Zobrazeno 1 - 10
of 20
pro vyhledávání: '"J.D.G. Fernandes"'
Autor:
J.D.G. Fernandes, V. G. Oliveira, D. K. S. Gomes, Anne M.G. Pedrosa, Patrícia Mendonça Pimentel, Dulce Maria de Araújo Melo
Publikováno v:
Cerâmica. 52:245-248
No presente trabalho estuda-se a síntese, caracterização e propriedades fotoluminescentes de sistemas contendo óxidos de lantânio, cério e níquel. Estes materiais foram preparados pelo método dos precursores poliméricos, calcinados na faixa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::be90b127b176d17de0ceb7f6241241ad
https://doi.org/10.1590/s0366-69132006000400005
https://doi.org/10.1590/s0366-69132006000400005
Autor:
Antonio Eduardo Martinelli, Dulce Maria de Araújo Melo, Marcelo J. B. Souza, L.B. Zinner, J.D.G. Fernandes, A. M. Garrido Pedrosa, Antonio S. Araujo
Publikováno v:
Repositório Institucional da UFRN
Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN
Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN
The objective of this work is to report the characterization and catalytic behavior of Co3O4, CeO2, and Co3O4–CeO2 catalysts in the C6–C7 n-alkanes combustion. X-ray diffraction indicated that crystalline oxides of Co3O4 and CeO2 are obtained by
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fcf4c6b599cecfa7e92c11cddd0c8607
https://doi.org/10.1016/s1293-2558(03)00089-x
https://doi.org/10.1016/s1293-2558(03)00089-x
Autor:
Dulce Maria de Araújo Melo, Antonio O. S. Silva, Z.L. Santos, D. K. S. Gomes, Clodomiro Alves, J.D.G. Fernandes, Z. R. Silva, L.B. Zinner
Publikováno v:
Journal of Solid State Chemistry. 171:195-200
Lanthanum and neodymium nickelate (LaxNd1� xNiO3� d) with x equal to 1.0, 0.9, 0.7 and 0.5 were prepared with molar ratios of 1:1.5 and 1:3. The resins were heated at 3001C for 2 h and then calcinated at 8001C for 12 h. The resulting powders were
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7c5c43dd375222a752616a35ce1b7f5b
https://doi.org/10.1016/s0022-4596(02)00208-6
https://doi.org/10.1016/s0022-4596(02)00208-6
Autor:
Marcelo J. B. Souza, Dulce Maria de Araújo Melo, Antonio S. Araujo, J.D.G. Fernandes, Anne M.G. Pedrosa
Publikováno v:
Reaction Kinetics and Catalysis Letters. 79:391-396
The present study reports the catalytic behavior of Co3O4-CeO2 in the oxidation of n-heptane. The results obtained showed that the catalyst give good activity in n-heptane oxidation with high selectivity to carbon dioxide.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4284a5854766ce3a743de9364fa82e8e
https://doi.org/10.1023/a:1024562924637
https://doi.org/10.1023/a:1024562924637
Autor:
L.B. Zinner, J.D.G. Fernandes, C Alves Júnior, Z. R. Silva, Elson Longo, J.A.P da Costa, C.M Salustiano, D.M Araújo Melo
Publikováno v:
Journal of Alloys and Compounds. 344:157-160
Nanostructured materials with perovskite structure have been extensively studied in the last few years due to their potential for a variety of applications. In the present study NdNiO3 was obtained from polymeric precursors, at a temperature of 800
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::544149dcd385deaf502b5cfe9086fda6
https://doi.org/10.1016/s0925-8388(02)00357-2
https://doi.org/10.1016/s0925-8388(02)00357-2
Autor:
Elson Longo, Clodomiro Alves, M. I. B. Bernardi, Edson R. Leite, Z. R. Silva, Dulce Maria de Araújo Melo, J.D.G Fernandes, Carlos A. Paskocimas
Publikováno v:
ResearcherID
Photoluminescence (PL) at room temperature has been achieved in amorphous powders of the YNiO3 and La0.5Nd0.5NiO3 systems. They were prepared by the polymeric precursor method (PPM). The energy position of maximum PL emission and the intensity showed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8e0dbafc1eb836a83a81e6f2119c111f
https://doi.org/10.1016/s0167-577x(02)00446-9
https://doi.org/10.1016/s0167-577x(02)00446-9
Autor:
Z. R. Silva, J.D.G Fernandes, Maria Inês Basso Bernardi, Antonio Eduardo Martinelli, M. Cerqueira, L.B. Zinner, Elson Longo, C Alves Júnior, Dulce Maria de Araújo Melo, C.M Salustiano
Publikováno v:
Repositório Institucional da UFRN
Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN
Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN
LaNiO 3 powders were prepared from polymeric precursors. The material was calcinated either under flowing oxygen or in air at temperatures ranging from 300 to 800 °C. The formation of new phases upon calcination was investigated using X-ray diffract
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::831da30d47e2e7e942de8eebe9e0840e
https://doi.org/10.1016/s0167-577x(01)00528-6
https://doi.org/10.1016/s0167-577x(01)00528-6
Autor:
Maria Inês Basso Bernardi, Marcus Antônio de Freitas Melo, J.D. Cunha, J.D.G Fernandes, Dulce Maria de Araújo Melo, Antonio Eduardo Martinelli
Publikováno v:
Repositório Institucional da UFRN
Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN
Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN
CoAl 2 O 4 powder was obtained from a mixture of Co and Al oxalates at a ratio of 1:8 (Co:Al). The material was calcinated at different temperatures, established from TG data, and characterized using FTIR spectroscopy, X-ray diffraction, BET surface
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b1de53be1271ae6a6387607ede04a70b
https://repositorio.ufrn.br/handle/123456789/31454
https://repositorio.ufrn.br/handle/123456789/31454
Autor:
L.B. Zinner, H.E.B. da Silva, J.D.G. Fernandes, D.M. Araújo Melo, C.P.F. dos Santos, Z.R. da Silva
Publikováno v:
Scopus-Elsevier
Compounds between trifluoromethanesulphonates and HMPA were prepared by reaction of the salt and ligand dissolved in ethanol and acetone, respectively, on water bath. The compounds are characterized by CHN, IR and TG. From solution calorimetry and ap
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9e7536b5e0daf4c54b2d1bda2b952904
http://www.scopus.com/inward/record.url?eid=2-s2.0-0039444285&partnerID=MN8TOARS
http://www.scopus.com/inward/record.url?eid=2-s2.0-0039444285&partnerID=MN8TOARS
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