The Sensitized Solid‐Phase Electrochemiluminescence of Electrodeposited Poly‐Luminol/Aniline on AuAg/TiO₂ Nanohybrid Functionalized Electrode for Flow Injection Analysis

Abstract

In this study, a copolymer of luminol with aniline is electrochemically deposited onto the AuAg/TiO2 nanohybrid functionalized indium tin oxide coated glass. It is used as a reagentless electrochemiluminescent (ECL) electrode for flow‐injection‐analysis (FIA). The properties of this solid phase ECL electrode are characterized by cyclic voltammetry, electrochemical impedance spectroscopy and scanning electron microscopy etc. It has stronger ECL emission, sensitive response for target analytes and excellent stability. The so‐prepared ECL electrode shows sensitive response to reactive oxygen species thereafter to be applied for determination of hydrogen peroxide with FIA mode. Under optimized conditions, a mass detection limit of 0.822 pg of hydrogen peroxide was obtained. Thus the hydrogen peroxide residues in samples were detected with satisfactory result.

Titanium Dioxide Nanomaterials for Sensor Applications

“…With the use of AuAg/ TiO 2 NPs, a good mass detection limit of 1.17 × 10 −13 g was achieved. 435 It is worth noting that most studies have focused on TiO 2 NTs as the substrate of the sensor over the past 4 years. The reason, as aforementioned, probably lies in the distinct tubular features of TiO 2 NTs so that TiO 2 nanotubes-based ECL sensors can be used to amplify the detected signals.…”

An Ultrasensitive ECL Sensor Based on Conducting Polymer/Electrochemically Reduced Graphene Oxide for Non‐Enzymatic Detection in Biological Samples

“…As we said above Aniline is a substructure of Luminol, so the copolymerization of Aniline with Luminol is possible applying the same synthetic methods as used for the electro polymerization of each compound via the presence of an aromatic ring bonded to the amine group in their structures. Poly (Luminol/Aniline) (PLA), the copolymer films were executed on the surface of electrode, not only presented improved properties over the pure polyluminol film but also a platform for the application of biologically active substance in the design of biosensor …”

A Highly Sensitive Electrochemiluminescence Choline Biosensor Based on Poly(aniline‐luminol‐hemin) Nanocomposites

“…Among the existing conjugated polymers, polyaniline is one of the most widely studied since the materials have the merits of high conductivity and stability, simple synthesis and cheap raw materials . Based on the structural analogy between aniline and luminol, a copolymerization of aniline and luminol has been shown to be an effective approach to construct luminol‐based ECL biosensors . For example, Wang et al.…”

“…Wei et al. prepared a copolymer of luminol with aniline by electrochemically deposition that was used as a reagentless ECL electrode for flow‐injection‐analysis.…”