Synthesis and Characterization of Chromium Silicalite
Autor(a) principal: | |
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Data de Publicação: | 1993 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFBA |
Texto Completo: | http://www.repositorio.ufba.br/ri/handle/ri/12996 |
Resumo: | Texto completo. Acesso restrito. p. 166-173 |
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Mambrim, José Silvio T.Pastore, Heloise de OliveiraDavanzo, Celso U.Vichi, Eduardo Joaquim de SouzaNakamura, OssamuVargas, HelionMambrim, José Silvio T.Pastore, Heloise de OliveiraDavanzo, Celso U.Vichi, Eduardo Joaquim de SouzaNakamura, OssamuVargas, Helion2013-09-18T17:15:44Z2013-09-18T17:15:44Z19930897-4756http://www.repositorio.ufba.br/ri/handle/ri/12996Texto completo. Acesso restrito. p. 166-173Infrared spectroscopy (mid-IR), 29Sia nd 27Alm agic angle spinning nuclear magnetic resonance (MAS-NMR), powder X-ray diffraction (PXRD), electron paramagnetic resonance (EPR), and photoacoustic spectroscopy (PAS), in combination, have produced useful information about a series of crystalline MFI-type chromium silicalite, synthesized in a fluoride medium. Aluminum is an impurity and occupies framework sites, as evaluated by the 27Al MAS-NMR. The mid-IR spectra are very similar to the zeolite ZSM-5 with the addition of a weak band at ~68c0m -l, which we tentatively assign to symmetric stretching of (Cr-0-Si), groups. The samples are crystalline materials and have expanded unit cells, as PXRD measurements pointed out. The as-synthesized sample shows a distribution of Cr sites, detected by EPR, comprising structure and channel occlusion sites; the nonstructural sites being extensively oxidized to Cr(V1) species after calcination in the presence of dioxygen. The changes in the photoacoustically measured physical properties, such as nonradiative relaxation time, the thermal diffusivity and optical absorption coefficient of both calcined and noncalcined chromium silicalite samples are also reported.Submitted by Santiago Fabio (fabio.ssantiago@hotmail.com) on 2013-09-17T18:46:28Z No. of bitstreams: 1 55555555555555.pdf: 2138002 bytes, checksum: 0f9db25e6b1b56b02befe62124b9ec02 (MD5)Approved for entry into archive by Vilma Conceição(vilmagc@ufba.br) on 2013-09-18T17:15:44Z (GMT) No. of bitstreams: 1 55555555555555.pdf: 2138002 bytes, checksum: 0f9db25e6b1b56b02befe62124b9ec02 (MD5)Made available in DSpace on 2013-09-18T17:15:44Z (GMT). No. of bitstreams: 1 55555555555555.pdf: 2138002 bytes, checksum: 0f9db25e6b1b56b02befe62124b9ec02 (MD5) Previous issue date: 1993SalvadorChemistry of Materials10.1021/cm00026a004reponame:Repositório Institucional da UFBAinstname:Universidade Federal da Bahia (UFBA)instacron:UFBASpectroscopyElectron paramagnetic resonanceSilicaliteSynthesis and Characterization of Chromium SilicaliteChemistry of Materialsinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleenginfo:eu-repo/semantics/openAccessORIGINAL55555555555555.pdf55555555555555.pdfapplication/pdf2138002https://repositorio.ufba.br/bitstream/ri/12996/1/55555555555555.pdf0f9db25e6b1b56b02befe62124b9ec02MD51LICENSElicense.txtlicense.txttext/plain1762https://repositorio.ufba.br/bitstream/ri/12996/2/license.txt1b89a9a0548218172d7c829f87a0eab9MD52TEXT55555555555555.pdf.txt55555555555555.pdf.txtExtracted texttext/plain43187https://repositorio.ufba.br/bitstream/ri/12996/3/55555555555555.pdf.txt0a46fc5de049d18a6271241931a93ff0MD53ri/129962022-07-05 14:03:48.824oai:repositorio.ufba.br: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Repositório InstitucionalPUBhttp://192.188.11.11:8080/oai/requestopendoar:19322022-07-05T17:03:48Repositório Institucional da UFBA - Universidade Federal da Bahia (UFBA)false |
dc.title.pt_BR.fl_str_mv |
Synthesis and Characterization of Chromium Silicalite |
dc.title.alternative.pt_BR.fl_str_mv |
Chemistry of Materials |
title |
Synthesis and Characterization of Chromium Silicalite |
spellingShingle |
Synthesis and Characterization of Chromium Silicalite Mambrim, José Silvio T. Spectroscopy Electron paramagnetic resonance Silicalite |
title_short |
Synthesis and Characterization of Chromium Silicalite |
title_full |
Synthesis and Characterization of Chromium Silicalite |
title_fullStr |
Synthesis and Characterization of Chromium Silicalite |
title_full_unstemmed |
Synthesis and Characterization of Chromium Silicalite |
title_sort |
Synthesis and Characterization of Chromium Silicalite |
author |
Mambrim, José Silvio T. |
author_facet |
Mambrim, José Silvio T. Pastore, Heloise de Oliveira Davanzo, Celso U. Vichi, Eduardo Joaquim de Souza Nakamura, Ossamu Vargas, Helion |
author_role |
author |
author2 |
Pastore, Heloise de Oliveira Davanzo, Celso U. Vichi, Eduardo Joaquim de Souza Nakamura, Ossamu Vargas, Helion |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Mambrim, José Silvio T. Pastore, Heloise de Oliveira Davanzo, Celso U. Vichi, Eduardo Joaquim de Souza Nakamura, Ossamu Vargas, Helion Mambrim, José Silvio T. Pastore, Heloise de Oliveira Davanzo, Celso U. Vichi, Eduardo Joaquim de Souza Nakamura, Ossamu Vargas, Helion |
dc.subject.por.fl_str_mv |
Spectroscopy Electron paramagnetic resonance Silicalite |
topic |
Spectroscopy Electron paramagnetic resonance Silicalite |
description |
Texto completo. Acesso restrito. p. 166-173 |
publishDate |
1993 |
dc.date.issued.fl_str_mv |
1993 |
dc.date.accessioned.fl_str_mv |
2013-09-18T17:15:44Z |
dc.date.available.fl_str_mv |
2013-09-18T17:15:44Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://www.repositorio.ufba.br/ri/handle/ri/12996 |
dc.identifier.issn.none.fl_str_mv |
0897-4756 |
identifier_str_mv |
0897-4756 |
url |
http://www.repositorio.ufba.br/ri/handle/ri/12996 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Chemistry of Materials |
publisher.none.fl_str_mv |
Chemistry of Materials |
dc.source.pt_BR.fl_str_mv |
10.1021/cm00026a004 |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFBA instname:Universidade Federal da Bahia (UFBA) instacron:UFBA |
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Universidade Federal da Bahia (UFBA) |
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Repositório Institucional da UFBA |
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