One-Dimensional V₂O₅/TiO₂ Heterostructures for Chemiresistive Ozone Sensors

Autor(es)

Avansi, Waldir, Jr. ; Catto, Ariadne C. ; da Silva, Luis F. ; Fiorido, Tomas ; Bernardini, Sandrine ; Mastelaro, Valmor R. ; Aguir, Khalifa ; Arenal, Raul

• Tipo de documento: Artigo Científico
• Fonte: ACS APPLIED NANO MATERIALS; v. 2, n. 8, p. 17-pg., 2019-08-01.

Resumo

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)

• Processo FAPESP: 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
• Beneficiário: Elson Longo da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs
• Processo FAPESP: 17/12437-5 - Preparação e caracterização de nanoheterojunções semicondutoras aplicadas como sensores resistivos de gás fotoativados
• Beneficiário: Luís Fernando da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 13/17639-4 - Obtenção de semicondutores nanoestruturados: correlação das propriedades fotocatalíticas com suas características estruturais
• Beneficiário: Waldir Avansi Junior
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 17/18649-4 - 2017 MRS Fall Meeting and Exhibit
• Beneficiário: Waldir Avansi Junior
• Modalidade de apoio: Auxílio à Pesquisa - Reunião - Exterior