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Enhanced cathodic electrogenerated chemiluminescence of luminol at a MXene-Nafion composite-modified electrode in neutral aqueous solution

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Title
Enhanced cathodic electrogenerated chemiluminescence of luminol at a MXene-Nafion composite-modified electrode in neutral aqueous solution
Author(s)
Ji Hyun Choi; Don Hui Lee; Won-Yong Lee
Publication Date
2023-05
Journal
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, v.936
Publisher
ELSEVIER SCIENCE SA
Abstract
Electrogenerated chemiluminescence (ECL) of luminol was studied on a two-dimensional titanium carbide (MXene)-Nafion composite-modified glassy carbon (GC) electrode in a neutral aqueous solution (pH 7). In the present work, Ti3C2Tx MXene was dispersed in a cation-exchange ionomer (Nation) and the resulting MXene-Nafion composite solution was drop-cast on the surface of GC electrode. Due to the strong electrocatalytic activity of the MXene towards the reduction reactions of oxygen and hydrogen peroxide, strong cathodic ECL emissions of luminol related to those reactions were obtained in a neutral aqueous solution. Based on the significant enhancement effect of hydrogen peroxide on the cathodic ECL, the present ECL sensor can detect hydrogen peroxide in the concentration range of 1.0 x 10-8 M similar to 1.0 x 10-3 M with a detection limit of 3.1 x 10-9 M (S/N = 3). Furthermore, the present ECL sensor exhibits good selectivity towards hydrogen peroxide against interfering species such as glucose, ascorbic acid and uric acid. Therefore, the present ECL sensor could offer a good opportunity to be employed as an alternative transducer for the oxidase-based biosensors in biological fluids.
URI
https://pr.ibs.re.kr/handle/8788114/13515
DOI
10.1016/j.jelechem.2023.117389
ISSN
1572-6657
Appears in Collections:
Center for Nanomedicine (나노의학 연구단) > 1. Journal Papers (저널논문)
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