石墨烯
纳米棒
微电极
材料科学
电极
对苯二酚
纳米技术
量子点
电化学
化学工程
化学
有机化学
工程类
物理化学
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2020-01-31
卷期号:167 (2): 027541-027541
被引量:8
标识
DOI:10.1149/1945-7111/ab6cf5
摘要
The micro size and mechanical properties of carbon fiber make it an ideal electrode material, but the low surface area of carbon fiber promotes a poor electrochemical response. The combination of graphene quantum dots and metal oxide may modulate their chemical and electrochemical properties, resulting in synergistic signal amplification effect. In this study, a new robust nano-hybrid microelectrode was designed by modifying carbon fiber with boron-doped graphene quantum dots/ZnO nanorod for the electrocatalytic analysis of hydroquinone (HQ). Remarkably, high specific surface area of vertically-aligned ZnO nanorod promoted loading of high-density boron-doped graphene quantum dots. Electrochemical results showed that these modifications promoted a larger active surface area and electron transfer of the carbon fiber microelectrode, as well as enhancement of the electrocatalytic activity toward HQ. Under optimal conditions, the linear response range of the proposed microelectrode to HQ was 0.1 to 100 μM, and the limit of detection was 0.03 μM. The proposed microelectrodes show good repeatability, reproducibility and electrode stability. Furthermore, the proposed microelectrode was successfully applied to environmental water samples analysis of HQ, providing a new method for the efficient detection of HQ.
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