BIBLIOS

Tipo
Artigos em Revista

Tipo de Documento
Artigo Completo

Título
Titanate nanofibers sensitized with nanocrystalline Bi2S3 as new electrocatalytic materials for ascorbic acid sensor applications

Participantes na publicação
J.F. Cabrita (Author)
Virginia C Ferreira (Author)
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DE LISBOA
Dep. Química e Bioquímica
Dep. Química e Bioquímica
CQB
O.C. Monteiro (Author)
CQB

Resumo
tHere is described a new method for titanate nanofibers (TNF) modification with nanocrystalline semi-conducting bismuth sulphide (Bi2S3) nanoparticles in order to obtain new materials with innovativeelectrocatalytic properties. The TNF surface modification was achieved by in situ nucleation and growthof nanocrystalline metal sulphide particles through a single-source approach. Using bismuth diethyl-dithiocarbamate complex as the metal chalcogenide precursor, nanocrystalline of Bi2S3particles wereobtained over the TNF surface. The prepared materials were characterized and the results evidence thata thin layer of crystalline Bi2S3nanosheets is covering the TNF’ entire surface. After immobilization on aglassy carbon electrode, the nanocomposite structured surface was electrochemically characterized. Theability of the modified electrodes for sensor applications was tested towards the electrocatalysis for theascorbic acid oxidation reaction. The results obtained indicate that these are very interesting materials tobe used for sensing at pH 7, displaying a vitamin C linear response in the 1–10 mM concentration range.


Instituição
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DE LISBOA

Suporte
Electrochimica Acta

Identificadores da Publicação
ISSN - 0013-4686

Editora
Elsevier BV



Identificadores do Documento
DOI - https://doi.org/10.1016/j.electacta.2014.04.135
URL - http://dx.doi.org/10.1016/j.electacta.2014.04.135

Identificadores de Qualidade
SCIMAGO Q1 (2016) - 1.355 - Electrochemistry
SCOPUS Q1 (2013) - 1.435 - Electrochemistry
Web Of Science Q1 (2017) - 5.116 - ELECTROCHEMISTRY - SCIE

Keywords
Titanate nanofibers Nanocrystalline Bi2S3 Electroactive nanocomposites Ascorbic acid oxidation Electrochemical sensors

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