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Waldir Avansi
Researcher at Federal University of São Carlos
Publications - 57
Citations - 2004
Waldir Avansi is an academic researcher from Federal University of São Carlos. The author has contributed to research in topics: Photocatalysis & Photoluminescence. The author has an hindex of 23, co-authored 56 publications receiving 1592 citations. Previous affiliations of Waldir Avansi include Sao Paulo State University.
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Journal ArticleDOI
Cluster Coordination and Photoluminescence Properties of alpha-Ag2WO4 Microcrystals
L. S. Cavalcante,Marcio Aurélio Pinheiro Almeida,Waldir Avansi,Ricardo L. Tranquilin,Elson Longo,Elson Longo,N. C. Batista,Valmor Roberto Mastelaro,M. Siu Li +8 more
TL;DR: The initial research to obtain hexagonal rod-like elongated silver tungstate (α-Ag(2)WO(4)) microcrystals by different methods and to study their cluster coordination and optical properties found them to have an orthorhombic structure.
Journal ArticleDOI
Controlled synthesis of BiVO4 photocatalysts: Evidence of the role of heterojunctions in their catalytic performance driven by visible-light
Osmando F. Lopes,Osmando F. Lopes,Kele T. G. Carvalho,André E. Nogueira,Waldir Avansi,Caue Ribeiro +5 more
TL;DR: In this article, the role of these heterojunctions in charge separation (electron/hole) remains unclear, and the authors studied these aspects in monoclinic/tetragonal BiVO4 (m-BiVO4/t-BiVo4) heterostructures, which was chosen as an active material model under visible irradiation.
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Vanadium Pentoxide Nanostructures: An Effective Control of Morphology and Crystal Structure in Hydrothermal Conditions
TL;DR: In this article, a systematic study was made of the synthesis of V2O5·nH2O nanostructures, whose morphologies, crystal structure, and amount of water molecules between the layered structures were regulated by stric...
Journal ArticleDOI
A novel ozone gas sensor based on one-dimensional (1D) α-Ag2WO4 nanostructures
Luís F. da Silva,Ariadne C. Catto,Waldir Avansi,Laécio S. Cavalcante,Juan Andrés,Khalifa Aguir,Valmor Roberto Mastelaro,Elson Longo +7 more
TL;DR: Electrical resistance measurements proved the efficiency of α-Ag₂WO₄ nanorod-like structures, which rendered good sensitivity even for a low ozone concentration, a fast response and a short recovery time at 300 °C, demonstrating great potential for a variety of applications.
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Potentiated electron transference in α-Ag2WO4 microcrystals with Ag nanofilaments as microbial agent.
Valeria M. Longo,Camila Cristina de Foggi,Mateus M. Ferrer,Amanda F. Gouveia,Rafaela S. Andre,Waldir Avansi,Carlos Eduardo Vergani,Ana Lucia Machado,Juan Andrés,Laécio S. Cavalcante,Antônio Carlos Hernandes,Elson Longo +11 more
TL;DR: Results reveal that both AWO and AWO:Ag solutions have bacteriostatic and bactericidal effects, but the irradiated sample is more efficient; i.e., a 4-fold of the MRSA planktonic cells as compared to the nonirradiated sample was observed.