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Synthesis of Polyaniline/Graphene Nanocomposites and Electrochemical Sensing Performance for Formaldehyde
Current Analytical Chemistry ( IF 1.8 ) Pub Date : 2020-05-31 , DOI: 10.2174/1573411014666181115125050
Lizhai Pei 1 , Yue Ma 1 , Fanglv Qiu 1 , Feifei Lin 1 , Chuangang Fan 1 , Xianzhang Ling 2
Affiliation  

Background: Formaldehyde has been recognized as the important liquid environmental pollutant which can cause health risk. Great effort has been devoted to detecting formaldehyde in liquid environment. It is of important significance to develop a sensitive method for measuring formaldehyde from the environmental and health viewpoints.

Methods: Polyaniline/graphene nanocomposites have been prepared by a simple in-situ polymerization process using graphene and aniline as the raw materials. The nanocomposites were characterized by Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD) and Transmission Electron Microscopy (TEM) and high-resolution TEM (HRTEM). The polyaniline/graphene nanocomposites were applied to modify the glassy carbon electrode for the detection of formaldehyde by cyclic voltammetry (CV) method.

Results: The polyaniline/graphene nanocomposites consist of hexagonal graphite phase. The polyaniline particles are dispersed and attached to the surface of the graphene nanosheet-shaped morphology. The thickness of the graphene nanosheets is less than 50 nm. The electrocatalytic performance of the polyaniline/graphene nanocomposites modified glassy carbon electrode towards formaldehyde was obtained. The potential of the irreversible oxidation peak is located at +0.19 V. The polyaniline/graphene nanocomposites modified glassy carbon electrode shows a wide linear range of 0.0001-2 mM and low detection limit of 0.085 μM.

Conclusion: The nanocomposites modified glassy carbon electrode possesses good reproducibility and stability. The polyaniline/graphene nanocomposites show great application potential for the electrochemical sensors to detect formaldehyde in liquid environments.



中文翻译:

聚苯胺/石墨烯纳米复合材料的合成及对甲醛的电化学传感性能

背景:甲醛已被公认为是重要的液体环境污染物,可能导致健康风险。致力于检测液态环境中的甲醛。从环境和健康的角度出发,开发一种测定甲醛的灵敏方法具有重要意义。

方法:以石墨烯和苯胺为原料,通过简单的原位聚合工艺制备了聚苯胺/石墨烯纳米复合材料。纳米复合材料的特征在于扫描电子显微镜(SEM),X射线衍射(XRD)和透射电子显微镜(TEM)和高分辨率TEM(HRTEM)。聚苯胺/石墨烯纳米复合材料用于修饰玻碳电极,用于通过循环伏安法(CV)检测甲醛。

结果:聚苯胺/石墨烯纳米复合材料由六方石墨相组成。聚苯胺颗粒分散并附着在石墨烯纳米片状形态的表面上。石墨烯纳米片的厚度小于50nm。获得了聚苯胺/石墨烯纳米复合改性玻璃碳电极对甲醛的电催化性能。不可逆氧化峰的电势位于+0.19V。聚苯胺/石墨烯纳米复合材料改性玻璃碳电极的线性范围为0.0001-2 mM,检测下限为0.085μM。

结论:纳米复合修饰玻碳电极具有良好的重现性和稳定性。聚苯胺/石墨烯纳米复合材料在电化学传感器检测液态环境中的甲醛方面显示出巨大的应用潜力。

更新日期:2020-05-31
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