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Carbon dots from coffee grounds: synthesis, characterization, and detection of noxious nitroanilines

2022-03-15Journal article Open access
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dc.contributor.authorCosta, Alexandra I.
dc.contributor.authorBarata, Patrícia
dc.contributor.authorMoraes, Bianca
dc.contributor.authorPrata, José V.
dc.date.accessioned2022-06-01T13:54:01Z
dc.date.available2022-06-01T13:54:01Z
dc.date.issued2022-03-15
dc.descriptionEste trabalho foi financiado pelo Concurso Anual para Projetos de Investigação, Desenvolvimento, Inovação e Criação Artística (IDI&CA) 2020 do Instituto Politécnico de Lisboa. Código de referência IPL/2020/DotCoffee/ISEL
dc.description.abstractCoffee ground (CG) waste is generated in huge amounts all over the world, constituting a serious environmental issue owing to its low biodegradability. Therefore, processes that simultaneously aim for its valorization while reducing its environmental impact are in great demand. In the current approach, blue luminescent carbon dots (C-dots) were produced in good chemical yields from CGs following hydrothermal carbonization methods under an extended set of reaction parameters. The remarkable fluorescent properties of the synthesized C-dots (quantum yields up to 0.18) allied to their excellent water dispersibility and photostability prompted their use for the first time as sensing elements for detection of noxious nitroanilines (NAs) in aqueous media. Very high levels of NA detection were achieved (e.g., limit of detection of 68 ppb for p-nitroaniline), being the regioisomeric selectivity attributed to its higher hyperpolarizability and dipole moment. Through ground-state and time-resolved fluorescence assays, a static fluorescence quenching mechanism was established. H-1 NMR titration data also strongly suggested the formation of ground-state complexes between C-dots and NAs.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationCOSTA, Alexandra I.; [et al] – Carbon dots from coffee grounds: synthesis, characterization, and detection of noxious nitroanilines. eISSN 2227-9040. Vol. 10, N.º 3 (2022), pp. 1-17.pt_PT
dc.identifier.doi10.3390/chemosensors10030113pt_PT
dc.identifier.eissn2227-9040
dc.identifier.urihttp://hdl.handle.net/10400.21/14681
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherMDPIpt_PT
dc.relationUIDB/00616/2022 - FCT/MCTESpt_PT
dc.relationUIDP/00616/2022 - FCT/MCTESpt_PT
dc.relationProjeto financiado no âmbito do Concurso de Projetos de Investigação, Desenvolvimento, Inovação & Criação Artística (IDI&CA) financiados pelo Instituto Politécnico de Lisboa. IPL/2020/DotCoffee/ISELpt_PT
dc.relation.publisherversionhttps://www.mdpi.com/2227-9040/10/3/113pt_PT
dc.subjectCoffee groundspt_PT
dc.subjectValorizationpt_PT
dc.subjectCarbon dotspt_PT
dc.subjectHydrothermal carbonizationpt_PT
dc.subjectMicrowave-assisted synthesispt_PT
dc.subjectFluorescencept_PT
dc.subjectSensorpt_PT
dc.subjectPollutants detectionpt_PT
dc.titleCarbon dots from coffee grounds: synthesis, characterization, and detection of noxious nitroanilinespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage17pt_PT
oaire.citation.issue3pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titleChemosensorspt_PT
oaire.citation.volume10pt_PT
person.familyNameCosta
person.familyNameBarata
person.familyNamePrata
person.givenNameAlexandra
person.givenNamePatrícia
person.givenNameJosé Virgílio
person.identifier1090399
person.identifier191765
person.identifier.ciencia-id4212-F7BF-D971
person.identifier.ciencia-idC019-9F30-0F99
person.identifier.ciencia-idC11A-9130-8981
person.identifier.orcid0000-0002-5518-6506
person.identifier.orcid0000-0001-8274-633X
person.identifier.orcid0000-0002-9068-2847
person.identifier.ridB-7214-2008
person.identifier.scopus-author-id8968446100
person.identifier.scopus-author-id8968446000
person.identifier.scopus-author-id9276778400
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication5f3891cc-260d-41d3-b803-4fd17e3734bd
relation.isAuthorOfPublication4ab8a01f-c11d-4b3b-b0cf-b21e5b634170
relation.isAuthorOfPublication15e229f3-a619-4931-87eb-799091dc1601
relation.isAuthorOfPublication.latestForDiscovery15e229f3-a619-4931-87eb-799091dc1601

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