Electrochemical Detection of 4-p-nitrophenol Based on TiO2NPs / RGO / AuNPs Composite Modified Glassy Carbon Electrode
Electrochemical Detection of 4-p-nitrophenol Based on TiO2NPs / RGO / AuNPs Composite Modified Glassy Carbon Electrode
复制标题
基于TiO2NPs/RGO/AuNPs复合修饰玻碳电极的电化学检测4-对硝基苯酚
DOI：
10.20964/2018.09.31
复制
发表时间：
2018-09-01
影响因子：
1.5
通讯作者：
Sang, Shengbo
中科院分区：
文献类型：
--
作者：
Cheng, Yongqiang;Jiu, Linna;Sang, Shengbo
采用TiO（2）NPs/RGO/AuNPs修饰玻碳电极作为电化学传感器，对痕量的4-对硝基苯酚（4-NP）进行了检测。采用场发射扫描电子显微镜（FE-SEM）对复合材料的表面形态进行了表征。采用循环伏安法（CV）和电化学阻抗谱（EIS）分析了复合电极的电化学特性。由于复合材料的大比表面积和强导电性，该修饰电极表现出优异的电化学性能。采用微分脉冲伏安法（DPV）和方波伏安法（SWV）对对硝基苯酚进行了痕量检测。两种方法的峰电流与4-NP浓度呈良好的线性关系。DPV法的检测范围为0.5 ~ 100 μ mol/L，检出限为0.03 μ mol/L。当采用SWV时，检测范围为0.5 ~ 100 μ mol/L，检出限为0.08 μ mol/L。该电化学传感器具有检测范围大、检测限低、稳定、分析简单、快速等优点。基于这些特性，该传感器可以被认为是用于检测4-NP的潜在传感器。
A glassy carbon electrode modified with TiO(2)NPs/RGO/AuNPs was used as an electrochemical sensor to detect trace amounts of 4-p-nitrophenol (4-NP). The surface morphology of the composites was characterized by field-emission scanning electron microscopy (FE-SEM). The electrochemical characteristics of the composite electrode were analyzed by cyclic voltammetry(CV) and electrochemical impedance spectroscopy(EIS). The modified electrode exhibited outstanding electrochemical performance due to the large specific surface area and strong conductivity of composite material. The differential pulse voltammetry(DPV) and square wave voltammetry(SWV) were used for the trace detection of p-nitrophenol. The peak current of the two methods showed a high linear relationship with the 4-NP concentration. The detection range applied DPV method was 0.5-100 mu mol/L, the detection limit was 0.03 mu mol/L. When SWV was employed, detection range was from 0.5 to 100 mu mol/L, The detection limit was 0.08 mu mol/L. In this study, the electrochemical sensor had the advantage of large detection range, low detection limit, stable, simple and fast analysis. Based on these characteristics, the sensor can be considered as a potential sensor for the detection of 4-NP.