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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

UV-enhanced ozone gas sensing response of ZnO-SnO2 heterojunctions at room temperature

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Author(s):
da Silva, Luis F. ; M'Peko, J. -C. ; Catto, Ariadne C. ; Bernardini, Sandrine ; Mastelaro, Valmor R. ; Aguir, Khalifa ; Ribeiro, Caue ; Longo, Elson
Total Authors: 8
Document type: Journal article
Source: SENSORS AND ACTUATORS B-CHEMICAL; v. 240, p. 573-579, MAR 2017.
Web of Science Citations: 25
Abstract

The sensitivity of ZnO-SnO2 heterojunctions to ozone gas was investigated in this work, the two-phase materials of which were prepared via a hydrothermal route, resulting in nanocomposites in which the formation of heterojunctions was confirmed by microscopy analyses. While the sensing effectiveness of these materials is currently verified for application above 150 degrees C, these temperatures are here drastically reduced to room temperature by considering sensing activity under continuous UV irradiation, even for ozone concentrations as low as 20 ppb. This approach resulted in a fast sensing response, a short recovery time and a good selectivity compared to other gases, demonstrating a great potential of such heterojunctions for applications in environmental monitoring devices. (C) 2016 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 12/15170-6 - Synthesis and characterization of ZnO thin and thick films : application as gas sensors
Grantee:Ariadne Cristina Catto
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
Grantee:Elson Longo da Silva
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC
FAPESP's process: 15/20124-1 - Nanostructured semiconductor oxides: nonaqueous synthesis and their gas sensing properties
Grantee:Luís Fernando da Silva
Support type: Scholarships abroad - Research Internship - Post-doctor
FAPESP's process: 13/09573-3 - Synthesis and characterization of the ZnO/SnO2 heterostructures obtained by hydrothermal method: gas sensor applications
Grantee:Luís Fernando da Silva
Support type: Scholarships in Brazil - Post-Doctorate