基于ZnCr-LDH/VC修饰电极的电化学传感器检测乙霉威

王晓云; 付爱民; 胡强红

doi:10.11949/0438-1157.20251360

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基于ZnCr-LDH/VC修饰电极的电化学传感器检测乙霉威

能源和环境工程 | 更新时间：2026-08-21

- 基于ZnCr-LDH/VC修饰电极的电化学传感器检测乙霉威
- Electrochemical sensor based on ZnCr-LDH/VC modified electrode for detection of diethofencarb
- 化工学报 2026年77卷第7期页码：4241-4252
- 作者机构：
  
  1.福建理工大学城市与环境学院，福建福州 350007
  2.福建宁德核电有限公司，福建宁德 355220
- 作者简介：
  
  王晓云(1978—)，女，硕士，副教授，541981557@qq.com
- 基金信息：
- DOI：10.11949/0438-1157.20251360
  中图分类号： TQ 13;TB 331;O 657.1
- 收稿：2025-12-03，
  
  修回：2026-01-18，
  
  网络首发：2026-08-20，
  
  纸质出版：2026-07-25
- 稿件说明：
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王晓云, 付爱民, 胡强红. 基于ZnCr-LDH/VC修饰电极的电化学传感器检测乙霉威[J]. 化工学报, 2026, 77(7): 4241-4252

WANG Xiaoyun, FU Aimin, HU Qianghong. Electrochemical sensor based on ZnCr-LDH/VC modified electrode for detection of diethofencarb[J]. CIESC Journal, 2026, 77(7): 4241-4252
王晓云, 付爱民, 胡强红. 基于ZnCr-LDH/VC修饰电极的电化学传感器检测乙霉威[J]. 化工学报, 2026, 77(7): 4241-4252 DOI： 10.11949/0438-1157.20251360.

WANG Xiaoyun, FU Aimin, HU Qianghong. Electrochemical sensor based on ZnCr-LDH/VC modified electrode for detection of diethofencarb[J]. CIESC Journal, 2026, 77(7): 4241-4252 DOI： 10.11949/0438-1157.20251360.

摘要

通过水热法结合超声处理成功构建了锌铬层状双氢氧化物/碳化钒（ZnCr-LDH/VC）复合材料，并以此修饰玻碳电极（GCE），研制了一种用于检测杀菌剂乙霉威（diethofencarb，DFC）的高性能电化学传感器。采用X射线衍射（XRD）、拉曼光谱（Raman）、X射线光电子能谱（XPS）和透射电子显微镜（TEM）等手段对材料结构及形貌进行表征，证实ZnCr-LDH与VC形成了具有协同增强效应的复合结构。电化学测试结果表明，ZnCr-LDH/VC/GCE具有优异的导电性和催化活性，显著提升了DFC的电化学响应。在优化条件下，该传感器对DFC的氧化反应受吸附控制，涉及单电子单质子过程，其差分脉冲伏安（DPV）响应在0.01~232 μmol·L

-1

内呈现良好线性关系，检出限（LOD）低至1.3 nmol·L

-1

（S/N=3）。该传感器具有良好的抗干扰性、重现性和稳定性，并成功应用于市售蔬菜水果中DFC残留的实际检测，加标回收率为95.60%~110.00%，相对标准偏差（RSD）小于5%（

=3），为农药残留的快速灵敏检测提供了可靠平台。

Abstract

A zinc-chromium layered double hydroxide/vanadium carbide (ZnCr-LDH/VC) composite material was constructed

via

a hydrothermal method combined with ultrasonic treatment. This composite was used to modify a glassy carbon electrode (GCE) to develop a high-performance electrochemical sensor for the detection of the fungicide diethofencarb (DFC

). The structure and morphology of the material were characterized by X-ray diffraction (XRD)

Raman spectroscopy

X-ray photoelectron spectroscopy (XPS)

and transmission electron microscopy (TEM)

confirming that ZnCr-LDH and VC form a composite structure with a synergistic enhancement effect. Electrochemical test results demonstrated that the ZnCr-LDH/VC/GCE exhibited excellent conductivity and catalytic activity

significantly enhancing the electrochemical response to DFC. Under optimized conditions

the oxidation reaction of DFC on the sensor was determined to be an adsorption-controlled process involving a one-electron

one-proton transfer. The differential pulse voltammetry (DPV) response showed a good linear relationship in the concentration range of 0.01—232 μmol·L

-1

with a detection limit (LOD) as low as 1.3 nmol·L

-1

(S/N=3). The sensor displayed excellent anti-interference ability

reproducibility

and stability. It was successfully applied to the practical detection of DFC residues in commercially available vegetables and fruits

with spiked recoveries ranging from 95.60% to 110.00% and relative standard deviations (RSD) below 5%. This work provides a reliable platform for the rapid and sensitive detection of pesticide residues.

关键词

Keywords

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