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Synthesis of ultrasmall cerium oxide nanoparticles in deep eutectic solvent and their application in an electrochemical sensor to detect dopamine in biological fluid.
Gomes-Junior, Paulo Cardoso; Longatto, Gustavo Patelli; de Lima Augusto, Karen Kenlderi; da Silveira Rocha, Josias; Piccin, Evandro; Fatibello-Filho, Orlando.
Afiliação
  • Gomes-Junior PC; Departamento de Química, Universidade Federal de São Carlos, São Carlos, SP, Brasil.
  • Longatto GP; Departamento de Química, Universidade Federal de São Carlos, São Carlos, SP, Brasil.
  • de Lima Augusto KK; Departamento de Química, Universidade Federal de São Carlos, São Carlos, SP, Brasil.
  • da Silveira Rocha J; Departamento de Química, Universidade Federal de São Carlos, São Carlos, SP, Brasil.
  • Piccin E; Departamento de Química, Universidade Federal de São Carlos, São Carlos, SP, Brasil.
  • Fatibello-Filho O; Departamento de Química, Universidade Federal de São Carlos, São Carlos, SP, Brasil. bello@ufscar.br.
Mikrochim Acta ; 191(7): 425, 2024 06 27.
Article em En | MEDLINE | ID: mdl-38926184
ABSTRACT
A solvothermal synthesis of ultrasmall cerium oxide nanoparticles (USCeOxNPs) with an average size of 0.73 ± 0.07 nm using deep eutectic solvent (DES) as a stabilizing medium at a temperature of 90 ºC is reported. Transmission electron microscopy (TEM) and energy dispersive spectroscopy (EDS) were used to morphologically characterize the USCeOxNPs. These revealed approximately spherical shapes with emission lines characteristic of cerium. Selected area electron diffraction (SAED) was used to determine the crystalline structure of the cerium oxide nanoparticles (CeO2NPs), revealing the presence of crystalline cubic structures. The USCeOxNPs-DES/CB film was characterized by scanning electron microscopy (SEM), which demonstrated the spherical characteristic of CB with layers slightly covered by DES residues. DES was characterized by Fourier transform infrared (FT-IR) and nuclear magnetic resonance (NMR), indicating its formation through hydrogen bonds between the precursors. An electrochemical sensor for dopamine (DA) determination in biological fluids was developed using the USCeOxNPs together with carbon black (CB). An enhanced current response was observed on DA voltammetric determination, and this can be attributed to the USCeOxNPs. This sensor displayed linear responses for DA in the range 5.0 × 10-7 mol L-1 to 3.2 × 10-4 mol L-1, with a limit of detection of 80 nmol L-1. Besides detectability, excellent performances were verified for repeatability and anti-interference. The sensor based on USCeOxNPs synthesized in DES in a simpler and environmentally friendly way was successfully applied to determine DA in biological matrix.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Dopamina / Cério / Técnicas Eletroquímicas Limite: Humans Idioma: En Revista: Mikrochim Acta Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Brasil País de publicação: Áustria
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Dopamina / Cério / Técnicas Eletroquímicas Limite: Humans Idioma: En Revista: Mikrochim Acta Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Brasil País de publicação: Áustria