Incorporating Aluminum Into the Structure of SBA-15 by Adjusting the pH and Adding NaF
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Materials research (São Carlos. Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392019000300218 |
Resumo: | The Al incorporation on SBA-15 type material and the effects of pH adjusting and presence of NaF were studied. The direct synthesis method was performed for comparison. The following parameters were evaluated: the Si/Al ratio, pH increase, and amount of NaF added. These parameters have a great influence on the synthesis of the mesoporous Al/SBA-15 type, but the pH the most influential parameter for the incorporation of Al into the SBA-15 structure. The formation of the SBA-15 structure was observed through the direct synthesis method. However, aluminum is not present in the material. The increase in pH contributed to the formation of a disorganized material. By EDX, it was observed that synthesis with a Si/Al = 5 ratio and pH approximately 4 provides materials containing aluminum. When the amount of aluminum during the synthesis is lower, a pH of approximately 8 is required to incorporate aluminum into the final material. The Al-NMR analysis showed that it was possible to insert aluminum in the structure of SBA-15, but with the presence of aluminum hexa and pentacoordinated. In the catalytic test of the dehydration reaction of ethanol, the samples with higher aluminum contents showed better catalytic performance due to its higher acidity. |
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Materials research (São Carlos. Online) |
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Incorporating Aluminum Into the Structure of SBA-15 by Adjusting the pH and Adding NaFAl/SBA-15direct synthesispH adjustmentThe Al incorporation on SBA-15 type material and the effects of pH adjusting and presence of NaF were studied. The direct synthesis method was performed for comparison. The following parameters were evaluated: the Si/Al ratio, pH increase, and amount of NaF added. These parameters have a great influence on the synthesis of the mesoporous Al/SBA-15 type, but the pH the most influential parameter for the incorporation of Al into the SBA-15 structure. The formation of the SBA-15 structure was observed through the direct synthesis method. However, aluminum is not present in the material. The increase in pH contributed to the formation of a disorganized material. By EDX, it was observed that synthesis with a Si/Al = 5 ratio and pH approximately 4 provides materials containing aluminum. When the amount of aluminum during the synthesis is lower, a pH of approximately 8 is required to incorporate aluminum into the final material. The Al-NMR analysis showed that it was possible to insert aluminum in the structure of SBA-15, but with the presence of aluminum hexa and pentacoordinated. In the catalytic test of the dehydration reaction of ethanol, the samples with higher aluminum contents showed better catalytic performance due to its higher acidity.ABM, ABC, ABPol2019-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392019000300218Materials Research v.22 n.3 2019reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/1980-5373-mr-2018-0657info:eu-repo/semantics/openAccessOliveira,Manuela Silva Martins deBieseki,LindianeAlencar,Ana Ellen Valentim deBraga,Tiago PinheiroPergher,Sibele Berenice Castellãeng2019-04-16T00:00:00Zoai:scielo:S1516-14392019000300218Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2019-04-16T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.none.fl_str_mv |
Incorporating Aluminum Into the Structure of SBA-15 by Adjusting the pH and Adding NaF |
title |
Incorporating Aluminum Into the Structure of SBA-15 by Adjusting the pH and Adding NaF |
spellingShingle |
Incorporating Aluminum Into the Structure of SBA-15 by Adjusting the pH and Adding NaF Oliveira,Manuela Silva Martins de Al/SBA-15 direct synthesis pH adjustment |
title_short |
Incorporating Aluminum Into the Structure of SBA-15 by Adjusting the pH and Adding NaF |
title_full |
Incorporating Aluminum Into the Structure of SBA-15 by Adjusting the pH and Adding NaF |
title_fullStr |
Incorporating Aluminum Into the Structure of SBA-15 by Adjusting the pH and Adding NaF |
title_full_unstemmed |
Incorporating Aluminum Into the Structure of SBA-15 by Adjusting the pH and Adding NaF |
title_sort |
Incorporating Aluminum Into the Structure of SBA-15 by Adjusting the pH and Adding NaF |
author |
Oliveira,Manuela Silva Martins de |
author_facet |
Oliveira,Manuela Silva Martins de Bieseki,Lindiane Alencar,Ana Ellen Valentim de Braga,Tiago Pinheiro Pergher,Sibele Berenice Castellã |
author_role |
author |
author2 |
Bieseki,Lindiane Alencar,Ana Ellen Valentim de Braga,Tiago Pinheiro Pergher,Sibele Berenice Castellã |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Oliveira,Manuela Silva Martins de Bieseki,Lindiane Alencar,Ana Ellen Valentim de Braga,Tiago Pinheiro Pergher,Sibele Berenice Castellã |
dc.subject.por.fl_str_mv |
Al/SBA-15 direct synthesis pH adjustment |
topic |
Al/SBA-15 direct synthesis pH adjustment |
description |
The Al incorporation on SBA-15 type material and the effects of pH adjusting and presence of NaF were studied. The direct synthesis method was performed for comparison. The following parameters were evaluated: the Si/Al ratio, pH increase, and amount of NaF added. These parameters have a great influence on the synthesis of the mesoporous Al/SBA-15 type, but the pH the most influential parameter for the incorporation of Al into the SBA-15 structure. The formation of the SBA-15 structure was observed through the direct synthesis method. However, aluminum is not present in the material. The increase in pH contributed to the formation of a disorganized material. By EDX, it was observed that synthesis with a Si/Al = 5 ratio and pH approximately 4 provides materials containing aluminum. When the amount of aluminum during the synthesis is lower, a pH of approximately 8 is required to incorporate aluminum into the final material. The Al-NMR analysis showed that it was possible to insert aluminum in the structure of SBA-15, but with the presence of aluminum hexa and pentacoordinated. In the catalytic test of the dehydration reaction of ethanol, the samples with higher aluminum contents showed better catalytic performance due to its higher acidity. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392019000300218 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392019000300218 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/1980-5373-mr-2018-0657 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
ABM, ABC, ABPol |
publisher.none.fl_str_mv |
ABM, ABC, ABPol |
dc.source.none.fl_str_mv |
Materials Research v.22 n.3 2019 reponame:Materials research (São Carlos. Online) instname:Universidade Federal de São Carlos (UFSCAR) instacron:ABM ABC ABPOL |
instname_str |
Universidade Federal de São Carlos (UFSCAR) |
instacron_str |
ABM ABC ABPOL |
institution |
ABM ABC ABPOL |
reponame_str |
Materials research (São Carlos. Online) |
collection |
Materials research (São Carlos. Online) |
repository.name.fl_str_mv |
Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR) |
repository.mail.fl_str_mv |
dedz@power.ufscar.br |
_version_ |
1754212674755887104 |