Metodologias de sínteses de nanoestruturas de dissulfeto de molibdênio (MoS2) via rotas top-down e bottom-up e aplicações para remediação ambiental
Autor(a) principal: | |
---|---|
Data de Publicação: | 2022 |
Tipo de documento: | Tese |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFSCAR |
Texto Completo: | https://repositorio.ufscar.br/handle/ufscar/17200 |
Resumo: | The development of nanostructured platforms and nanocomposites has shown potential for applications aimed at pollutants mitigation. Molybdenum disulfide (MoS2) is one of these versatile nanomaterials that can act as pollutant removal agents due to its characteristics such as high surface area, functional groups, chemical stability, thermal stability and 2D structure, having been applied in adsorption systems and filtering systems of dyes of organic and inorganic molecules. However, factors linked to the cost, time required and efficiency of synthesis routes, in view of the proposed environmental applications are challenging. Therefore, in the project new experimental conditions for the bottom-up and top-down syntheses of molybdenum disulfide nanostructures have been proposed, which were combined to produce nanocomposites. By investigating the morphology of each molybdenum disulfide obtained and their characteristics, it was possible to use them in different environmental remediation systems, including dye adsorption, metal adsorption, membrane modification and metal detection. Initially, it was found that different processing routes contribute to the exfoliation process and increase the exposed area of the MoS2 sheets. The top-down synthesis, for example, has the capacity to increase the Pb(II) ion removal efficiency, reaching a capacity of 740.7 mg.g-1. It was also found that the bottom-up route is more advantageous for removing dye (macromolecule) compared to MoS2 synthesized by top-down or unprocessed route, reaching adsorption capacity of 111.2 mg.g-1 of MoS2. When the MoS2 synthesized by the bottom-up route was immobilized on commercial Polysulfone filtration membranes, the membrane efficiency rose from 79% to 99% for rejection of the Direct Red dye and from 76% to 91% for the Congo Red dye. In addition, MoS2 Quantum Dots were obtained with a quantum yielding ranging from 7-13,2% with ability to detect heavy metals ions. Among different ions, Cupper (II) could be detected in laboratory assays in the linear logarithmic range from 1-1000 μM, with detection of <0.38 μM. In general, our results show the potential of the proposed routes to obtain MoS2 of different morphologies and their nanocomposites for applications in environmental remediation. |
id |
SCAR_40e11700394f7689f8381b5a7f31231c |
---|---|
oai_identifier_str |
oai:repositorio.ufscar.br:ufscar/17200 |
network_acronym_str |
SCAR |
network_name_str |
Repositório Institucional da UFSCAR |
repository_id_str |
4322 |
spelling |
Schneider, RodrigoCorrea, Daniel Souzahttp://lattes.cnpq.br/0461451015026948http://lattes.cnpq.br/8667292843233423125748ff-7990-457d-b698-5e9dafbfec652023-01-10T17:48:05Z2023-01-10T17:48:05Z2022-11-28SCHNEIDER, Rodrigo. Metodologias de sínteses de nanoestruturas de dissulfeto de molibdênio (MoS2) via rotas top-down e bottom-up e aplicações para remediação ambiental. 2022. Tese (Doutorado em Química) – Universidade Federal de São Carlos, São Carlos, 2022. Disponível em: https://repositorio.ufscar.br/handle/ufscar/17200.https://repositorio.ufscar.br/handle/ufscar/17200The development of nanostructured platforms and nanocomposites has shown potential for applications aimed at pollutants mitigation. Molybdenum disulfide (MoS2) is one of these versatile nanomaterials that can act as pollutant removal agents due to its characteristics such as high surface area, functional groups, chemical stability, thermal stability and 2D structure, having been applied in adsorption systems and filtering systems of dyes of organic and inorganic molecules. However, factors linked to the cost, time required and efficiency of synthesis routes, in view of the proposed environmental applications are challenging. Therefore, in the project new experimental conditions for the bottom-up and top-down syntheses of molybdenum disulfide nanostructures have been proposed, which were combined to produce nanocomposites. By investigating the morphology of each molybdenum disulfide obtained and their characteristics, it was possible to use them in different environmental remediation systems, including dye adsorption, metal adsorption, membrane modification and metal detection. Initially, it was found that