One-Dimensional V2O5/TiO2 Heterostructures for Chemiresistive Ozone Sensors

Author(s)

Avansi, Jr., Waldir ^[1] ; Catto, Ariadne C. ^[1] ; da Silva, Luis F. ^[1] ; Fiorido, Tomas ^[2] ; Bernardini, Sandrine ^[2] ; Mastelaro, Valmor R. ^[3] ; Aguir, Khalifa ^[2] ; Arenal, Raul ^{[4, 5, 6]}

Affiliation

^[1] Univ Fed Sao Carlos, UFSCar, Dept Phys, Lab Nanostruct Multifunct Mat, BR-13565905 Sao Carlos, SP - Brazil

^[2] Univ Toulon & Var, Aix Marseille Univ, CNRS, IM2NP, F-13013 Marseille - France

^[3] Univ Sao Paulo, BR-13566590 Sao Carlos, SP - Brazil

^[4] Univ Zaragoza, Inst Nanosci Aragon, Lab Microscopias Avanzadas, Zaragoza 50018 - Spain

^[5] ARAID, Zaragoza 50018 - Spain

^[6] Univ Zaragoza, CSIC, Inst Ciencias Mat Aragon, E-50009 Zaragoza - Spain

• Document type: Journal article
• Source: ACS APPLIED NANO MATERIALS; v. 2, n. 8, p. 4756-4764, AUG 2019.
• Web of Science Citations: 1

Abstract

Over the last decades, there has been considerable interest in the synthesis of one-dimensional (1D) metal oxide nanostructures that can be used in gas sensor devices. Heterostructures, obtained by a combination of different semiconductor nanomaterials with different band energies, have been extensively studied in order to enhance their gas-sensing performance. In this context, our present study focuses on the investigation of chemiresistive-sensing capabilities of a combination of TiO2 nanoparticles and V2O5 nanowires obtained via hydrothermal treatment of the peroxometal complex. The formation of V2O5/TiO2 heterostructures was characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) measurements. This study also proposes an efficient approach to produce 1D V2O5/TiO2 heterostructures with a good range of detection (0.09-1.25 ppm) and remarkable ozone-sensing properties related to repeatability and selectivity. (AU)

• FAPESP's process: 17/18649-4 - 2017 MRS Fall Meeting and Exhibit
• Grantee: Waldir Avansi Junior
• Support Opportunities: Research Grants - Meeting - Abroad
• FAPESP's process: 13/17639-4 - Obtainment of nanostructured semiconductors: correlation of the photocatalytic properties to their structural characteristic
• Grantee: Waldir Avansi Junior
• Support Opportunities: Regular Research Grants
• 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
• FAPESP's process: 17/12437-5 - Preparation and characterization of semiconductor nanoheterojunctions applied in photoactived gas sensors
• Grantee: Luís Fernando da Silva
• Support Opportunities: Regular Research Grants