Synthesis of silica xerogels with high surface area using acetic acid as catalyst

Detalhes bibliográficos
Autor(a) principal: Arenas,Leliz T.
Data de Publicação: 2007
Outros Autores: Simm,Carolina W., Gushikem,Yoshitaka, Dias,Silvio L. P., Moro,Celso C., Costa,Tania M. H., Benvenutti,Edilson V.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Journal of the Brazilian Chemical Society (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532007000500003
Resumo: The influence of acetic acid on the pore structure and surface area of silica prepared by the sol-gel method was investigated. Experimental conditions of synthesis, such as gelation temperature and solvents, were also studied. N2 adsorption isotherms of the samples were type 1, typical of microporous materials, explaining the high surface area values (BET) observed. The simultaneous addition of acetic and hydrochloric acids as catalysts and of acetone as solvent, together with the use of a gelation temperature of 20 ºC, made it possible to prepare amorphous silica materials with surface area values up to 850 m² g-1. The high surface area value of these samples could be explained by the microporosity and the nanometric size of the particles.
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spelling Synthesis of silica xerogels with high surface area using acetic acid as catalystsilicamicroporous materialshigh surface areaacetic acidThe influence of acetic acid on the pore structure and surface area of silica prepared by the sol-gel method was investigated. Experimental conditions of synthesis, such as gelation temperature and solvents, were also studied. N2 adsorption isotherms of the samples were type 1, typical of microporous materials, explaining the high surface area values (BET) observed. The simultaneous addition of acetic and hydrochloric acids as catalysts and of acetone as solvent, together with the use of a gelation temperature of 20 ºC, made it possible to prepare amorphous silica materials with surface area values up to 850 m² g-1. The high surface area value of these samples could be explained by the microporosity and the nanometric size of the particles.Sociedade Brasileira de Química2007-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532007000500003Journal of the Brazilian Chemical Society v.18 n.5 2007reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532007000500003info:eu-repo/semantics/openAccessArenas,Leliz T.Simm,Carolina W.Gushikem,YoshitakaDias,Silvio L. P.Moro,Celso C.Costa,Tania M. H.Benvenutti,Edilson V.eng2007-10-25T00:00:00Zoai:scielo:S0103-50532007000500003Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2007-10-25T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Synthesis of silica xerogels with high surface area using acetic acid as catalyst
title Synthesis of silica xerogels with high surface area using acetic acid as catalyst
spellingShingle Synthesis of silica xerogels with high surface area using acetic acid as catalyst
Arenas,Leliz T.
silica
microporous materials
high surface area
acetic acid
title_short Synthesis of silica xerogels with high surface area using acetic acid as catalyst
title_full Synthesis of silica xerogels with high surface area using acetic acid as catalyst
title_fullStr Synthesis of silica xerogels with high surface area using acetic acid as catalyst
title_full_unstemmed Synthesis of silica xerogels with high surface area using acetic acid as catalyst
title_sort Synthesis of silica xerogels with high surface area using acetic acid as catalyst
author Arenas,Leliz T.
author_facet Arenas,Leliz T.
Simm,Carolina W.
Gushikem,Yoshitaka
Dias,Silvio L. P.
Moro,Celso C.
Costa,Tania M. H.
Benvenutti,Edilson V.
author_role author
author2 Simm,Carolina W.
Gushikem,Yoshitaka
Dias,Silvio L. P.
Moro,Celso C.
Costa,Tania M. H.
Benvenutti,Edilson V.
author2_role author
author
author
author
author
author
dc.contributor.author.fl_str_mv Arenas,Leliz T.
Simm,Carolina W.
Gushikem,Yoshitaka
Dias,Silvio L. P.
Moro,Celso C.
Costa,Tania M. H.
Benvenutti,Edilson V.
dc.subject.por.fl_str_mv silica
microporous materials
high surface area
acetic acid
topic silica
microporous materials
high surface area
acetic acid
description The influence of acetic acid on the pore structure and surface area of silica prepared by the sol-gel method was investigated. Experimental conditions of synthesis, such as gelation temperature and solvents, were also studied. N2 adsorption isotherms of the samples were type 1, typical of microporous materials, explaining the high surface area values (BET) observed. The simultaneous addition of acetic and hydrochloric acids as catalysts and of acetone as solvent, together with the use of a gelation temperature of 20 ºC, made it possible to prepare amorphous silica materials with surface area values up to 850 m² g-1. The high surface area value of these samples could be explained by the microporosity and the nanometric size of the particles.
publishDate 2007
dc.date.none.fl_str_mv 2007-01-01
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=S0103-50532007000500003
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532007000500003
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-50532007000500003
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 Sociedade Brasileira de Química
publisher.none.fl_str_mv Sociedade Brasileira de Química
dc.source.none.fl_str_mv Journal of the Brazilian Chemical Society v.18 n.5 2007
reponame:Journal of the Brazilian Chemical Society (Online)
instname:Sociedade Brasileira de Química (SBQ)
instacron:SBQ
instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Journal of the Brazilian Chemical Society (Online)
collection Journal of the Brazilian Chemical Society (Online)
repository.name.fl_str_mv Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv ||office@jbcs.sbq.org.br
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