different processing routes contribute to the exfoliation process and increase the exposed area of the MoS2 sheets. The top-down synthesis, for example, has the capacity to increase the Pb(II) ion removal efficiency, reaching a capacity of 740.7 mg.g-1. It was also found that the bottom-up route is more advantageous for removing dye (macromolecule) compared to MoS2 synthesized by top-down or unprocessed route, reaching adsorption capacity of 111.2 mg.g-1 of MoS2. When the MoS2 synthesized by the bottom-up route was immobilized on commercial Polysulfone filtration membranes, the membrane efficiency rose from 79% to 99% for rejection of the Direct Red dye and from 76% to 91% for the Congo Red dye. In addition, MoS2 Quantum Dots were obtained with a quantum yielding ranging from 7-13,2% with ability to detect heavy metals ions. Among different ions, Cupper (II) could be detected in laboratory assays in the linear logarithmic range from 1-1000 μM, with detection of <0.38 μM. In general, our results show the potential of the proposed routes to obtain MoS2 of different morphologies and their nanocomposites for applications in environmental remediation.O desenvolvimento de plataformas nanoestruturadas e de nanocompósitos tem demonstrado potencial para aplicações visando à mitigação de poluentes. O dissulfeto de molibdênio (MoS2) é um desses nanomateriais versáteis que podem atuar como agentes de remoção de poluentes devido às suas características como elevada área superficial, grupos funcionais, estabilidade química, estabilidade térmica e estrutura 2D, tendo sido aplicado em sistemas de adsorção e sistemas filtrantes de corantes de moléculas orgânicas e inorgânicas. Porém, fatores atrelados ao custo, tempo requerido e eficiência de algumas rotas de síntese, frente aos objetivos ambientais propostos ainda são desafiadores. Por isso, foram propostas novas condições experimentais para as sínteses bottom-up e top-down de nanoestruturas de dissulfeto de molibdênio, os quais foram combinados para produção de nanocompósitos. Através da investigação da morfologia de cada dissulfeto de molibdênio obtido e suas características, foi possível utilizá-los em diferentes sistemas de remediação ambiental, incluindo na adsorção de corante, adsorção de metais, modificação de membranas e detecção de metais. Inicialmente, foi constatado que os diferentes processamentos contribuem para o processo de esfoliação e aumento da área exposta das folhas do dissulfeto. A síntese top-down, por exemplo, possui capacidade para aumentar a eficiência de remoção do íon Pb (II), atingindo uma capacidade de 740,7 mg.g-1. Verificou-se também que a rota bottom-up é mais vantajosa para remoção de corante (macromolécula) em comparação com MoS2 sintetizado por rota top-down ou não processado, atingindo capacidade de adsorção de 111,2 mg.g-1 de MoS2. Quando o MoS2 sintetizado por rota bottom-up foi imobilizado em membranas de filtração comerciais de Polisulfona, a eficiência da membrana subiu de 79% para 99% para rejeição do corante Direct Red e de 76% para 91% para o corante Congo Red. Adicionalmente, Quantum Dots de MoS2 puderam ser sintetizados com rendimentos quânticos entre 7-13,2% e demonstraram capacidade para detecção de íons metálicos. Entre os íons, o Cobre (II) pode ser detectado em ensaios laboratoriais na faixa logarítmica linear de 1-1000 μM, com limites de detecção <0,38 μM. Em geral, nossos resultados mostram a potencialidade das rotas propostas para obter MoS2 de diferentes morfologias e seus nanocompósitos para aplicações em remediação ambiental.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)141107/2018-988887.569937/2020-002018/18468-2porUniversidade Federal de São CarlosCâmpus São CarlosPrograma de Pós-Graduação em Química - PPGQUFSCarAttribution 3.0 Brazilhttp://creativecommons.org/licenses/by/3.0/br/info:eu-repo/semantics/openAccessMoS2NanofibrasFiação por soproMateriais 2DMembranas compósitasDissulfeto de molibdênioNanofibras compósitasMolybdenum disulfideSolution Blow SpinningNanofibers2D materialsComposite nanofibersComposite membranesCIENCIAS EXATAS E DA TERRA::QUIMICA::FISICO-QUIMICAMetodologias de sínteses de nanoestruturas de dissulfeto de molibdênio (MoS2) via rotas top-down e bottom-up e aplicações para remediação ambientalMolybdenum disulfide (MOS2) nanostructures synthesis methodologies via top-down and bottom-up routes and applications for environmental remediationinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesis6006003a823a08-abf5-4be7-8bd9-edb22e6aed81reponame:Repositório Institucional da UFSCARinstname:Universidade