A glassy carbon electrode modified with gold nanoparticle-encapsulated graphene oxide hollow microspheres for voltammetric sensing of nitrite

被引：0
作者：
Fuhua Zhang
Yawen Yuan
Yiqun Zheng
Hua Wang
Tonghao Liu
Shifeng Hou
机构：
[1] Shandong University,School of Chemistry and Chemical Engineering
[2] Shandong University,National Engineering Research Center for Colloidal Materials
[3] Jining Research Center for Carbon Nanomaterials,undefined
来源：
Microchimica Acta | 2017年 / 184卷
关键词：
Composite materials; AuNPs; Cyclic voltammetry; Spray drying; Electrocatalysis;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Reduced graphene oxide hollow microspheres (rGO HMS) were encapsulated with gold nanoparticles (AuNPs) by spray drying. Scanning electron microscopy, transmission electron microscopy, X-ray diffraction and Raman spectroscopy were used to characterize the AuNP/rGO HMS. When placed on a glassy carbon electrode (GCE), it exhibits excellent electrochemical catalytic properties towards the oxidation of nitrite. The electrocatalytic properties were studied using various electrochemical techniques. Compared to AuNP-decorated graphene sheet based electrodes documented in the literature, the one presented here provides a larger surface area. This enhances the catalytic activity towards nitrite. The electrode, typically operated at a working potential of 0.82 V (vs. SCE), has a linear response in the 5.0 μM to 2.6 mM nitrate concentration range, and a detection limit as low as 0.5 μM (at an S/N ratio of 3).
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页码：1565 / 1572
页数：7
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