Zobrazeno 1 - 6
of 6
pro vyhledávání: '"Márcio Roberto de Freitas"'
Autor:
Daniel Coelho do Amaral, Alley Michael da Silva Procópio, Isabela Cristina Fernandes Vaz, Ana Cristina Tolentino Cabral, Márcio Roberto de Freitas, Mercês Coelho da Silva, Francisco Moura Filho
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8661387caac1e8db0f0385108f821bd6
https://doi.org/10.22533/at.ed.8662214096
https://doi.org/10.22533/at.ed.8662214096
Publikováno v:
Ceramics International. 46:29271-29281
In the present work, for the first time in literature, raw iron ore tailings (IOTs) were used as catalysts for the synthesis of carbon nanomaterials (CNMs) by the chemical vapor deposition method (CVD) in a fixed-bed reactor. The reaction parameters
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0883ad4143e71b2c2ce39005fea5dd51
https://doi.org/10.1016/j.ceramint.2020.08.101
https://doi.org/10.1016/j.ceramint.2020.08.101
Autor:
F. Nakagomi, Ernesto Soares Freitas Neto, Fabrício Vieira de Andrade, Sarah Espinoza Cerruti, Márcio Roberto de Freitas, Guilherme Oliveira Siqueira
Publikováno v:
Chemical Physics Letters. 729:37-41
Microwave Assisted Combustion technique was employed to prepare higly stable niobium pentoxide - Nb2O5 - nanoparticles using ammonium niobium oxalate as precursor, ammonium nitrate as oxidant and urea as fuel. The synthetized sample has showed good r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::29f9fdd071a478a30c2280825a6f20b6
https://doi.org/10.1016/j.cplett.2019.05.003
https://doi.org/10.1016/j.cplett.2019.05.003
Autor:
Fabrício Vieira de Andrade, Jesús Nuncira, Geraldo M. de Lima, Guilherme Oliveira Siqueira, Márcio M. Lage, Márcio Roberto de Freitas, Ana B. de Oliveira
Publikováno v:
Journal of Environmental Chemical Engineering. 9:106232
The reaction of Mn(NO3)2, Fe(NO3)3 and citric acid assisted by microwave allowed the preparation of nanoparticles of MnFe2O4. The diffraction patterns were assigned to the cubic phase and the material crystallize in the space group Fd-3m ( O h 7 , n
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0e132e9f6c8c54ee1a8e914f05499be2
https://doi.org/10.1016/j.jece.2021.106232
https://doi.org/10.1016/j.jece.2021.106232
Autor:
Thales Henrique Resende Silveira, Alley Michael da Silva Procópio, Ana Cristina Tolentino Cabral, Márcio Roberto de Freitas, Francisco Moura Filho, Mercês Coelho da Silva, Jaqueline do Carmo Lima Carvalho, Aislan Lúcio Valério, Isabela Cristina Fernandes Vaz
Publikováno v:
Materials Letters. 276:128224
The work demonstrates an easy and simple method for obtaining a TiO2 porous ceramic coated with a CeO2 thin film (COTF) on the surface. Replica technique used a 30 PPI polyurethane sponge and TiO2 ceramic suspension. Dip coating technique was used to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::24c869c390bb6566e9b9b92e7e442b6f
https://doi.org/10.1016/j.matlet.2020.128224
https://doi.org/10.1016/j.matlet.2020.128224
Autor:
Marcio Roberto de Freitas, Guilherme Lisboa de Gouveia, Leonardo José Dalla Costa, Adilson Jesus Aparecido de Oliveira, Ruth Herta Goldschmidt Aliaga Kiminami
Publikováno v:
Materials Research, Vol 19, Iss suppl 1, Pp 27-32 (2016)
Abstract Nanoparticles nickel-doped cobalt ferrites [NixCo1-xFe2O4 (x = 0.0, 0.25, 0.50, 0.75 and 1.0 of Ni2+)] were prepared by the microwave combustion synthesis, using a stoichiometric mixture of metal nitrates and urea as the oxidizer and fuel to
Externí odkaz:
https://doaj.org/article/505af4728eda42bb80cab49e8a21ed7a