Microwave Synthesis of Silver Sulfide and Silver Nanoparticles: Light and Time Influence
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , |
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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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 |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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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1799138043330822144 |