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Potential of Nb2O5 nanofibers in photocatalytic degradation of organic pollutants
Paris, Elaine Cristina
Influence of terbium (III) ions on the photocatalytic activity of TiO2 and CeO2...
de Campos, Mariana Bizari Machado [UNESP]; Cebim, Marco Aurélio [UNESP]; Meirelles, Mariana Rodrigues; Paris, Elaine CristinaMade available in DSpace on 2021-06-25T10:21:09Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-01-01; This study reports the preparation of TiO2 and CeO2 doped with different quantities of terbium and discusses the influence of this dopant on the photocatalytic activity of the semiconductors, with respect to the degradation of methylene blue, under ultraviolet and solar radiations. The oxides obtained w...
Imobilização de lipase de aspergillus niger C em nanoparticulas magnéticas de h...
Santos, T. C.; Viana, J. S; Terzi, Selma da Costa; Paris, Elaine Cristina; Cabral, Lourdes Maria Corrêa; Brígida, Ana Iraidy SantaO presente trabalho teve por objetivo desenvolver um método para imobilizar lipase de Aspergillus niger C em nanopartículas magnéticas de hidroxiapatita e óxido de ferro (1:1). E a caracterização do mesmo também foi realizada. A imobilização foi efetuada por meio de processo adsortivo. A cinética de adsorção mostrou equilíbrio a partir de 4h de imobilização para a atividade do derivado, com rendimento máximo em...
Evaluation of the catalytic activity of oxide nanoparticles synthesized by the ...
Nascimento, Gabriela Santilli do; Mambrini, Giovanni Pimenta; Paris, Elaine Cristina; Peres, Juliano Aurelio; Colnago, Luis Alberto; Ribeiro, CaueThis paper shows a comparison between different nanostructured oxides, obtained by polymeric precursor method, regarding their activity for biodiesel conversion from oil–methanol mixtures. The basicity/acidity and surface area (SA) of the oxides were taken in account to analyze the catalytic activity in the transesterification reaction. The temperature dependence for the heterogeneous catalysts was analyzed, wh...
Estudo de pós cerâmicos de PbTiO3 utilizando-se o método dos precursores polimé...
Paris, Elaine CristinaUniversidade Federal de Minas Gerais; THE STUDY OF PbTiO3 (PT) CERAMIC POWDERS USING THE POLYMERIC PRECURSOR METHOD was started by the preparation of a precursor solution of metallic cations. Citric acid was used as quelation agent and ethylene glycol as esterification and polymerization agent. This solution was submitted to thermal treatment at temperatures about 300°C for the pyrolysis of the obtained polyest...
Estudo da Influência do Sm e Er em Cerâmicas de PbTiO3.
Paris, Elaine CristinaUniversidade Federal de Minas Gerais; In this work, it was obtained powders and thin films of (Pb1-xLnx)TiO3, Ln = Sm and Er, using a chemical method of synthesis, polymeric precursor method (Pechini). In this way, the synthesis conditions were optimized in order to minimize the formation of secondary phases. (Pb1-xSmx)TiO3, PST and (Pb1-xErx)TiO3, PET powders, with x varying from 0.01 to 0.1, were obtained in ...
Insight into magnetite nanoparticle phase evolution in solvothermal synthesis t...
Silva, F. B. F.; Paris, Elaine Cristina; Costa, Geraldo Magela da; Ribeiro, C.This paper presents the development and optimization of the synthesis of magnetic nanoparticles composed of iron oxides by a solvothermal method with benzyl alcohol using iron(III) chloride hexahydrate as a metallic precursor in the substitution of iron(III) acetylacetonate. The synthesis parameters were studied and varied to obtain a high yield of magnetite. Metallic iron was evaluated as a reducing agent and ...