Ultrasensitive and ultrawide range electrochemical determination of bisphenol A based on PtPd bimetallic nanoparticles and cationic pillar[5] arene decorated graphene
Ultrasensitive and ultrawide range electrochemical determination of bisphenol A based on PtPd bimetallic nanoparticles and cationic pillar[5] arene decorated graphene
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基于PtPd双金属纳米颗粒和阳离子柱[5]芳烃修饰石墨烯的超灵敏超宽范围电化学测定双酚A
DOI：
10.1016/j.jelechem.2019.113487
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发表时间：
2019-12-15
影响因子：
4.5
通讯作者：
Li, Can-Peng
中科院分区：
文献类型：
--
作者：
Liang, Huan;Zhao, Yuting;Li, Can-Peng
提出了一种基于PtPd纳米粒子（PtPd NPs）和阳离子柱[5]芳烃（CP 5）修饰石墨烯的双酚A（BPA）超灵敏、超宽范围电化学传感平台。通过报道的测定合成了CP 5修饰的还原氧化石墨烯（RGO）（CP 5@RGO）。然后在室温下通过简单的方法制备了PtPd NPs负载的CP5@RGO纳米复合材料（PtPd-CP 5 @RGO）。采用EDX、FT-IR、XRD、TG、XPS、Zeta电位、TEM、AFM等技术对材料进行了表征。PtPd-CP 5 @RGO修饰玻碳电极（GCE）对BPA氧化的电流响应高于Pt NPs-、Pd NPs-或CP 5-修饰的GCE。利用PtPd-CP 5 @RGO修饰的GCE电化学传感器，通过微分脉冲伏安法测定BPA。该传感器产生了较宽的线性范围为0.01-50 μ M和50-1000 μ M，分别与检测下限为3.3 nM（S/N = 3）的BPA测定。该传感器具有重现性好、稳定性好、选择性好等优点，可用于真实的样品中BPA的测定。BPA和CP 5可能主要通过静电和疏水作用等超分子相互作用形成稳定的复合物。
This study proposed an ultrasensitive and ultrawide range electrochemical sensing platform based on PtPd bimetallic nanoparticles (PtPd NPs) and cationic pillar [5] arene (CP5) decorated graphene for bisphenol A (BPA). CP5-decorated reduced graphene oxide (RGO) (CP5@RGO) was synthesized via a reported assay. PtPd NPs-loaded CP5@RGO nanocomposites (PtPd-CP5@RGO) were then prepared through a simple approach at room temperature. The as prepared materials were characterized by various technologies, including EDX, FT-IR, XRD, TG analysis, XPS, zeta potentiometer, TEM, and AFM. The current response of PtPd-CP5@RGO modified glassy carbon electrode (GCE) to BPA oxidation was higher than that of Pt NPs-, Pd NPs-, or CP5-modified GCE. An electrochemical sensor based on PtPd-CP5@RGO-modified GCE was utilized to determine BPA through differential pulse voltammetry. The sensor yielded the wider linear ranges of 0.01-50 mu M and 50-1000 mu M, respectively, with a lower limit of detection of 3.3 nM (S/N = 3) for BPA determination. The constructed sensor showed some advantages, such as satisfactory reproducibility, good stability, and excellent selectivity, which was applied to determine BPA concentration in real samples. BPA and CP5 likely formed a stable complex mainly via supramolecular interactions, such as electrostatic and hydrophobic interaction.