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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Synergy between Printex nano-carbons and silver nanoparticles for sensitive estimation of antioxidant activity

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Autor(es):
Raymundo-Pereira, Paulo A. [1] ; Campos, Anderson M. [1] ; Prado, Thiago M. [1] ; Furini, Leonardo N. [2] ; Boas, Naiza V. [1] ; Calegaro, Marcelo L. [1] ; Machado, Sergio A. S. [1]
Número total de Autores: 7
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Inst Quim Sao Carlos, CP 380, BR-13566590 Sao Paulo - Brazil
[2] UNESP Univ Estadual Paulista, Fac Ciencias & Tecnol, BR-19060900 Sao Paulo - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: Analytica Chimica Acta; v. 926, p. 88-98, JUL 5 2016.
Citações Web of Science: 9
Resumo

We report on the synthesis, characterization and applications of a Printex L6 carbon-silver hybrid nanomaterial (PC-Ag), which was obtained using a polyol method. In addition, we also highlight the use of Printex L6 nano-carbon as a much cheaper alternative to the use of carbon nanotubes and graphene. The silver nanoparticles (AgNP) were prepared directly on the surface of the Printex 6L carbon ``nanocarbon{''} material using ethylene glycol as the reducing agent. The hybrid nanomaterial was characterized by High-angle annular dark-field transmission electron microscopy (HAADF-TEM), energy-dispersive Xray spectroscopy (EDX), selected area electron diffraction (SAED), Raman spectroscopy and cyclic voltammetry. Optimized electrocatalytic activity on glassy carbon electrode was reached for the architecture GC/PC-Ag, the silver nanoparticles with size ranging between 1 and 2 nm were well edistributed throughout the hybrid material. The synergy between PC nano-carbons and AgNPs was verified by detection of gallic acid (GA) at a low applied potential (0.091 V vs. Ag/AgCl). GA detection was performed in a concentration range between 5.0 x 10(-7) and 8.5 x 10(-6) mol L-1, with a detection limit of 6.63 x 10(-8) mol L-1 (66.3 nmol L-1), which is considerably lower than similar devices. The approach for fabricating the reproducible GC/PC-Ag electrodes is entirely generic and may be explored for other types of (bio) sensors and devices. (C) 2016 Elsevier B.V. All rights reserved. (AU)

Processo FAPESP: 12/17689-9 - Preparação e caracterização de superfícies bifuncionais nanoestruturadas de Au-Pt obtidas via template para aplicação em sensores e biossensores
Beneficiário:Paulo Augusto Raymundo Pereira
Linha de fomento: Bolsas no Brasil - Doutorado
Processo FAPESP: 14/05197-0 - Desenvolvimento de sensores eletroquímicos à base de sílica mesoporosa contendo grafeno para a análise de bisfenol a
Beneficiário:Anderson Massahiro de Campos
Linha de fomento: Bolsas no Brasil - Iniciação Científica