材料科学
复合数
检出限
纳米颗粒
介电谱
电化学
循环伏安法
拉曼光谱
吸附
氧化物
纳米技术
纳米复合材料
作者
Shaogui He,Ying Ma,Jieyi Zhou,Jun Zeng,Xiaofang Liu,Zhi-Yong Huang,Xiaomei Chen,Xi Chen
出处
期刊:Talanta
[Elsevier]
日期:2019-01-01
卷期号:191: 400-408
被引量:14
标识
DOI:10.1016/j.talanta.2018.08.093
摘要
Abstract In the present work, a direct “touch” method was developed for attaching AuNPs with clean surface on the graphene-ionic liquid modified glassy carbon electrode (G-IL GCE). The morphology and composition of the thus-prepared AuNPs on G-IL GCE were characterized by scanning electron microscopy, energy-dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy. The results showed that AuNPs with interesting flower-like shapes are well dispersed on the G-IL film. Significantly, as it is a surfactant-free synthesis, the AuNPs are very clean and can be directly modified on a G-IL GCE without any pre-treatments. Comparing with the bare or even various AuNPs-G-IL mixtures modified GCEs, the proposed sensor exhibit better electrochemical activity with a higher peak current and a lower overpotential towards bisphenol A (BPA) oxidation. After optimization, a good linear relationship between current response and the concentration of BPA in the range of 0.01–1 and 1–60 μM were obtained, and the detection limit was as low as 4.8 nM. To testify the reliability, the thus-prepared AuNPs/G-IL GCE was used for determining the concentration of BPA in disposable paper cups, plastic bottles and noodles cups.
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