Towards carbon monoxide sensors based on europium doped cerium dioxide

Author(s)

Ortega, P. P. ^[1] ; Rocha, L. S. R. ^[1] ; Cortes, J. A. ^[1] ; Ramirez, M. A. ^[1] ; Buono, C. ^[2] ; Ponce, M. A. ^[2] ; Simoes, A. Z. ^[1]

Affiliation

^[1] Sao Paulo State Univ UNESP, Sch Engn Guaratingueta, Ave Dr Ariberto Pereira da Cunha 333, BR-12516410 Guaratingueta, SP - Brazil

^[2] Univ Mar Plata UNMdP, Natl Res Council CONICET, Inst Mat Sci & Technol INTEMA, Ave Juan B Justo 4302, RA-7600 Mar Del Plata - Argentina

• Document type: Journal article
• Source: Applied Surface Science; v. 464, p. 692-699, JAN 15 2019.
• Web of Science Citations: 4

Abstract

Ce1-(3/4)xEuxO2 (x = 0.00 and x = 0.08) thick films were prepared from nanoparticles synthesized by the microwave-assisted hydrothermal route, aiming their application as a carbon monoxide sensing material to prevent deaths caused by this highly toxic gas. XRD analysis revealed that the nanopowders are free from secondary phases and crystallize in the fluorite cubic structure, which is confirmed by Raman spectroscopy. The Eu-doped ceria film presented much higher response (S) values than pure ceria, demonstrating the higher sensitivity of the doped system to carbon monoxide, especially at 400 degrees C. Electrical measurements under different atmospheres revealed a remarkably fast carbon monoxide response time for the Eu-doped film when compared with the pure sample, proving that the introduction of europium cations in the ceria lattice as dopants has a positive effect on the carbon monoxide sensing properties. (AU)

• FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
• Grantee: Elson Longo da Silva
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC