Reoxidation of graphene oxide: Impact on the structure, chemical composition, morphology and dye adsorption properties

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorCenter for Information Technology Renato Archer (CTI)-
Autor(es): dc.contributorDeutsches Elektronen-Synchrotron DESY-
Autor(es): dc.contributorUniversity of Hamburg-
Autor(es): dc.creatorZito, Cecilia A. [UNESP]-
Autor(es): dc.creatorPerfecto, Tarcísio M. [UNESP]-
Autor(es): dc.creatorMazon, Talita-
Autor(es): dc.creatorDippel, Ann-Christin-
Autor(es): dc.creatorKoziej, Dorota-
Autor(es): dc.creatorVolanti, Diogo P. [UNESP]-
Data de aceite: dc.date.accessioned2022-08-04T22:11:22Z-
Data de disponibilização: dc.date.available2022-08-04T22:11:22Z-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2021-11-29-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.apsusc.2021.150774-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/222084-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/222084-
Descrição: dc.descriptionThe chemical composition, oxidation degree, and sheet size strongly affect the properties of graphene oxide (GO). Therefore, much effort has been directed to improve the synthesis of GO and control its structure. Herein, we report the reoxidation of GO using milder conditions of a modified Hummers’ method, including shorter reaction times and a reduced proportion of chemicals to obtain the reoxidized GO (Ox-GO). The reoxidation impact was evaluated by studying the materials’ adsorption performance towards methylene blue (MB) and rhodamine B (RB). Compared to GO, Ox-GO presents a similar C/O ratio, increased interlayer spacing, smaller sheets with holes, a higher exfoliation degree, and slight differences in each oxygenated functional group. Our measurements evidence that Ox-GO has an MB adsorption capacity more than 30% higher than GO under different conditions of dye concentration and pH. Moreover, Ox-GO also shows a notable improvement in the RB removal for a high dye concentration, where the removal capacity is almost 40% higher than that of GO. The enhancements in the dyes’ removal are attributed to the increased accessible surface area of Ox-GO, which provides more sites for dyes’ adsorption.-
Descrição: dc.descriptionLaboratory of Materials for Sustainability (LabMatSus) São Paulo State University (UNESP), Rua Cristóvão Colombo 2265-
Descrição: dc.descriptionCenter for Information Technology Renato Archer (CTI), Rod. D. Pedro I, KM 143.6, 13069-901 Campinas-
Descrição: dc.descriptionDeutsches Elektronen-Synchrotron DESY, Notkestrasse 85-
Descrição: dc.descriptionCenter for Hybrid Nanostructures (CHyN) Institute of Nanostructure and Solid State Physics University of Hamburg, Luruper Chaussee149-
Descrição: dc.descriptionLaboratory of Materials for Sustainability (LabMatSus) São Paulo State University (UNESP), Rua Cristóvão Colombo 2265-
Idioma: dc.languageen-
Relação: dc.relationApplied Surface Science-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectCationic dye-
Palavras-chave: dc.subjectGraphite oxide-
Palavras-chave: dc.subjectPair distribution function-
Palavras-chave: dc.subjectTotal X-ray scattering-
Palavras-chave: dc.subjectWater treatment-
Título: dc.titleReoxidation of graphene oxide: Impact on the structure, chemical composition, morphology and dye adsorption properties-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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