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Copper oxide immobilized clay nano architectures as an efficient electrochemical sensing platform for hydrogen peroxide
Journal of Chemical Sciences ( IF 1.7 ) Pub Date : 2020-05-26 , DOI: 10.1007/s12039-020-01778-1
Dharmendra Kumar Yadav , Vellaichamy Ganesan , Rupali Gupta , Mamta Yadav , Piyush Kumar Sonkar , Pankaj Kumar Rastogi

Abstract

An electrochemical sensor for hydrogen peroxide (H2O2) present in face bleach cream is fabricated using a composite based on bentonite (Bt) clay and copper oxide (CuO) nanoparticles (CuO-Bt). The CuO nanoparticles’ immobilization into Bt was carried out by a two-step process in which Cu2+ is ion-exchanged into Bt layers (Cu2+-Bt) in the first step followed by the chemical reaction of NaOH with Cu2+-Bt in the second step to get the target material, CuO nanoparticles immobilized Bt (CuO-Bt). The successful immobilization of CuO nanoparticles into Bt is investigated by a variety of techniques like scanning electron microscopy, transmission electron microscopy, FT-IR spectroscopy, UV-Vis spectroscopy, and electrochemical methods. The CuO-Bt composite is coated on a glassy carbon electrode and used as a selective electrochemical sensing platform for the determination of H2O2 based on the significant electrocatalytic property of CuO-Bt towards the H2O2 oxidation. This amperometric electrochemical sensor shows two linear detection ranges (5–50 μM and 50–10000 μM) with a limit of detection of 4.9 μM. The sensitivity is calculated to be 0.06 µA µM−1 cm−2. This electrochemical sensor exhibits high selectivity, stability, and practical applicability for the H2O2 determination in real samples.

Graphic Abstract

Schematic presentation of copper oxide immobilized clay nano architectures as an efficient electrochemical sensing platform for practical applicability of the H2O2 determination in face bleach cream.



中文翻译:

氧化铜固定化粘土纳米结构作为过氧化氢的有效电化学传感平台

摘要

使用基于膨润土(Bt)粘土和氧化铜(CuO)纳米粒子(CuO-Bt)的复合材料制造面霜中存在的过氧化氢(H 2 O 2)电化学传感器。通过两步过程将CuO纳米颗粒固定在Bt中,第一步是将Cu 2+离子交换成Bt层(Cu 2+ -Bt),然后进行NaOH与Cu 2+的化学反应。-Bt在第二步中获得目标材料,将CuO纳米粒子固定化Bt(CuO-Bt)。通过多种技术,例如扫描电子显微镜,透射电子显微镜,FT-IR光谱,UV-Vis光谱和电化学方法,研究了将CuO纳米颗粒成功固定在Bt中的方法。CuO的转Bt基因复合物涂布在玻碳电极,并用作选择性电化学感测平台H的判定2 Ò 2基于朝向为H的CuO-Bt基因的显著电属性2 ö 2氧化。该电流型电化学传感器显示两个线性检测范围(5-50μM和50-10000μM),检测极限为4.9μM。计算出的灵敏度为0.06 µA µM -1  cm -2。该电化学传感器对实际样品中的H 2 O 2测定具有很高的选择性,稳定性和实用性。

图形摘要

氧化铜固定粘土纳米结构的示意图,作为一种有效的电化学传感平台,可用于在面霜中测定H 2 O 2的实际适用性。

更新日期:2020-05-26
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