Document Type

Journal Article

Department/Unit

Department of Chemistry

Title

Electrogenerated chemiluminescence of anatase TiO2 nanotubes film

Language

English

Abstract

Highly ordered titanium dioxide (TiO2) nanotubes film was successfully synthesized via anodic oxidation of a Ti foil in an ammonium fluoride-based ethylene glycol solution. The electrogenerated chemiluminescence (ECL) behavior of the resulting TiO2 nanotubes film was subsequently studied. Strong ECL emission was observed at -1.40 V (vs. Ag/AgCl) and the ECL spectrum displayed three emission peaks which were bathochromatically shifted by ca. 140 nm as compared to its corresponding photoluminescence (PL) emission peaks, indicating that the surface state plays an important role in the emission process. The ECL emission can also occur in a deareated solution attributing to the surface adsorbed O2 molecules. The ECL emission intensity was quenched by dopamine and greatly enhanced in the presence of dissolved O 2 and H2O2, making it possible to detect these analytes. The TiO2 nanotubes film has been successfully applied to determine the dissolved O2 content in river and pond water samples, the H2O2 concentration in commercial disinfectant samples and the dopamine concentration in commercial dopamine injections with satisfactory results. The plausible ECL mechanisms of TiO2 nanotubes film in aqueous solution are discussed. © 2011 Elsevier B.V. All rights reserved.

Keywords

Electrochemiluminescence, Nanotubes, Semiconductor, Sensor, TiO2

Publication Date

2011

Source Publication Title

Talanta

Volume

85

Issue

1

Start Page

56

End Page

62

Publisher

Elsevier

DOI

10.1016/j.talanta.2011.03.011

ISSN (print)

00399140

ISSN (electronic)

18733573

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