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In the present work, a novel sensor for luminol electrochemiluminescence (ECL) was constructed on the base of a C-doped titanium oxide amorphous semiconductor electrode. The morphology, structural and electrochemical properties of the electrode was characterized by X-Ray diffraction, X-Ray photoelectron spectroscopy and electrochemical methods. The ECL behavior of luminol excited by hot electrons injected from C-doped oxide film-covered electrodes in aqueous medium has been investigated in B-R buffer solution (pH = 9) when linear sweep cyclic voltammetry (CV) was applied. Two ECL peaks were observed at -1.0 V (vs. Ag/AgCl, reduction process) and -0.75 V (vs. Ag/AgCl, oxidation process). The possible mechanism was discussed. The C-doped Ti oxide electrode shows excellent properties for sensitive determination of luminol with good reproducibility and stability. The linear response of luminol was in the range of 1 × 10-8 to 9 × 10-8 mol/L with the detection limit of 3 × 10-9 mol/L (S/N = 3). Since luminol is one of the most useful ECL probe, many bioactive compounds which can be labeled by luminol are able to be detected by using the proposed method. © 2010 Elsevier Ltd.
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Electrochimica Acta
ISSN: 0013-4686
Year: 2010
Issue: 1
Volume: 56
Page: 74-79
3 . 6 5
JCR@2010
5 . 5 0 0
JCR@2023
JCR Journal Grade:1
CAS Journal Grade:1
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ESI Highly Cited Papers on the List: 0 Unfold All
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30 Days PV: 2
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