New application for the BiVO4 photoanode: A photoelectroanalytical sensor for nitrite

Autor(es)

Paulino Ribeiro, Francisco Wirley ^[1] ; Moraes, Fernando Cruz ^[1] ; Pereira, Ernesto Chaves ^[1] ; Marken, Frank ^[2] ; Mascaro, Lucia Helena ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Chem, BR-13565905 Sao Carlos - Brazil

^[2] Univ Bath, Dept Chem, Bath BA2 7AY, Avon - England

• Tipo de documento: Artigo Científico
• Fonte: Electrochemistry Communications; v. 61, p. 1-4, DEC 2015.
• Citações Web of Science: 16

Resumo

A simple and sensitive photoelectrochemical sensor based on the bismuth vanadate (BiVO4) photoanode coupled to visible light excitation was developed for nitrite detection. The BiVO4 was prepared by hydrothermal methods and used as photoelectroactive sensor. Photoexcitation with visible light allows nitrite anions to act as highly efficient hole scavenger at low potential. The photocurrent response increases linearly with nitrite concentration in the solution. The proposed device operates in the range of detection (2.5 to 100.0 mu mol L-1), with limit of detection (1.5 mu mol L-1), and with good reproducibility (4.1%) for nitrite analysis. (C) 2015 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 08/57872-1 - Instituto Nacional de Ciências dos Materiais em Nanotecnologia
• Beneficiário: Elson Longo da Silva
• Linha de fomento: Auxílio à Pesquisa - Temático
• Processo FAPESP: 14/06704-2 - Síntese e caracterização de vanadatos de bismuto para a fotólise da água e degradação de moléculas orgânicas
• Beneficiário: Francisco Wirley Paulino Ribeiro
• Linha de fomento: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
• Beneficiário: Elson Longo da Silva
• Linha de fomento: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs