Zobrazeno 1 - 7
of 7
pro vyhledávání: '"Fábio G Penha"'
Autor:
Christian Wittee Lopes, Fábio G Penha, Renata Martins Braga, Dulce Maria de Araújo Melo, Sibele B. C Pergher, Diego Ivan Petkowicz
Publikováno v:
Química Nova, Vol 34, Iss 7, Pp 1152-1156 (2011)
The major applications of organoclays are in adsorption of organic polluents. The objective of this work was the synthesis and characterization of organoclays using differents amounts of cationic surfactant hexadecyltrimethylammonium bromide. The cla
Externí odkaz:
https://doaj.org/article/b32adfba48464bfb9d750712257c65da
Autor:
Selma Calgaroto, Cléber Calgaroto, Fábio G. Penha, Sibele B. C. Pergher, Luiz Carlos A. Oliveira
Publikováno v:
Eclética Química, Vol 36, Iss 3, Pp 47-53 (2018)
In this work, the comercial zeolites ZSM-5 and Y were submitted to previous ionic change with NH4NO3, followed by the addition of Nb. The incorporation of Nb on its structure aims increasing the acidity and improved the catalyst activity of these zeo
Externí odkaz:
https://doaj.org/article/a3cfabff92ab4d9f8fb640567bf2631e
Autor:
Jean C. Merg, Franciele Rossett, Fábio G. Penha, Sibele B. C. Pergher, Diego I. Petkowicz, João H. Z. dos Santos
Publikováno v:
Química Nova, Vol 33, Iss 7, Pp 1525-1528 (2010)
This work proposes the study of heterogeneous photocatalysis using TiO2 impregnated in zeolites beta, ZSM-5, mordenite, NaXb, NaXp and NaY for the decomposition of methylene blue. The catalysts were characterized by XRD, IR, textural analyses by N2 a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doajarticles::1d219b72a277c3be26fd5c96aff8e6dc
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422010000700019
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422010000700019
Publikováno v:
Química Nova, Vol 32, Iss 7, Pp 1818-1821 (2009)
Offretite T zeolite was synthesized using different source of Si (Ludox AS-30, Ludox LS-30 and Aerosil 200 Degussa). The obtained materials were characterized by different complementary techniques: XRD, textural analysis by N2 adsorption, IV, SEM and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doajarticles::34328882366b858dcd17cf908d33b3a1
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422009000700025
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422009000700025
Publikováno v:
Química Nova, Vol 32, Iss 4, Pp 879-883 (2009)
The study consists is the application of zeolites NaX, NaY and A as builder in detergent formulations to eliminate the hardness of water. Therefore, the adsorption of ions Ca+2 and Mg+2 were evaluated, and the effect of the cleaning action of the sur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doajarticles::521b3b84ab8da4fa6bd419bbdd8cf382
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422009000400010
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422009000400010
Autor:
Álvaro L. Malvesti, Marcelo L. Mignoni, Robison P. Scherer, Fábio G. Penha, Sibele B. C. Pergher
Publikováno v:
Química Nova, Vol 32, Iss 6, Pp 1491-1494 (2009)
This paper deals with an adosrption of sulphur compounds employing zeolites containing zinc. The zeolites employed were commercial NaY and Beta. The zinc was incorporated in three levels: 0.5; 1.0 and 5%. The sulphur compounds studied were benzothiop
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doajarticles::42601a4dc1b54a686d6104604116d06f
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422009000600024
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422009000600024
Autor:
Janaina Piasson, Christian Wittee, Francine Bertella, Fábio G. Penha, Sibele B. C. Pergher, Helio C. M. Lengler
Publikováno v:
Química Nova, Vol 34, Iss 3, Pp 468-471 (2011)
Clay is often employed as a catalyst, but quartz impurities can decrease the catalytic efficiency. Fine particles of clay can be purified by flotation. We examined the cationic surfactant hexadecyltrimethylammonium bromide (HTAB), the anionic sodium
Externí odkaz:
https://doaj.org/article/44a38979d3324c4d9e03e74ca151f08c