Avaliação do efeito das rotas sintéticas de materiais mesoporosos nas propriedades estruturais e morfológicas

Detalhes bibliográficos
Autor(a) principal: Silva, Silvia Caroline Gomes dos Santos
Data de Publicação: 2011
Tipo de documento: Dissertação
Idioma: por
Título da fonte: Repositório Institucional da UFS
Texto Completo: https://ri.ufs.br/handle/riufs/6140
Resumo: The mesoporous materials like MCM-41apresentam hexagonal arrangement of mesopores with pore diameter from 2 to 10 nm and high surface area. Due to these characteristics, these materials are considered promising as support for heterogeneous catalysts, devices for controlled drug release and absorption. In this work, were synthesized mesoporous materials like MCM-41 via two synthesis routes in order to correlate the synthetic route to the surface area, assess their influence on the structural and morphological properties, and their respective application as dye adsorbent textiles. For both synthesis routes were used as precursors of silica gel, sodium silicate, water and cetyltrimethylammonium chloride (CTMABr), as an agent-driver structure. In the first synthesis route the materials were obtained by hydrothermal method with different temperatures (ambient 70 ° C and 100 ° C) and aging times (2h, 2 4h, 48h and 72h), with pH adjustment and every 24 hours calcinations at 550 ° C/4h. In the second synthesis route, we adopted the aging temperature environment and different times of crystallization (, 24h, 48h and 72h), no pH adjustment of the reaction medium and calcinations was performed at 550 ° C/6h. The MCM-41 was analyzed by X-ray diffraction (XRD), thermogravimetric analysis (TG, DTA and DTG), and absorption spectroscopy in the infrared (IR) and nitrogen adsorption (BET method - Brunauer-Emmett-Teller). Through the analysis of XRD, TG, IR and nitrogen adsorption showed that the calcination conditions were promising agent for the removal of driver structure and the optimization of routes allowed for the synthesis of MCM-41 with a shorter time and temperature aging, expected in the literature. However, it was not possible to establish a relationship between time, temperature and aging structural ordering of MCM-41. In addition, the test results of the use of MCM-41 as an adsorbent textile dye showed a higher adsorption of the dye Orange-16, for not calcined sample as compared to calcined sample at room temperature, confirming the promising application in the treatment of waste textiles.
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spelling Silva, Silvia Caroline Gomes dos Santoshttp://lattes.cnpq.br/5522973267242686Mesquita, Maria Elianehttp://lattes.cnpq.br/45809304029383442017-09-27T13:58:01Z2017-09-27T13:58:01Z2011-04-08https://ri.ufs.br/handle/riufs/6140The mesoporous materials like MCM-41apresentam hexagonal arrangement of mesopores with pore diameter from 2 to 10 nm and high surface area. Due to these characteristics, these materials are considered promising as support for heterogeneous catalysts, devices for controlled drug release and absorption. In this work, were synthesized mesoporous materials like MCM-41 via two synthesis routes in order to correlate the synthetic route to the surface area, assess their influence on the structural and morphological properties, and their respective application as dye adsorbent textiles. For both synthesis routes were used as precursors of silica gel, sodium silicate, water and cetyltrimethylammonium chloride (CTMABr), as an agent-driver structure. In the first synthesis route the materials were obtained by hydrothermal method with different temperatures (ambient 70 ° C and 100 ° C) and aging times (2h, 2 4h, 48h and 72h), with pH adjustment and every 24 hours calcinations at 550 ° C/4h. In the second synthesis route, we adopted the aging temperature environment and different times of crystallization (, 24h, 48h and 72h), no pH adjustment of the reaction medium and calcinations was performed at 550 ° C/6h. The MCM-41 was analyzed by X-ray diffraction (XRD), thermogravimetric analysis (TG, DTA and DTG), and absorption spectroscopy in the infrared (IR) and nitrogen adsorption (BET method - Brunauer-Emmett-Teller). Through the analysis of XRD, TG, IR and nitrogen adsorption showed that the calcination conditions were promising agent for the removal of driver structure and the optimization of routes allowed for the synthesis of MCM-41 with a shorter time and temperature aging, expected in the literature. However, it