Highly efficient determination of Mn2+ in Chinese liquor by using a novel electrochemical sensor based on TiO2-NH2@covalent organic framework nanocomposites

Liangyun Yu; Liangju Sun; Qi Zhang; Jingjing Zhang; Bairen Yang; Mingquan Huang; Yawen Zhou; Baocai Xu; Xiaoya Hu

doi:10.1039/d3ay00222e

Highly efficient determination of Mn²⁺ in Chinese liquor by using a novel electrochemical sensor based on TiO₂-NH₂@covalent organic framework nanocomposites

Anal Methods. 2023 Jun 1;15(21):2622-2630. doi: 10.1039/d3ay00222e.

Authors

Liangyun Yu^{1

2}, Liangju Sun¹, Qi Zhang³, Jingjing Zhang¹, Bairen Yang³, Mingquan Huang¹, Yawen Zhou¹, Baocai Xu¹, Xiaoya Hu⁴

Affiliations

¹ School of Light Industry, Beijing Technology and Business University, No. 11 Fucheng Road, Haidian District, Beijing 100048, P. R. China. zhqisir@163.com.
² China Food Flavor and Nutrition Health Innovation Center, Beijing Technology and Business University, No. 11 Fucheng Road, Haidian District, Beijing 100048, P. R. China.
³ School of Environmental Science and Engineering, Yancheng Institute of Technology, Yancheng, 224051, P. R. China.
⁴ College of Chemistry and Engineering, Yangzhou University, 88 South University Avenue, Yangzhou 225002, P. R. China.

PMID: 37194496
DOI: 10.1039/d3ay00222e

Abstract

This study developed an electrochemical sensor for the determination of Mn²⁺ in Chinese liquor by modifying a glass carbon electrode with TiO₂-NH₂@COF_DPTB, which was synthesized via the controllable growth of COF_DPTB onto the surface of TiO₂-NH₂ using the Schiff-base condensation reaction between 2,5-dimethoxyterephthalaldehyde and 1,3,5-tris(4-aminophenyl)benzene. The morphological and structural characterization studies of the proposed TiO₂-NH₂@COF_DPTB were carried out by SEM, TEM, HRTEM, EDX, BET, XRD and FTIR techniques. Owing to the excellent properties and the synergism between TiO₂ and COF_DPTB, the introduction of TiO₂-NH₂@COF_DPTB improved the electrochemical response significantly. By optimizing the experimental parameters, the sensor exhibited good linearity in the range of 0.1-1.0 nM and 0.08-10 μM with a detection limit of 2.83 × 10^-11 M and 9.50 × 10^-9 M, respectively, showing competitive performance for Mn²⁺ determination. Besides, the proposed sensor was successfully applied to Mn²⁺ detection in liquor samples, suggesting its practical application performance.