M
Maya Penha
Researcher at Federal University of São Carlos
Publications - 5
Citations - 150
Maya Penha is an academic researcher from Federal University of São Carlos. The author has contributed to research in topics: Photoluminescence & Rietveld refinement. The author has an hindex of 4, co-authored 5 publications receiving 98 citations.
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Journal ArticleDOI
ZnWO4 nanocrystals: synthesis, morphology, photoluminescence and photocatalytic properties.
Paula F.S. Pereira,Amanda F. Gouveia,Marcelo Assis,R. C. de Oliveira,Ivo M. Pinatti,Maya Penha,Rodrigues Gonçalves,Lourdes Gracia,Juan Andrés,Elson Longo +9 more
TL;DR: The ZnWO4 nanocrystals obtained at 160 °C exhibited excellent photodegradation of Rhodamine under ultraviolet light irradiation, which was found to be related to the surface energy and the types of clusters formed on the surface of the catalyst.
Journal ArticleDOI
Blue and red light photoluminescence emission at room temperature from CaTiO3 decorated with α-Ag2WO4
Mayara Mondego,Regiane Cristina de Oliveira,Maya Penha,Máximo Siu Li,Máximo Siu Li,Elson Longo +5 more
TL;DR: In this paper, the X-ray diffraction peaks of the synthesized microcrystals were well indexed to the orthorhombic phase for all the samples, and two morphologies were observed by field-emission scanning electron microscopy (FE-SEM).
Journal ArticleDOI
alpha- and beta-AgVO3 polymorphs as photoluminescent materials: An example of temperature-driven synthesis
Regiane Cristina de Oliveira,Mayara Mondego Teixeira,João Paulo de Campos da Costa,Maya Penha,Eric Mark Francisco,Jussara Soares da Silva,Máximo Siu Li,Elson Longo,Lourdes Gracia,Juan Andrés +9 more
TL;DR: In this paper, a simple procedure was proposed to control the reversible transformation between the crystalline polymorphs α-AgVO3 and β-AgVVO3 in order to achieve photoluminescence emission (PL) performance.
Journal ArticleDOI
Structure, optical properties, and photocatalytic activity of α-Ag2W0.75Mo0.25O4
Maya Penha,Amanda F. Gouveia,Mayara Mondego Teixeira,R. C. de Oliveira,Marcelo Assis,Julio R. Sambrano,F. Yokaichya,Clayane C. Santos,Rodrigues Gonçalves,M. Siu Li,Miguel A. San-Miguel,Juan Andrés,Elson Longo +12 more
TL;DR: In this article, the synthesis of α-Ag2W0.75Mo0.25O4 using a coprecipitation method followed by microwave irradiation for different times was described.
Journal ArticleDOI
Effect of metallic Ag growth on the electrical resistance of 3D flower-like Ag4V2O7 crystals
Regiane Cristina de Oliveira,S. M. Zanetti,Marcelo Assis,Maya Penha,Mayara Mondego,Mario Cilense,Elson Longo,Laécio S. Cavalcante +7 more
TL;DR: In this paper, the growth of metallic Ag nanoparticles on the surfaces of Ag4V2O7 crystals were studied by transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (EDXS).