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SnO 2 Nanoparticles-CeO 2 Nanorods Enriched with Oxygen Vacancies for Bifunctional Sensing Performances toward Toxic CO Gas and Arsenate Ions.
- Source :
-
ACS omega [ACS Omega] 2022 May 30; Vol. 7 (23), pp. 20357-20368. Date of Electronic Publication: 2022 May 30 (Print Publication: 2022). - Publication Year :
- 2022
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Abstract
- In this paper, we present a novel, one-step synthesis of SnO <subscript>2</subscript> nanoparticle-CeO <subscript>2</subscript> nanorod sensing material using a surfactant-mediated hydrothermal method. The bifunctional utility of the synthesized sensing material toward room-temperature sensing of CO gas and low-concentration optosensing of arsenic has been thoroughly investigated. The CeO <subscript>2</subscript> -SnO <subscript>2</subscript> nanohybrid was characterized using sophisticated analytical techniques such as transmission electron microscopy, X-ray diffraction analysis, energy-dispersive X-ray analysis, X-ray photoelectron spectroscopy, and so forth. The CeO <subscript>2</subscript> -SnO <subscript>2</subscript> nanohybrid-based sensor exhibited a strong response toward CO gas at room temperature. Under a low concentration (3 ppm) of CO gas, the CeO <subscript>2</subscript> -SnO <subscript>2</subscript> sensing material showed an excellent response time of 21.1 s for 90% of the response was achieved with a higher recovery time of 59.6 s. The nanohybrid sensor showed excellent low-concentration (1 ppm) sensing behavior which is ∼6.7 times higher than that of the pristine SnO <subscript>2</subscript> sensors. The synergistically enhanced sensing properties of CeO <subscript>2</subscript> -SnO <subscript>2</subscript> nanohybrid-based sensors were discussed from the viewpoint of the CeO <subscript>2</subscript> -SnO <subscript>2</subscript> n-n heterojunction and the effect of oxygen vacancies. Furthermore, the SnO <subscript>2</subscript> -CeO <subscript>2</subscript> nanoheterojunction showed luminescence centers and prolonged electron-hole recombination, thereby resulting in quenching of luminescence in the presence of arsenate ions. The photoluminescence of CeO <subscript>2</subscript> -SnO <subscript>2</subscript> is sensitive to the arsenate ion concentration in water and can be used for sensing arsenate with a limit of detection of 4.5 ppb in a wide linear range of 0 to 100 ppb.<br />Competing Interests: The authors declare no competing financial interest.<br /> (© 2022 The Authors. Published by American Chemical Society.)
Details
- Language :
- English
- ISSN :
- 2470-1343
- Volume :
- 7
- Issue :
- 23
- Database :
- MEDLINE
- Journal :
- ACS omega
- Publication Type :
- Academic Journal
- Accession number :
- 35721907
- Full Text :
- https://doi.org/10.1021/acsomega.2c02414