Výsledky vyhledávání - "Renata Figueredo Martins"

Akademický článek

Estudos fotoluminescentes em compostos de íons terras raras coordenados por um derivado carbazólico Photoluminescence studies in rare earth ions coordinated by a carbazolic derivative

Autor: Renata Figueredo Martins, Cláudio Roberto Neri, Paulo Cesar de Sousa Filho, Osvaldo Antonio Serra, Kleber Thiago de Oliveira

Publikováno v: Química Nova, Vol 33, Iss 10, Pp 2118-2123 (2010)

[RE(czb)3(H2O)2] complexes (where RE = Eu3+, Tb3+, Gd3+; and czb = 4-(9H-carbazol-9-yl)benzoato) have been synthesized and characterized. The Gd3+ complex was used to determine the triplet state energy of the czb ligand. Photoluminescence measurement

Externí odkaz: https://doaj.org/article/79fb7551ce2843479402368dd0f4d7bb

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Ru-doped ceria–zirconia mixed oxides catalyze soot combustion

Autor: Rodrigo Ferreira Silva, Leandro F. Nascimento, P. C. de Sousa Filho, Renata Figueredo Martins, Osvaldo Antonio Serra

Publikováno v: Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP

We used ceria-based catalysts to reduce the soot combustion temperature from 600 °C to values included in the operation range of diesel exhausts (270–400 °C). We synthesized CeO2–ZrO2 by the sol–gel method and effectively deposited the mixed

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d5b15574b8f23a39d08759276356fdc1
https://doi.org/10.1007/s11144-013-0636-4

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Transparent UV-absorbers thin films of zinc oxide: Ceria system synthesized via sol–gel process

Autor: Juliana Fonseca de Lima, Renata Figueredo Martins, Osvaldo Antonio Serra

Publikováno v: Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP

Transparent nanostructure ZnO:CeO 2 and ZnO thin films to use as solar protector were prepared by non-alkoxide sol–gel process and deposited on boronsilicate glass substrate by dip-coating technique and then heated at 300–500 °C. The films were

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d0460b5884c280a353411dad2ae7ea2a
https://doi.org/10.1016/j.optmat.2012.06.016

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Luminescence in Colorless, Transparent, Thermally Stable Thin Films of Eu3+ and Tb3+ β-diketonates in Hybrid Inorganic–Organic Zinc-based Sol–Gel Matrix

Autor: Rogéria Rocha Gonçalves, Osvaldo Antonio Serra, Rodrigo Ferreira Silva, Renata Figueredo Martins

Publikováno v: Journal of Fluorescence. 20:739-743

Luminescent zinc-based hybrid inorganic-organic films with rare-earth (RE) complexes have been prepared using a non-alkoxide sol-gel process. The films were fabricated by the dip-coating method starting from zinc acetate dihydrate, rare earth chlorid

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0c101473b6ec62637ba1376e3de74abd
https://doi.org/10.1007/s10895-010-0616-2

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Thin film of ZnAl2O4:Eu3+ synthesized by a non-alkoxide precursor sol-gel method

Autor: Renata Figueredo Martins, Osvaldo Antonio Serra

Publikováno v: Journal of the Brazilian Chemical Society. 21:1395-1398

Filmes de aluminato de zinco dopados com europio (ZnAl2O4:Eu3+) foram preparados pelo metodo sol-gel usando precursores nao-alcoxidos em meio etanolico atraves da tecnica de dip-coating. Os espectros de fotoluminescencia do filme aquecido a 500 oC ap

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e8a60a43185d60f22c24b96e702eb3e6
https://doi.org/10.1590/s0103-50532010000700028

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ZnO:CeO2-based nanopowders with low catalytic activity as UV absorbers

Autor: Cláudio Roberto Neri, Osvaldo Antonio Serra, Juliana Fonseca de Lima, Renata Figueredo Martins

Publikováno v: Applied Surface Science. 255:9006-9009

Ultrafine systems of zinc oxide and cerium oxide for use as ultraviolet filter were synthesized by a non-alkoxide sol–gel process at different temperatures, to obtain solid materials (40 and 70 °C), that were characterized by X-ray diffraction, sc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7a98f0e8a3d135c12cb59661d4992ce2
https://doi.org/10.1016/j.apsusc.2009.06.071

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Catalytic combustion of soot over ceria-zinc mixed oxides catalysts supported onto cordierite

Autor: Renata Figueredo Martins, Leandro F. Nascimento, Osvaldo Antonio Serra, Rodrigo Ferreira Silva

Publikováno v: Journal of environmental sciences (China). 26(3)

Modified substrates as outer heterogeneous catalysts was employed to reduce the soot generated from incomplete combustion of diesel or diesel/biodiesel blends, a process that harms the environment and public health. The unique storage properties of c

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0e3fd71c97b3f43d02880fb801529779
https://pubmed.ncbi.nlm.nih.gov/25079283

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Photoluminescence studies in rare earth ions coordinated by a carbazolic derivative

Autor: Cláudio Roberto Neri, Kleber T. de Oliveira, Renata Figueredo Martins, Paulo C. de Sousa Filho, Osvaldo Antonio Serra

Publikováno v: Química Nova v.33 n.10 2010
Química Nova
Sociedade Brasileira de Química (SBQ)
instacron:SBQ
Química Nova, Volume: 33, Issue: 10, Pages: 2118-2123, Published: 2010

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0f51574aa4b7fc30324bd9d844177623
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422010001000022

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