Zobrazeno 1 - 8
of 8
pro vyhledávání: '"Antônio S. Araujo"'
Autor:
Geraldo E. Luz Jr, Ana C. R. Melo, Stevie H. Lima, Antônio S. Araujo, Valter J. Fernandes Jr.
Publikováno v:
Química Nova, Vol 33, Iss 8, Pp 1646-1648 (2010)
La-incorporated SBA-15 mesopourous molecular sieves (LaSBA-15) were directly synthesized with aim to convert ethanol to ethylene. The samples were characterized by XRD, XRF, nitrogen sorption and acidity, by thermodesorption of n-buthylamine. The res
Externí odkaz:
https://doaj.org/article/25129d92ee184a09b90cd0852585b292
Autor:
Joana M. F. Barros, Glauber J. T. Fernandes, Marcio D. S. Araujo, Dulce M. A. Melo, Amanda D. Gondim, Valter J. Fernandes, Antonio S. Araujo
Publikováno v:
Nanomaterials, Vol 13, Iss 3, p 382 (2023)
The nanostructured lanthanide-silica materials of the Ln–SiO2 type (Ln = La, Ce, Pr, Nd, Eu, Gd, Dy, Yb, Lu) were synthesized by the hydrothermal method at 100 °C, using cetyltrimethylammonium as a structural template, silica gel and sodium silica
Externí odkaz:
https://doaj.org/article/6747efe76b3b4dc2bb13bf0ef522b7af
Publikováno v:
Eclética Química, Vol 31, Iss 2, Pp 39-43 (2018)
The dehydration kinetic of Yb, Lu and Y 4-chlorobenzylidenepyruvate was studied by using thermogravimetry and the kinetics parameters obtained by Flynn and Wall method suggest that the dehydration step follows a first order mechanism. The activation
Externí odkaz:
https://doaj.org/article/0a11d427c97543a4b5e1bf22d3450948
Autor:
Gidiângela C. C. S. Lima, Mariele I. S. Mello, Lindiane Bieseki, Antonio S. Araujo, Sibele B. C. Pergher
Publikováno v:
Molecules, Vol 26, Iss 23, p 7366 (2021)
Silicoaluminophosphate molecular sieves of SAPO-11 type (AEL structure) were synthesized by the hydrothermal method, from the residue of a fluorescent lamp as a source or Si, Al, and P in the presence of water and di-propyamine (DPA) as an organic te
Externí odkaz:
https://doaj.org/article/13e0cc54f9f64a53ab10b747b89ac896
Autor:
Renilson O. Mapele, Antonio O. S. Silva, Marcelo J. B. Souza, Anne M. G. Pedrosa, Ana C. F. Coriolano, Glauber J. T. Fernandes, Valter J. Fernandes, Antonio S. Araujo
Publikováno v:
Applied Sciences, Vol 11, Iss 14, p 6544 (2021)
The hydrothermal synthesis of aluminophosphate molecular sieve type AlPO4-11 was processed from chemicals containing psueudobohemite, 85% phosphoric acid, water, and di-isopropylamine as templating agent. The crystallization of the samples was studie
Externí odkaz:
https://doaj.org/article/fa39983e5b4c458f83eed87c016f6389
Autor:
Vinícius P. S. Caldeira, Anne G. D. Santos, Sibele B. C. Pergher, Maria J. F. Costa, Antonio S. Araujo
Publikováno v:
Química Nova, Vol 39, Iss 3, Pp 292-297 (2016)
To understand the physicochemical properties and catalytic activity during the pyrolysis of atmospheric petroleum residue, a template-free ZSM-5 zeolite was synthesized using a direct method without additional seeds or an organic structure director a
Externí odkaz:
https://doaj.org/article/cf9d96a8125444fc8bb0f81f9573f7b5
Synthesis, Characterization, and Photonic Efficiency of Novel Photocatalytic Niobium Oxide Materials
Publikováno v:
Global Challenges, Vol 1, Iss 9, Pp n/a-n/a (2017)
Abstract The application of niobium oxides as photocatalytic materials for the removal of contaminants is scarcely reported in the literature. This work reports the methodology to synthesize four different mesoporous niobium oxide materials and the c
Externí odkaz:
https://doaj.org/article/50de88e192bf43aea635e5a5727447b4
Autor:
Marcelo J.B. Souza, Stevie H. Lima, Antonio S. Araujo, Anne M. Garrido Pedrosa, Ana C.S.L.S. Coutinho
Publikováno v:
Adsorption Science & Technology, Vol 25 (2007)
Mesoporous catalysts of MCM-41 type with different Si/Al ratios were synthesized by the hydrothermal method and characterized by X-ray diffraction, nitrogen adsorption and thermogravimetric analysis. Their acidic properties were determined via the te
Externí odkaz:
https://doaj.org/article/22c8fad3bbef4017a22ce0ac95dbca6f