Electrochemical determination of vanillin using 2D/2D heterostructure based on ZnCr-layered double hydroxide and g-CN

Santhosam Gopi; Sea-Fue Wang

doi:10.1007/s00604-023-05985-8

Electrochemical determination of vanillin using 2D/2D heterostructure based on ZnCr-layered double hydroxide and g-CN

Mikrochim Acta. 2023 Sep 29;190(10):423. doi: 10.1007/s00604-023-05985-8.

Authors

Santhosam Gopi¹, Sea-Fue Wang²

Affiliations

¹ Department of Materials and Mineral Resources Engineering, National Taipei University of Technology, Taipei, 106, Taiwan.
² Department of Materials and Mineral Resources Engineering, National Taipei University of Technology, Taipei, 106, Taiwan. sfwang@ntut.edu.tw.

PMID: 37775607
DOI: 10.1007/s00604-023-05985-8

Abstract

A ZnCr-LDH@g-CN composite was synthesized through a one-pot hydrothermal method to fabricate an effective sensor for detecting vanillin. The prepared material was investigated by using structural and physical studies. Cyclic voltammetry (CV) and differential pulse voltammetry (DPV) with applied potential (E_pa = + 0.68 V vs Ag/AgCl) were used to examine the electrochemical behavior of vanillin. The fabricated electrode exhibited a linear detection range of 0.001-143.2 μM, a low detection limit of 0.9 nM, sensitivity of 4.72 µA µM^-1 cm^-2, selectivity, stability, reproducibility (RSD = 4.40%), and repeatability (RSD = 4.46%). The optimized sensor was successfully applied to detect vanillin in real samples, including ice cream, chocolate, and water, and their recovery was 98.46-99.80%. Overall, the ZnCr-LDH@g-CN composite sensor offers a promising solution for precise vanillin detection.

Keywords: Differential pulse voltammetry; Electrochemical method; Graphitic carbon nitride (g-CN); Hydrothermal synthesis; Layered double hydroxide (LDH); Vanillin.