was not possible to establish a relationship between time, temperature and aging structural ordering of MCM-41. In addition, the test results of the use of MCM-41 as an adsorbent textile dye showed a higher adsorption of the dye Orange-16, for not calcined sample as compared to calcined sample at room temperature, confirming the promising application in the treatment of waste textiles.Os materiais Mesoporosos do tipo MCM-41apresentam arranjo hexagonal de Mesoporoso com diâmetro de poro entre 2 a 10 nm e elevada área superficial. Devido a essas características, estes materiais são considerados promissores como suporte para catalisadores heterogêneos, dispositivos pra liberação controlada de fármacos e adsorção. Neste trabalho, foram sintetizados os materiais Mesoporosos do tipo MCM-41 através de duas rotas de síntese com o objetivo de correlacionar à rota sintética com a área superficial, avaliar sua influência sobre as propriedades estruturais e morfológicas, e sua respectiva aplicação como adsorvente de corante têxtil. Para as duas rotas de síntese utilizaram- se como precursores a sílica gel, silicato de sódio, água e o cloreto de cetiltrimetilamônio (CTMABr), como agente direcionador de estrutura. Na primeira rota de síntese os materiais foram obtidos através do método hidrotérmico, com diferentes temperaturas (ambiente, 70°C e 100°C) e tempos de envelhecimento (2h, 24h, 48h e 72h), com ajuste de pH a cada 24h e calcinação a 550°C/4h. Na segunda rota de síntese, adotou-se a temperatura de envelhecimento ambiente e diferentes tempos de cristalização (, 24h, 48h e 72h), não houve ajuste do pH do meio reacional e a calcinação foi realizada a 550°C/6h. Os MCM-41 obtidos foram analisados por difração de raios-X (DRX), análise termogravimétrica (TG, DTA e DTG), espectroscopia de absorção na região do infravermelho (IV) e adsorção de nitrogênio (método BET Brunauer- Emmett-Teller). Através das analises de DRX, TG, IV e adsorção de nitrogênio verificou-se que as condições de calcinação foram promissoras para a remoção do agente direcionador de estrutura e que a otimização das rotas possibilitou a síntese de MCM- 41 com um menor tempo e temperatura de envelhecimento, que o previsto na literatura. Entretanto, não foi possível estabelecer uma relação entre o tempo, temperatura de envelhecimento e ordenação estruturald do MCM-41. Além disso, os resultados dos ensaios da utilização do MCM-41 como adsorvente de corante têxtil mostraram uma elevada adsorção do corante Orange-16, para amostra não calcinada quando comparada a amostra calcinada, a temperatura ambiente, confirmando a promissora aplicação no tratamento de resíduos têxteis.Conselho Nacional de Desenvolvimento Científico e Tecnológicoapplication/pdfporUniversidade Federal de SergipePós-Graduação em QuímicaUFSBRMateriais mesoporososAdsorçãoRotas sintéticasMesoporous materialsAdsorptionSynthetic routesCNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICAAvaliação do efeito das rotas sintéticas de materiais mesoporosos nas propriedades estruturais e morfológicasEVALUATION OF THE EFFECT OF SYNTHETIC MATERIALS ROUTES MESOPOROUS ON PROPERTIES AND STRUCTURAL MORPHOLOGICAL.info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFSinstname:Universidade Federal de Sergipe (UFS)instacron:UFSORIGINALSILVIA_CAROLINE_GOMES_SANTOS_SILVA.pdfapplication/pdf1077624https://ri.ufs.br/jspui/bitstream/riufs/6140/1/SILVIA_CAROLINE_GOMES_SANTOS_SILVA.pdf1c4518f88f273c04cf174626476261c4MD51TEXTSILVIA_CAROLINE_GOMES_SANTOS_SILVA.pdf.txtSILVIA_CAROLINE_GOMES_SANTOS_SILVA.pdf.txtExtracted texttext/plain106678https://ri.ufs.br/jspui/bitstream/riufs/6140/2/SILVIA_CAROLINE_GOMES_SANTOS_SILVA.pdf.txt688594b2436a3ba8b7fdea8d96be0c5bMD52THUMBNAILSILVIA_CAROLINE_GOMES_SANTOS_SILVA.pdf.jpgSILVIA_CAROLINE_GOMES_SANTOS_SILVA.pdf.jpgGenerated Thumbnailimage/jpeg1439https://ri.ufs.br/jspui/bitstream/riufs/6140/3/SILVIA_CAROLINE_GOMES_SANTOS_SILVA.pdf.jpg65124b3f265c0eb8f81a0796ba1a9f00MD53riufs/61402018-01-16 19:32:00.224oai:ufs.br:riufs/6140Repositório InstitucionalPUBhttps://ri.ufs.br/oai/requestrepositorio@academico.ufs.bropendoar:2018-01-16T22:32Repositório Institucional da UFS - Universidade Federal de Sergipe (UFS)false
dc.title.por.fl_str_mv Avaliação do efeito das rotas sintéticas de materiais mesoporosos nas propriedades estruturais e morfológicas
dc.title.alternative.eng.fl_str_mv EVALUATION OF THE EFFECT OF SYNTHETIC MATERIALS ROUTES MESOPOROUS ON PROPERTIES AND STRUCTURAL MORPHOLOGICAL.
