SBA-15 and its carbon replica CMK-3 for rhodamine B adsorption

Porous solid materials have been widely used in various fields to optimize physicochemical processes at an industrial level. Adsorption process has been widely studied due to its low application cost and high performance when applying porous materials. The application of molecular sieves in adsorpti...

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Wedi'i Gadw mewn:
Manylion Llyfryddiaeth
Prif Awdur: Moura, Luan do Nascimento de
Awduron Eraill: Pergher, Sibele Berenice Castella
Fformat: Dissertação
Iaith:pt_BR
Cyhoeddwyd: Universidade Federal do Rio Grande do Norte
Pynciau:
Mesoporous Materials
Adsorption
Dyes
SBA-15
CMK-3
Rhodamine B
Mynediad Ar-lein:https://repositorio.ufrn.br/handle/123456789/45763
Tagiau: Ychwanegu Tag
Dim Tagiau, Byddwch y cyntaf i dagio'r cofnod hwn!
id ri-123456789-45763
record_format dspace
spelling ri-123456789-457632022-05-02T15:10:45Z SBA-15 and its carbon replica CMK-3 for rhodamine B adsorption Moura, Luan do Nascimento de Pergher, Sibele Berenice Castella http://lattes.cnpq.br/0983403516684704 http://lattes.cnpq.br/5249001430287414 Rigoti, Eduardo http://lattes.cnpq.br/5724970437643164 Oliveira, Fernando José Volpi Eusébio de http://lattes.cnpq.br/5600786330033497 Nascimento, Rubens Maribondo do http://lattes.cnpq.br/8671649752936793 Mesoporous Materials Adsorption Dyes SBA-15 CMK-3 Rhodamine B Porous solid materials have been widely used in various fields to optimize physicochemical processes at an industrial level. Adsorption process has been widely studied due to its low application cost and high performance when applying porous materials. The application of molecular sieves in adsorption enables the study of the dynamics and optimization of such physical-chemical process. Mesoporous materials have great accessibility to bulky molecules such as organic compounds and dyes due to large pore opening. However, the chemical composition, specific area, and morphology of porous systems play a fundamental role in the adsorption of these compounds. Rhodamine B is an organic dye widely used in industry and was used in this study as a model molecule. Ordered mesoporous silica (SBA-15) and carbon-based (CMK-3) materials were used for the adsorption of Rhodamine B. The materials were synthesized and characterized by X-ray diffractometry (XRD), textural analysis by N2 adsorption, and infrared spectroscopy. The results show materials with a high specific area (> 600 m2 /g) and hexagonal arrangement of the pore system. Adsorption measurements show the high efficiency of CMK-3 in removing Rhodamine B (>99%), while SBA-15 only removes ~5%. The results indicate that the composition plays an important role in the adsorption process. Carbon materials are more interactive with the dye molecule than silica materials, confirmed by the thermogravimetry and pyrolysis analyzes. The by-products resulted by the CMK-3 samples thermal degradation after adsorption resulted in many complex compounds. The morphology and size of the channels have a strong relationship with the accessibility and adsorption of Rhodamine B. The arrangement of the straight pores of the SBA15 (6.5 nm average diameter) makes it difficult for the dye molecules dissolved in the solution to access, blocking the entry of pores by the first adsorbed molecules preventing the continuation of the adsorption process. Such behavior does not occur with CMK-3, since the mesopores of the material are open and guarantee good accessibility. 2022-02-02T16:23:06Z 2022-02-02T16:23:06Z 2021-11-29 masterThesis MOURA, Luan do Nascimento de. SBA-15 and its carbon replica CMK-3 for rhodamine B adsorption. 2021. 58f. Dissertação (Mestrado em Ciência e Engenharia de Materiais) - Centro de Ciências Exatas e da Terra, Universidade Federal do Rio Grande do Norte, Natal, 2021. https://repositorio.ufrn.br/handle/123456789/45763 pt_BR Acesso Aberto application/pdf Universidade Federal do Rio Grande do Norte Brasil UFRN PROGRAMA DE PÓS-GRADUAÇÃO EM CIÊNCIA E ENGENHARIA DE MATERIAIS
institution Repositório Institucional
collection RI - UFRN
language pt_BR
topic Mesoporous Materials
Adsorption
Dyes
SBA-15
CMK-3
Rhodamine B
spellingShingle Mesoporous Materials
Adsorption
Dyes
SBA-15
CMK-3
Rhodamine B
Moura, Luan do Nascimento de
SBA-15 and its carbon replica CMK-3 for rhodamine B adsorption
description Porous solid materials have been widely used in various fields to optimize physicochemical processes at an industrial level. Adsorption process has been widely studied due to its low application cost and high performance when applying porous materials. The application of molecular sieves in adsorption enables the study of the dynamics and optimization of such physical-chemical process. Mesoporous materials have great accessibility to bulky molecules such as organic compounds and dyes due to large pore opening. However, the chemical composition, specific area, and morphology of porous systems play a fundamental role in the adsorption of these compounds. Rhodamine B is an organic dye widely used in industry and was used in this study as a model molecule. Ordered mesoporous silica (SBA-15) and carbon-based (CMK-3) materials were used for the adsorption of Rhodamine B. The materials were synthesized and characterized by X-ray diffractometry (XRD), textural analysis by N2 adsorption, and infrared spectroscopy. The results show materials with a high specific area (> 600 m2 /g) and hexagonal arrangement of the pore system. Adsorption measurements show the high efficiency of CMK-3 in removing Rhodamine B (>99%), while SBA-15 only removes ~5%. The results indicate that the composition plays an important role in the adsorption process. Carbon materials are more interactive with the dye molecule than silica materials, confirmed by the thermogravimetry and pyrolysis analyzes. The by-products resulted by the CMK-3 samples thermal degradation after adsorption resulted in many complex compounds. The morphology and size of the channels have a strong relationship with the accessibility and adsorption of Rhodamine B. The arrangement of the straight pores of the SBA15 (6.5 nm average diameter) makes it difficult for the dye molecules dissolved in the solution to access, blocking the entry of pores by the first adsorbed molecules preventing the continuation of the adsorption process. Such behavior does not occur with CMK-3, since the mesopores of the material are open and guarantee good accessibility.
author2 Pergher, Sibele Berenice Castella
author_facet Pergher, Sibele Berenice Castella
Moura, Luan do Nascimento de
format masterThesis
author Moura, Luan do Nascimento de
author_sort Moura, Luan do Nascimento de
title SBA-15 and its carbon replica CMK-3 for rhodamine B adsorption
title_short SBA-15 and its carbon replica CMK-3 for rhodamine B adsorption
title_full SBA-15 and its carbon replica CMK-3 for rhodamine B adsorption
title_fullStr SBA-15 and its carbon replica CMK-3 for rhodamine B adsorption
title_full_unstemmed SBA-15 and its carbon replica CMK-3 for rhodamine B adsorption
title_sort sba-15 and its carbon replica cmk-3 for rhodamine b adsorption
publisher Universidade Federal do Rio Grande do Norte
publishDate 2022
url https://repositorio.ufrn.br/handle/123456789/45763
work_keys_str_mv AT mouraluandonascimentode sba15anditscarbonreplicacmk3forrhodaminebadsorption
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