一步共电沉积法制备铜纳米粒子-壳聚糖膜-碳纳米粒子-多壁碳纳米管复合材料用于吲哚-3-乙酸和水杨酸的电化学分析。

One-Step Co-Electrodeposition of Copper Nanoparticles-Chitosan Film-Carbon Nanoparticles-Multiwalled Carbon Nanotubes Composite for Electroanalysis of Indole-3-Acetic Acid and Salicylic Acid.

机构信息

College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha 410128, China.

College of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, China.

出版信息

Sensors (Basel). 2022 Jun 13;22(12):4476. doi: 10.3390/s22124476.

DOI:10.3390/s22124476

PMID:35746260

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9228024/

Abstract

A sensitive simultaneous electroanalysis of phytohormones indole-3-acetic acid (IAA) and salicylic acid (SA) based on a novel copper nanoparticles-chitosan film-carbon nanoparticles-multiwalled carbon nanotubes (CuNPs-CSF-CNPs-MWCNTs) composite was reported. CNPs were prepared by hydrothermal reaction of chitosan. Then the CuNPs-CSF-CNPs-MWCNTs composite was facilely prepared by one-step co-electrodeposition of CuNPs and CNPs fixed chitosan residues on modified electrode. Scanning electron microscope (SEM), transmission electron microscopy (TEM), selected area electron diffraction (SAED), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and linear sweep voltammetry (LSV) were used to characterize the properties of the composite. Under optimal conditions, the composite modified electrode had a good linear relationship with IAA in the range of 0.01-50 μM, and a good linear relationship with SA in the range of 4-30 μM. The detection limits were 0.0086 μM and 0.7 μM ( = 3), respectively. In addition, the sensor could also be used for the simultaneous detection of IAA and SA in real leaf samples with satisfactory recovery.

摘要

基于新型铜纳米粒子-壳聚糖膜-碳纳米粒子-多壁碳纳米管（CuNPs-CSF-CNPs-MWCNTs）复合材料，报道了一种用于同时灵敏电分析植物激素吲哚-3-乙酸（IAA）和水杨酸（SA）的方法。CNPs 通过壳聚糖的水热反应制备。然后，通过一步共电沉积固定在修饰电极上的 CuNPs 和 CNPs 来简便地制备 CuNPs-CSF-CNPs-MWCNTs 复合材料。采用扫描电子显微镜（SEM）、透射电子显微镜（TEM）、选区电子衍射（SAED）、能谱（EDS）、X 射线衍射（XRD）、傅里叶变换红外光谱（FT-IR）、循环伏安法（CV）、电化学阻抗谱（EIS）和线性扫描伏安法（LSV）对复合材料的性质进行了表征。在最佳条件下，该复合修饰电极对 IAA 在 0.01-50 μM 范围内具有良好的线性关系，对 SA 在 4-30 μM 范围内具有良好的线性关系。检测限分别为 0.0086 μM 和 0.7 μM（ = 3）。此外，该传感器还可用于实际叶片样品中 IAA 和 SA 的同时检测，具有令人满意的回收率。