A novel photoelectrochemical approach with "signal-off" pattern for anodic detection of sunset yellow in food samples based on Bi2WO6/TiO2 NTAs heterostructure nanocomposite

Fatemeh Bakhnooh; Majid Arvand

doi:10.1016/j.foodchem.2023.138070

A novel photoelectrochemical approach with "signal-off" pattern for anodic detection of sunset yellow in food samples based on Bi2WO6/TiO2 NTAs heterostructure nanocomposite

Food Chem. 2024 Apr 16:438:138070. doi: 10.1016/j.foodchem.2023.138070. Epub 2023 Nov 23.

Authors

Fatemeh Bakhnooh¹, Majid Arvand²

Affiliations

¹ Electroanalytical Chemistry Laboratory, Faculty of Chemistry, University of Guilan, Namjoo Street, P.O. Box: 1914-41335, Rasht, Iran.
² Electroanalytical Chemistry Laboratory, Faculty of Chemistry, University of Guilan, Namjoo Street, P.O. Box: 1914-41335, Rasht, Iran. Electronic address: arvand@guilan.ac.ir.

PMID: 38016299
DOI: 10.1016/j.foodchem.2023.138070

Abstract

A new and signal-off photoelectrochemical (PEC) sensing platform utilizing TiO₂ nanotube arrays (NTAs) coated with Bi₂WO₆ nanoparticles (NPs) has been successfully developed for the highly sensitive detection of sunset yellow (SY). The interaction between SY and Bi₂WO₆ NPs leads to substantial steric hindrance, resulting in a noticeable decrease in the photocurrent signal. The proposed PEC sensor demonstrates quantitative detection capabilities for SY across a wide liner range of 10 fM to 100 µM with an ultralow detection limit (LOD) of 0.78 fM. Furthermore, the designed PEC sensor exhibits several notable advantages, including robust anti-interference properties, desirable repeatability, good reproducibility, and excellent stability. Finally, the designed PEC sensor was applied to determine SY in diverse real samples without any remarkable difference compared to the UV-Vis reference method.

Keywords: Bi(2)WO(6) nanoparticles; Photoelectrochemical sensing platform; Sunset yellow; TiO(2) nanotube arrays.

MeSH terms

Biosensing Techniques* / methods
Electrochemical Techniques / methods
Limit of Detection
Nanocomposites*
Nanotubes* / chemistry
Reproducibility of Results

Substances

6-hydroxy-5-((p- sulfophenyl)azo)-2-naphthalenesulfonic acid disodium salt
bismuth wolframate