title Avaliação do efeito das rotas sintéticas de materiais mesoporosos nas propriedades estruturais e morfológicas
spellingShingle Avaliação do efeito das rotas sintéticas de materiais mesoporosos nas propriedades estruturais e morfológicas
Silva, Silvia Caroline Gomes dos Santos
Materiais mesoporosos
Adsorção
Rotas sintéticas
Mesoporous materials
Adsorption
Synthetic routes
CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA
title_short Avaliação do efeito das rotas sintéticas de materiais mesoporosos nas propriedades estruturais e morfológicas
title_full Avaliação do efeito das rotas sintéticas de materiais mesoporosos nas propriedades estruturais e morfológicas
title_fullStr Avaliação do efeito das rotas sintéticas de materiais mesoporosos nas propriedades estruturais e morfológicas
title_full_unstemmed Avaliação do efeito das rotas sintéticas de materiais mesoporosos nas propriedades estruturais e morfológicas
title_sort Avaliação do efeito das rotas sintéticas de materiais mesoporosos nas propriedades estruturais e morfológicas
author Silva, Silvia Caroline Gomes dos Santos
author_facet Silva, Silvia Caroline Gomes dos Santos
author_role author
dc.contributor.author.fl_str_mv Silva, Silvia Caroline Gomes dos Santos
dc.contributor.advisor1Lattes.fl_str_mv http://lattes.cnpq.br/5522973267242686
dc.contributor.advisor1.fl_str_mv Mesquita, Maria Eliane
dc.contributor.authorLattes.fl_str_mv http://lattes.cnpq.br/4580930402938344
contributor_str_mv Mesquita, Maria Eliane
dc.subject.por.fl_str_mv Materiais mesoporosos
Adsorção
Rotas sintéticas
topic Materiais mesoporosos
Adsorção
Rotas sintéticas
Mesoporous materials
Adsorption
Synthetic routes
CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA
dc.subject.eng.fl_str_mv Mesoporous materials
Adsorption
Synthetic routes
dc.subject.cnpq.fl_str_mv CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA
description The mesoporous materials like MCM-41apresentam hexagonal arrangement of mesopores with pore diameter from 2 to 10 nm and high surface area. Due to these characteristics, these materials are considered promising as support for heterogeneous catalysts, devices for controlled drug release and absorption. In this work, were synthesized mesoporous materials like MCM-41 via two synthesis routes in order to correlate the synthetic route to the surface area, assess their influence on the structural and morphological properties, and their respective application as dye adsorbent textiles. For both synthesis routes were used as precursors of silica gel, sodium silicate, water and cetyltrimethylammonium chloride (CTMABr), as an agent-driver structure. In the first synthesis route the materials were obtained by hydrothermal method with different temperatures (ambient 70 ° C and 100 ° C) and aging times (2h, 2 4h, 48h and 72h), with pH adjustment and every 24 hours calcinations at 550 ° C/4h. In the second synthesis route, we adopted the aging temperature environment and different times of crystallization (, 24h, 48h and 72h), no pH adjustment of the reaction medium and calcinations was performed at 550 ° C/6h. The MCM-41 was analyzed by X-ray diffraction (XRD), thermogravimetric analysis (TG, DTA and DTG), and absorption spectroscopy in the infrared (IR) and nitrogen adsorption (BET method - Brunauer-Emmett-Teller). Through the analysis of XRD, TG, IR and nitrogen adsorption showed that the calcination conditions were promising agent for the removal of driver structure and the optimization of routes allowed for the synthesis of MCM-41 with a shorter time and temperature aging, expected in the literature. However, it was not possible to establish a relationship between time, temperature and aging structural ordering of MCM-41. In addition, the test results of the use of MCM-41 as an adsorbent textile dye showed a higher adsorption of the dye Orange-16, for not calcined sample as compared to calcined sample at room temperature, confirming the promising application in the treatment of waste textiles.
publishDate 2011
dc.date.issued.fl_str_mv 2011-04-08
dc.date.accessioned.fl_str_mv 2017-09-27T13:58:01Z
dc.date.available.fl_str_mv 2017-09-27T13:58:01Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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