Obtaining high purity silica from rice hulls
Autor(a) principal: | |
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Data de Publicação: | 2010 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Química Nova (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422010000400005 |
Resumo: | Many routes for extracting silica from rice hulls are based on direct calcining. These methods, though, often produce silica contaminated with inorganic impurities. This work presents the study of a strategy for obtaining silica from rice hulls with a purity level adequate for applications in electronics. The technique is based on two leaching steps, using respectively aqua regia and Piranha solutions, which extract the organic matrix and inorganic impurities. The material was characterized by Fourier-transform infrared spectroscopy (FTIR), powder x-ray diffraction (XRD), x-ray fluorescence (XRF), scanning electron microscopy (SEM), particle size analysis by laser diffraction (LPSA) and thermal analysis. |
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Obtaining high purity silica from rice hullsrice hullssilicaleachingMany routes for extracting silica from rice hulls are based on direct calcining. These methods, though, often produce silica contaminated with inorganic impurities. This work presents the study of a strategy for obtaining silica from rice hulls with a purity level adequate for applications in electronics. The technique is based on two leaching steps, using respectively aqua regia and Piranha solutions, which extract the organic matrix and inorganic impurities. The material was characterized by Fourier-transform infrared spectroscopy (FTIR), powder x-ray diffraction (XRD), x-ray fluorescence (XRF), scanning electron microscopy (SEM), particle size analysis by laser diffraction (LPSA) and thermal analysis.Sociedade Brasileira de Química2010-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422010000400005Química Nova v.33 n.4 2010reponame:Química Nova (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0100-40422010000400005info:eu-repo/semantics/openAccessSilva Júnior,José daCunha,Carlo R. daCarvalho,Flávio L. S. deRodrigues Filho,Ubirajara P.Oliveira,Paulo R.Silva,Marcos A. Segattoeng2010-06-02T00:00:00Zoai:scielo:S0100-40422010000400005Revistahttps://www.scielo.br/j/qn/ONGhttps://old.scielo.br/oai/scielo-oai.phpquimicanova@sbq.org.br1678-70640100-4042opendoar:2010-06-02T00:00Química Nova (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
Obtaining high purity silica from rice hulls |
title |
Obtaining high purity silica from rice hulls |
spellingShingle |
Obtaining high purity silica from rice hulls Silva Júnior,José da rice hulls silica leaching |
title_short |
Obtaining high purity silica from rice hulls |
title_full |
Obtaining high purity silica from rice hulls |
title_fullStr |
Obtaining high purity silica from rice hulls |
title_full_unstemmed |
Obtaining high purity silica from rice hulls |
title_sort |
Obtaining high purity silica from rice hulls |
author |
Silva Júnior,José da |
author_facet |
Silva Júnior,José da Cunha,Carlo R. da Carvalho,Flávio L. S. de Rodrigues Filho,Ubirajara P. Oliveira,Paulo R. Silva,Marcos A. Segatto |
author_role |
author |
author2 |
Cunha,Carlo R. da Carvalho,Flávio L. S. de Rodrigues Filho,Ubirajara P. Oliveira,Paulo R. Silva,Marcos A. Segatto |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Silva Júnior,José da Cunha,Carlo R. da Carvalho,Flávio L. S. de Rodrigues Filho,Ubirajara P. Oliveira,Paulo R. Silva,Marcos A. Segatto |
dc.subject.por.fl_str_mv |
rice hulls silica leaching |
topic |
rice hulls silica leaching |
description |
Many routes for extracting silica from rice hulls are based on direct calcining. These methods, though, often produce silica contaminated with inorganic impurities. This work presents the study of a strategy for obtaining silica from rice hulls with a purity level adequate for applications in electronics. The technique is based on two leaching steps, using respectively aqua regia and Piranha solutions, which extract the organic matrix and inorganic impurities. The material was characterized by Fourier-transform infrared spectroscopy (FTIR), powder x-ray diffraction (XRD), x-ray fluorescence (XRF), scanning electron microscopy (SEM), particle size analysis by laser diffraction (LPSA) and thermal analysis. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010-01-01 |
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=S0100-40422010000400005 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422010000400005 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0100-40422010000400005 |
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 |
Química Nova v.33 n.4 2010 reponame:Química Nova (Online) instname:Sociedade Brasileira de Química (SBQ) instacron:SBQ |
instname_str |
Sociedade Brasileira de Química (SBQ) |
instacron_str |
SBQ |
institution |
SBQ |
reponame_str |
Química Nova (Online) |
collection |
Química Nova (Online) |
repository.name.fl_str_mv |
Química Nova (Online) - Sociedade Brasileira de Química (SBQ) |
repository.mail.fl_str_mv |
quimicanova@sbq.org.br |
_version_ |
1750318110657740800 |