Construction of rose flower-like NiCo-LDH electrode derived from bimetallic MOF for highly sensitive electrochemical sensing of hydrazine in food samples

Xin Tang; Shan Zhao; Jiaying Wu; Zhiyuan He; Yu Zhang; Ke Huang; Zhirong Zou; Xiaoli Xiong

doi:10.1016/j.foodchem.2023.136648

Construction of rose flower-like NiCo-LDH electrode derived from bimetallic MOF for highly sensitive electrochemical sensing of hydrazine in food samples

Food Chem. 2023 Nov 30:427:136648. doi: 10.1016/j.foodchem.2023.136648. Epub 2023 Jul 1.

Authors

Xin Tang¹, Shan Zhao², Jiaying Wu², Zhiyuan He², Yu Zhang², Ke Huang¹, Zhirong Zou³, Xiaoli Xiong⁴

Affiliations

¹ Key Laboratory of Land Resources Evaluation and Monitoring in Southwest, Ministry of Education, Sichuan Normal University, Chengdu 610068, Sichuan, China; College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610068, Sichuan, China.
² College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610068, Sichuan, China.
³ Key Laboratory of Land Resources Evaluation and Monitoring in Southwest, Ministry of Education, Sichuan Normal University, Chengdu 610068, Sichuan, China; College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610068, Sichuan, China. Electronic address: zouzhirong@sicnu.edu.cn.
⁴ Key Laboratory of Land Resources Evaluation and Monitoring in Southwest, Ministry of Education, Sichuan Normal University, Chengdu 610068, Sichuan, China; College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610068, Sichuan, China. Electronic address: xiongxiaoli2000@163.com.

PMID: 37399644
DOI: 10.1016/j.foodchem.2023.136648

Abstract

It is necessary to efficient detection hydrazine in food. Exploring highly sensitive, low-cost and fast response electrochemical hydrazine sensing methods has been a challenge in this field. In this paper, a conformal transformation method is used to prepare rose flower-like NiCo-LDH derivating from the bimetallic NiCo-MOFs, and the N₂H₄ sensing platform with a large electrocatalytic area, high conductivity and good stability was constructed. Based on the synergy between Ni and Co and the remarkable catalytic activity of the rough 3D flower-like structure, the N₂H₄ sensor has a linear response in the concentration range of 0.001-1 mmol/L and 1-7 mmol/L, with a sensitivity of 5342 μA L mmol^-1 cm^-2 and 2965 μA L mmol^-1 cm^-2 (S/N = 3), respectively, and low limit of detection of 0.043 μmol/L. This study opens a new door for the successful application of electrochemical sensors to detect N₂H₄ in real food samples.

Keywords: Electrochemical sensor; Food sample; Hydrazine; MOF derived; NiCo-LDH.

MeSH terms

Cluster Analysis
Electric Conductivity
Electrochemical Techniques*
Electrodes
Flowers*