Carbon nanostructures-modified expanded vermiculites produced by chemical vapor deposition from ethanol

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MetadadosDescriçãoIdioma
Autor(es): dc.creatorPurceno, Aluir Dias-
Autor(es): dc.creatorBarrioni, Breno Rocha-
Autor(es): dc.creatorDias, Anderson-
Autor(es): dc.creatorCosta, Geraldo Magela da-
Autor(es): dc.creatorLago, Rochel Montero-
Autor(es): dc.creatorMoura, Flávia Cristina Camilo-
Data de aceite: dc.date.accessioned2019-11-06T13:24:03Z-
Data de disponibilização: dc.date.available2019-11-06T13:24:03Z-
Data de envio: dc.date.issued2012-06-21-
Data de envio: dc.date.issued2012-06-21-
Data de envio: dc.date.issued2011-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/123456789/914-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/554603-
Descrição: dc.descriptionIn this work, chemical vapor deposition using ethanol and FeMo catalysts at 600, 700, 800 and 900 °C was used to modify the surface of expanded vermiculite (EV). Scanning electron microscopy, Raman spectroscopy, X-ray diffraction, Mössbauer spectra, N2-BET surface areas, and carbon elemental analyses suggested that the FeMo catalyst promoted 2–3% growth of carbon in different forms, mainly nanofibers, on the EV surface. The amount of 2–3% carbon produced by ethanol/CVD process on EV produced a 500% increase in the absorption of soybean, diesel and engine oil, with a concomitant decrease on water absorption. These results were discussed in terms of a hydrophobization of the EV surface by the carbon structures and a “sponge-like” effect due to the entangled nanofibers structure, as it was observed by microscopy, and an increase of N2-BET surface area from 3 m2 g−1 for EV up to 21 m2 g–1 for the ethanol CVD-treated EV.-
Idioma: dc.languageen-
Direitos: dc.rightsO Periódico Applied Clay Science concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3333160138706-
Título: dc.titleCarbon nanostructures-modified expanded vermiculites produced by chemical vapor deposition from ethanol-
Aparece nas coleções:Repositório Institucional - UFOP

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