Listar por autoría "c159229a-bcf7-4628-8648-e58d780ea0cf"
Mostrando ítems 1-8 de 8
-
Ag2WO4 as a multifunctional material: Fundamentals and progress of an extraordinarily versatile semiconductor
Gouveia, Amanda; Alvarez Roca, Roman; Guerra Macedo, Nadia; Cavalcante, Laécio Santos; Longo, Elson; San-Miguel, Miguel A.; Altomare, Angela; DA SILVA, GILMAR SILVÉRIO; Andres, Juan Elsevier (2022-11-18)Silver tungstate (Ag2WO4) based materials are intensively studied because of their unique chemical and physical properties. Ag2WO4 polymorphs present discrete and intrinsically complex architectures due to a multifaceted ... -
Facet-dependent photocatalytic and antibacterial properties of a-Ag2WO4 crystals: combining experimental data and theoretical insights
Alvarez Roca, Roman; Sczancoski, Júlio César; Nogueira, Içamira C.; Fabbro, Maria T.; Alves, H. C.; Gracia, Lourdes; Santos, Luís P. S.; De Sousa, C. P.; Andres, Juan; Luz Jr, Geraldo; Longo, Elson; Cavalcante, Laécio Santos Royal Society of Chemistry (2015-05)In this paper, we have combined the various experimental results and first-principles calculations with a new and interesting discussion to explain the photocatalytic and antibacterial activities of α-Ag2WO4 crystals, which ... -
Formation of Ag Nanoparticles on β‑Ag2WO4 through Electron Beam Irradiation: A Synergetic Computational and Experimental Study
Alvarez Roca, Roman; Gouveia, Amanda; Lemos, Pablo S.; Gracia, Lourdes; Andres, Juan; Longo, Elson American Chemical Society (2016)In the present work, a combined theoretical and experimental study was performed on the structure, optical properties, and growth of Ag nanoparticles in metastable β- Ag2WO4 microcrystals. This material was synthesized ... -
Interface matters: Design of an efficient α-Ag2WO4/Ag3PO4 photocatalyst
Barrios Trench, Aline; Alvarez Roca, Roman; Teodoro , Vinícius; da Trindade, Letícia; Machado, Thales Rafael; Teixeira, Mayara Mondego; De Souza, Daniele; Pinatti, Ivo M; Simões, Alexandre; Galvão Gobato, Yara; Andres, Juan; Longo, Elson Elsevier (2022-02-10)Heterojunction engineering of complex metal oxides is an active area of research that addresses fundamental questions in solid-state systems with broad technological applications. In this work, α-Ag2WO4/Ag3PO4 heterojunctions ... -
Selective Synthesis of α-, β-, and γ-Ag2WO4 Polymorphs: Promising Platforms for Photocatalytic and Antibacterial Materials
Alvarez Roca, Roman; Gouveia, Amanda; Foggi, Camila Cristina; Santana Lemos, Pablo; Gracia, Lourdes; da Silva, Luís; Vergani, Carlos; San-Miguel, Miguel A.; Longo, Elson; Andres, Juan American Chemical Society (2021-01-18)Silver tungstate (Ag2WO4) shows structural polymorphism with different crystalline phases, namely, orthorhombic, hexagonal, and cubic structures that are commonly known as α, β, and γ, respectively. In this work, these ... -
Surfactant-Mediated Morphology and Photocatalytic Activity of α‑Ag2WO4 Material
Guerra Macedo, Nadia; Gouveia, Amanda; Alvarez Roca, Roman; Assis, Marcelo de; Gracia, Lourdes; Andres, Juan; Leite, Edson R.; Longo, Elson American Chemical Society (2018-03)In the present work, the morphology (hexagonal rod-like vs cuboid-like) of an α-Ag2WO4 solid-state material is manipulated by a simple controlled-precipitation method, with and without the presence of the anionic surfactant ... -
Tailoring the Bactericidal Activity of Ag Nanoparticles/α-Ag2WO4 Composite Induced by Electron Beam and Femtosecond Laser Irradiation: Integration of Experiment and Computational Modeling
Guerra Macedo, Nadia; Machado, Thales Rafael; Alvarez Roca, Roman; Assis, Marcelo de; Foggi, Camila Cristina; Puerto-Belda, Verónica; Mínguez-Vega, Gladys; Rodrigues, André; San-Miguel, Miguel A.; Cordoncillo, Eloisa; Beltrán Mir, Héctor; Andres, Juan; Longo, Elson American Chemical Society (2019)In nanotechnology research, significant effort is devoted to fabricating patterns of metallic nanoparticles on the surfaces of different semiconductors to find innovative materials with favorable characteristics, such as ... -
Uncovering the metastable γ-Ag2WO4 phase: a joint experimental and theoretical study
Alvarez Roca, Roman; Lemos, Pablo S.; Gracia, Lourdes; Andres, Juan; Longo, Elson Royal Society of Chemistry (2017)The synthesis of metastable solid phases is a pivotal starting point for innovative materials research. Here, we report the synthesis by means of a precipitation method of the metastable cubic γ-Ag2WO4 phase under ambient ...