MXene Nanosheets Decorated with Pt Nanostructures for the Selective Electrochemical Detection of Quercetin

Abstract

Electrochemical detection (ECD) technique has been deemed to be an effective method for detection. However, low sensitivity and poor anti-interference ability restrict its widespread use in quercetin detection. Herein, a coral reef-like Pt-decorated MXene composite is developed to construct a sensitive Pt-MXene/GCE electrode to achieve accurate detection for quercetin. The multilayer structure of MXene in the complex provides sufficient active sites for the electrochemical reaction and promotes electron transfer, leading to reduction in electrochemical impedance. The electrochemical behavior of quercetin on the Pt-MXene/GCE electrode reveals that the electrochemical redox process involves the participation of the two-electron/doubleproton reaction process. As expected, the Pt-MXene/GCE electrode exhibits excellent stability, repeatability, reproducibility, and selectivity and shows accurate detection ability in actual application. In addition, the Pt-MXene/GCE electrode possesses a low limit of detection and high sensitivity, which is superior than most of the previous reports. This work provides a promising strategy for selective ECD of quercetin, which would give guidance for the fabrication of a highly selective sensor with outstanding sensitivity.

A Bifunctional Novel Bipyridine Bridged Dicobaloxime Complex for Electrochemical Proton Reduction and Toxic Metanil Yellow Dye Detection

“…[27] This interaction between the g-CN/Co modified Au electrode and Metanil yellow results in enhanced Cyclic Voltammetry (CV) and Differential Pulse Voltammetry (DPV) signals at Au electrode by supporting an electron or proton reaction process. [14,15] A hopping mechanism electron transfer between the dye molecules and the transducer is proposed in the presence of a multilayer mediator. In hopping electronic transport, the respective dyes on oxidation lose electrons into the polarized atoms of Cobalt (Co) as a consequence of the applied positive potential on Au electrode.…”

“…To improve their sensing performance, the metal complexes can be incorporated into the carbon based nanomaterials like GO, rGO, g-C 3 N 4, MXenes etc. [13][14][15] Among them graphitic carbon nitride (g-C 3 N 4 ) has attracted the scientists in recent time due to its main advantages like possessing high surface area and showing good conductivity, which can play a vital role in electrochemical detection. [16,17] Metanil yellow (Figure 1) (sodium salt of m-[(p-anilinophenyl) azo] benzene sulphonic acid), an azo dye is a highly toxic compound that is used extensively in the food industry as coloring substance.…”

Insights in Electrochemical Determination of Quercetin in Peach Vinegar by the Hexagonal Platinum Nanocrystal

“…The electrochemical detection method has emerged as a promising means to identify specific constituents in solutions, owing to its heightened sensitivity, instantaneous feedback, and cost-effectiveness. − Through an effective chemical reaction on the surface of the electrocatalyst, a microcurrent can be formed, and the trace component can be detected by an amplification of the current signal. However, there are some challenges that must be addressed.…”

An Enhanced Photosensitive Sensor Based on ITO/MWCNTs@Polymer Composite@BiVO4 for Quercetin Detection

“…electrochemical- [18][19][20] and photoelectrochemical- [21,22] based sensors have been frequently used for quercetin analysis to date. Each of these techniques exhibit both superiorities and deficiencies.…”