Federal de São Carlos (UFSCAR)instacron:UFSCARORIGINALTese-RodrigoSchneider.pdfTese-RodrigoSchneider.pdfTese_Doutorado-RodrigoSchneiderapplication/pdf10786808https://repositorio.ufscar.br/bitstream/ufscar/17200/1/Tese-RodrigoSchneider.pdfd388a64ad290c36fb16ddb35681cbe46MD51CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8914https://repositorio.ufscar.br/bitstream/ufscar/17200/2/license_rdf4d2950bda3d176f570a9f8b328dfbbefMD52TEXTTese-RodrigoSchneider.pdf.txtTese-RodrigoSchneider.pdf.txtExtracted texttext/plain209903https://repositorio.ufscar.br/bitstream/ufscar/17200/3/Tese-RodrigoSchneider.pdf.txt3a684f2dd3b92360e78dfd37a1ac7340MD53THUMBNAILTese-RodrigoSchneider.pdf.jpgTese-RodrigoSchneider.pdf.jpgIM Thumbnailimage/jpeg10782https://repositorio.ufscar.br/bitstream/ufscar/17200/4/Tese-RodrigoSchneider.pdf.jpg571ee7f780185005161ac5ada7602c5aMD54ufscar/172002023-10-23 13:01:55.251oai:repositorio.ufscar.br:ufscar/17200Repositório InstitucionalPUBhttps://repositorio.ufscar.br/oai/requestopendoar:43222023-10-23T13:01:55Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.por.fl_str_mv |
Metodologias de sínteses de nanoestruturas de dissulfeto de molibdênio (MoS2) via rotas top-down e bottom-up e aplicações para remediação ambiental |
dc.title.alternative.eng.fl_str_mv |
Molybdenum disulfide (MOS2) nanostructures synthesis methodologies via top-down and bottom-up routes and applications for environmental remediation |
title |
Metodologias de sínteses de nanoestruturas de dissulfeto de molibdênio (MoS2) via rotas top-down e bottom-up e aplicações para remediação ambiental |
spellingShingle |
Metodologias de sínteses de nanoestruturas de dissulfeto de molibdênio (MoS2) via rotas top-down e bottom-up e aplicações para remediação ambiental Schneider, Rodrigo MoS2 Nanofibras Fiação por sopro Materiais 2D Membranas compósitas Dissulfeto de molibdênio Nanofibras compósitas Molybdenum disulfide Solution Blow Spinning Nanofibers 2D materials Composite nanofibers Composite membranes CIENCIAS EXATAS E DA TERRA::QUIMICA::FISICO-QUIMICA |
title_short |
Metodologias de sínteses de nanoestruturas de dissulfeto de molibdênio (MoS2) via rotas top-down e bottom-up e aplicações para remediação ambiental |
title_full |
Metodologias de sínteses de nanoestruturas de dissulfeto de molibdênio (MoS2) via rotas top-down e bottom-up e aplicações para remediação ambiental |
title_fullStr |
Metodologias de sínteses de nanoestruturas de dissulfeto de molibdênio (MoS2) via rotas top-down e bottom-up e aplicações para remediação ambiental |
title_full_unstemmed |
Metodologias de sínteses de nanoestruturas de dissulfeto de molibdênio (MoS2) via rotas top-down e bottom-up e aplicações para remediação ambiental |
title_sort |
Metodologias de sínteses de nanoestruturas de dissulfeto de molibdênio (MoS2) via rotas top-down e bottom-up e aplicações para remediação ambiental |
author |
Schneider, Rodrigo |
author_facet |
Schneider, Rodrigo |
author_role |
author |
dc.contributor.authorlattes.por.fl_str_mv |
http://lattes.cnpq.br/8667292843233423 |
dc.contributor.author.fl_str_mv |
Schneider, Rodrigo |
dc.contributor.advisor1.fl_str_mv |
Correa, Daniel Souza |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/0461451015026948 |
dc.contributor.authorID.fl_str_mv |
125748ff-7990-457d-b698-5e9dafbfec65 |
contributor_str_mv |
Correa, Daniel Souza |
dc.subject.por.fl_str_mv |
MoS2 Nanofibras Fiação por sopro Materiais 2D Membranas compósitas Dissulfeto de molibdênio Nanofibras compósitas |
topic |
MoS2 Nanofibras Fiação por sopro Materiais 2D Membranas compósitas Dissulfeto de molibdênio Nanofibras compósitas Molybdenum disulfide Solution Blow Spinning Nanofibers 2D materials Composite nanofibers Composite membranes CIENCIAS EXATAS E DA TERRA::QUIMICA::FISICO-QUIMICA |
dc.subject.eng.fl_str_mv |
Molybdenum disulfide Solution Blow Spinning Nanofibers 2D materials Composite nanofibers Composite membranes |
dc.subject.cnpq.fl_str_mv |
CIENCIAS EXATAS E DA TERRA::QUIMICA::FISICO-QUIMICA |
description |
The development of nanostructured platforms and nanocomposites has shown potential for applications aimed at pollutants mitigation. Molybdenum disulfide (MoS2) is one of these versatile nanomaterials that can act as pollutant removal agents due to its characteristics such as high surface area, functional groups, chemical stability, thermal stability and 2D structure, having been applied in adsorption systems and filtering systems of dyes of organic and inorganic molecules. However, factors linked to the cost, time required and efficiency of synthesis routes, in view of the proposed environmental applications are challenging. Therefore, in the project new experimental conditions for the bottom-up and top-down syntheses of molybdenum disulfide nanostructures have been proposed, which were combined to produce nanocomposites. By investigating the morphology of each molybdenum disulfide obtained and their characteristics, it was possible to use them in different environmental remediation systems, including dye adsorption, metal adsorption, membrane modification and metal detection. Initially, it was found that different processing routes contribute to the exfoliation process and increase the exposed area of the MoS2 sheets. The top-down synthesis, for example, has the capacity to increase the Pb(II) ion removal efficiency, reaching a capacity of 740.7 mg.g-1. It was also found that the bottom-up route is more advantageous for removing dye (macromolecule) compared to MoS2 synthesized by top-down or unprocessed route, reaching adsorption capacity of 111.2 mg.g-1 of MoS2. When the MoS2 synthesized by the bottom-up route was immobilized on commercial Polysulfone filtration membranes, the membrane efficiency rose from 79% to 99% for rejection of the Direct Red dye and from 76% to 91% for the Congo Red dye. In addition, MoS2 Quantum Dots were obtained with a quantum yielding ranging from 7-13,2% with ability to detect heavy metals ions. Among different ions, Cupper (II) could be detected in laboratory assays in the linear logarithmic range from 1-1000 μM, with detection of <0.38 μM. In general, our results show the potential of the proposed routes to obtain MoS2 of different morphologies and their nanocomposites for applications in environmental remediation. |
publishDate |
2022 |
dc.date.issued.fl_str_mv |
2022-11-28 |
dc.date.accessioned.fl_str_mv |
2023-01-10T17:48:05Z |
dc.date.available.fl_str_mv |
2023-01-10T17:48:05Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/doctoralThesis |
format |
doctoralThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
SCHNEIDER, Rodrigo. Metodologias de sínteses de nanoestruturas de dissulfeto de molibdênio (MoS2) via rotas top-down e bottom-up e aplicações para remediação ambiental. 2022. Tese (Doutorado em Química) – Universidade Federal de São Carlos, São Carlos, 2022. Disponível em: https://repositorio.ufscar.br/handle/ufscar/17200. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufscar.br/handle/ufscar/17200 |
identifier_str_mv |
SCHNEIDER, Rodrigo. Metodologias de sínteses de nanoestruturas de dissulfeto de molibdênio (MoS2) via rotas top-down e bottom-up e aplicações para remediação ambiental. 2022. Tese (Doutorado em Química) – Universidade Federal de São Carlos, São Carlos, 2022. Disponível em: https://repositorio.ufscar.br/handle/ufscar/17200. |
url |
https://repositorio.ufscar.br/handle/ufscar/17200 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.confidence.fl_str_mv |
600 600 |
dc.relation.authority.fl_str_mv |
3a823a08-abf5-4be7-8bd9-edb22e6aed81 |
dc.rights.driver.fl_str_mv |
Attribution 3.0 Brazil http://creativecommons.org/licenses/by/3.0/br/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Attribution 3.0 Brazil http://creativecommons.org/licenses/by/3.0/br/ |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Universidade Federal de São Carlos Câmpus São Carlos |
dc.publisher.program.fl_str_mv |
Programa de Pós-Graduação em Química - PPGQ |
dc.publisher.initials.fl_str_mv |
UFSCar |
publisher.none.fl_str_mv |
Universidade Federal de São Carlos Câmpus São Carlos |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFSCAR instname:Universidade Federal de São Carlos (UFSCAR) instacron:UFSCAR |
instname_str |
Universidade Federal de São Carlos (UFSCAR) |
instacron_str |
UFSCAR |
institution |
UFSCAR |
reponame_str |
Repositório Institucional da UFSCAR |
collection |
Repositório Institucional da UFSCAR |
bitstream.url.fl_str_mv |
https://repositorio.ufscar.br/bitstream/ufscar/17200/1/Tese-RodrigoSchneider.pdf https://repositorio.ufscar.br/bitstream/ufscar/17200/2/license_rdf https://repositorio.ufscar.br/bitstream/ufscar/17200/3/Tese-RodrigoSchneider.pdf.txt https://repositorio.ufscar.br/bitstream/ufscar/17200/4/Tese-RodrigoSchneider.pdf.jpg |
bitstream.checksum.fl_str_mv |
d388a64ad290c36fb16ddb35681cbe46 4d2950bda3d176f570a9f8b328dfbbef 3a684f2dd3b92360e78dfd37a1ac7340 571ee7f780185005161ac5ada7602c5a |
bitstream.checksumAlgorithm.fl_str_mv |
MD5 MD5 MD5 MD5 |
repository.name.fl_str_mv |
Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR) |
repository.mail.fl_str_mv |
|
_version_ |
1813715657769877504 |