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直接绿6修饰碳糊电极对有害儿茶酚和对苯二酚的高效电化学传感

An efficient electrochemical sensing of hazardous catechol and hydroquinone at direct green 6 decorated carbon paste electrode.

作者信息

Chetankumar K, Kumara Swamy B E, Sharma S C, Hariprasad S A

机构信息

Department of P.G. Studies and Research in Industrial Chemistry, Kuvempu University, Jnanasahyadri, Shankaraghatta, 577451, Shivamogga, Karnataka, India.

National Assessment and Accreditation Council (NAAC), Naagarabhaavi, Bengaluru, 560072, Karnataka, India.

出版信息

Sci Rep. 2021 Jul 23;11(1):15064. doi: 10.1038/s41598-021-93749-w.

DOI:10.1038/s41598-021-93749-w
PMID:34301960
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8302748/
Abstract

In this proposed work, direct green 6 (DG6) decorated carbon paste electrode (CPE) was fabricated for the efficient simultaneous and individual sensing of catechol (CA) and hydroquinone (HY). Electrochemical deeds of the CA and HY were carried out by cyclic voltammetry (CV) and differential pulse voltammetry (DPV) at poly-DG6-modfied carbon paste electrode (Po-DG6-MCPE). Using scanning electron microscopy (SEM) studied the surface property of unmodified CPE (UCPE) and Po-DG6-MCPE. The decorated sensor displayed admirable electrocatalytic performance with fine stability, reproducibility, selectivity, low limit of detection (LLOD) for HY (0.11 μM) and CC (0.09 μM) and sensor process was originated to be adsorption-controlled phenomena. The Po-DG6-MCPE sensor exhibits well separated two peaks for HY and CA in CV and DPV analysis with potential difference of 0.098 V. Subsequently, the sensor was practically applied for the analysis in tap water and it consistent in-between for CA 93.25-100.16% and for HY 97.25-99.87% respectively.

摘要

在这项拟议的工作中，制备了直接绿6（DG6）修饰的碳糊电极（CPE），用于高效同时和单独检测儿茶酚（CA）和对苯二酚（HY）。在聚-DG6修饰的碳糊电极（Po-DG6-MCPE）上，通过循环伏安法（CV）和差分脉冲伏安法（DPV）对CA和HY进行电化学行为研究。利用扫描电子显微镜（SEM）研究了未修饰碳糊电极（UCPE）和Po-DG6-MCPE的表面性质。修饰后的传感器表现出令人钦佩的电催化性能，具有良好的稳定性、重现性、选择性，对HY的检测限低（LLOD）为0.11 μM，对CC为0.09 μM，且传感过程源于吸附控制现象。在CV和DPV分析中，Po-DG6-MCPE传感器对HY和CA表现出分离良好的两个峰，电位差为0.098 V。随后，该传感器实际应用于自来水分析，对CA的回收率在93.25%至100.16%之间，对HY的回收率在97.25%至99.87%之间。

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