. In this work, we developed a highly sensitive and stable CO gas sensor based on metal-organic frameworks (MOFs) template-derived Pt nanoparticles (NPs)-functionalized CeO2 nanorods (Pt-CeO2) with abundant oxygen vacancies through facile solvothermal method. The obtained Pt-CeO 2 based sensors exhibit good thermal stability and superior CO sensing performance with high response value of 47.7% towards 500 ppm CO at 300 degrees C, which is higher than that of the pristine CeO2 sensor (17.8%). Moreover, Pt-CeO2-based sensor exhibits excellent selectivity, rapid response/recovery speed (9/11 s) and remarkable longterm stability toward CO. Finally, the enhanced CO sensing mechanism is proposed through a combination of experiments and characterizations, which is attributed to porous structure, abundant oxygen vacancies and electron sensitization effect of Pt NPs. This work not only provides unique insights into the facile design of metal oxide-based nanomaterials with abundant oxygen vacancies, but also has great application potential in building sensing systems for fast CO detection.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available