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

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...

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Bibliographic Details
Published inElectrochemistry communications Vol. 61; pp. 1 - 4
Main Authors Ribeiro, Francisco Wirley Paulino, Moraes, Fernando Cruz, Pereira, Ernesto Chaves, Marken, Frank, Mascaro, Lucia Helena
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.12.2015
Subjects
Bismuth vanadate
Hole scavenger
Nitrite
Photoelectrochemical sensor
Photoelectrochemical sensor
Bismuth vanadate
Nitrite
Hole scavenger
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Summary: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 100.0μmolL–1), with limit of detection (1.5μmolL–1), and with good reproducibility (4.1%) for nitrite analysis. •A new photoelectrochemical sensor based in BiVO4 semiconductor was developed.•BiVO4/FTO was applied in photoelectrochemical analysis of nitrite ions.•Nitrite ions act as the hole scavenger reducing the recombination process.•BiVO4/FTO exhibited good analytical performance in nitrite analysis.
ISSN:1388-2481
1873-1902
DOI:10.1016/j.elecom.2015.09.022