Microwave Synthesis of Silver Sulfide and Silver Nanoparticles: Light and Time Influence

Detalhes bibliográficos
Autor(a) principal: Magalhães Sousa, David
Data de Publicação: 2020
Outros Autores: Chiappim, William, P. Leitão, Joaquim, Lima, João Carlos, Ferreira, Isabel
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10362/116902
Resumo: UIDB/50025/2020 UIDP/50025/2020 UID/CTM/50025/2019 .
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spelling Microwave Synthesis of Silver Sulfide and Silver Nanoparticles: Light and Time InfluenceChemistry(all)Chemical Engineering(all)UIDB/50025/2020 UIDP/50025/2020 UID/CTM/50025/2019 .Silver sulfide (Ag2S) is a low band gap material, which absorbs near-infrared light and is of great importance in areas such as nanotechnology and biomedicine. We report the influence of the starting reagents, synthesis time, and light radiation on the geometry and size of silver sulfide nanoparticles and on the fraction of metallic Ag obtained in a microwave reactor. The X-ray diffraction diffractograms confirmed that Ag2S is the main product if the reaction's precursor contains silver in the oxidation state of +1 and mostly metallic silver (Ag°) when it is +2. Small nanoparticles (∼6 nm) of spherical geometry are present in the transmission electron microscopy images for the synthesis performed with the lamp light ON, while with the light switched OFF, wider and hundreds of nanometers longer particles are observed. This discriminative effect occurs with shorter synthesis time duration (<10 min) but when the time of reaction is extended, the particles coalesce for both light and dark conditions. Overall, it was observed by photoluminescence that crystalline Ag and Ag2S 4-8 nm nanoparticles obtained in 15 min and light irradiation during synthesis have a clear relative increase of the radiative recombination channels of the charged carriers, which are typical of materials characterized by the involvement of low density of states inside the band gap.LAQV@REQUIMTEDQ - Departamento de QuímicaRUNMagalhães Sousa, DavidChiappim, WilliamP. Leitão, JoaquimLima, João CarlosFerreira, Isabel2021-05-03T22:55:21Z2020-06-092020-06-09T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article5application/pdfhttp://hdl.handle.net/10362/116902eng2470-1343PURE: 28853448https://doi.org/10.1021/acsomega.0c00656info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-03-11T04:59:47Zoai:run.unl.pt:10362/116902Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:43:21.791769Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Microwave Synthesis of Silver Sulfide and Silver Nanoparticles: Light and Time Influence
title Microwave Synthesis of Silver Sulfide and Silver Nanoparticles: Light and Time Influence
spellingShingle Microwave Synthesis of Silver Sulfide and Silver Nanoparticles: Light and Time Influence
Magalhães Sousa, David
Chemistry(all)
Chemical Engineering(all)
title_short Microwave Synthesis of Silver Sulfide and Silver Nanoparticles: Light and Time Influence
title_full Microwave Synthesis of Silver Sulfide and Silver Nanoparticles: Light and Time Influence
title_fullStr Microwave Synthesis of Silver Sulfide and Silver Nanoparticles: Light and Time Influence
title_full_unstemmed Microwave Synthesis of Silver Sulfide and Silver Nanoparticles: Light and Time Influence
title_sort Microwave Synthesis of Silver Sulfide and Silver Nanoparticles: Light and Time Influence
author Magalhães Sousa, David
author_facet Magalhães Sousa, David
Chiappim, William
P. Leitão, Joaquim
Lima, João Carlos
Ferreira, Isabel
author_role author
author2 Chiappim, William
P. Leitão, Joaquim
Lima, João Carlos
Ferreira, Isabel
author2_role author
author
author
author
dc.contributor.none.fl_str_mv LAQV@REQUIMTE
DQ - Departamento de Química
RUN
dc.contributor.author.fl_str_mv Magalhães Sousa, David
Chiappim, William
P. Leitão, Joaquim
Lima, João Carlos
Ferreira, Isabel
dc.subject.por.fl_str_mv Chemistry(all)
Chemical Engineering(all)
topic Chemistry(all)
Chemical Engineering(all)
description UIDB/50025/2020 UIDP/50025/2020 UID/CTM/50025/2019 .
publishDate 2020
dc.date.none.fl_str_mv 2020-06-09
2020-06-09T00:00:00Z
2021-05-03T22:55:21Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10362/116902
url http://hdl.handle.net/10362/116902
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 2470-1343
PURE: 28853448
https://doi.org/10.1021/acsomega.0c00656
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 5
application/pdf
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
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collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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