Electrochemical behavior of amaranth and its sensitive determination based on Pd-doped polyelectrolyte functionalized graphene modified electrode
Electrochemical behavior of amaranth and its sensitive determination based on Pd-doped polyelectrolyte functionalized graphene modified electrode
复制标题
基于Pd掺杂聚电解质功能化石墨烯修饰电极的苋菜电化学行为及其灵敏测定
DOI：
10.1016/j.talanta.2017.03.035
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发表时间：
2017-06-01
期刊：
影响因子：
6.1
通讯作者：
Ye, Baoxian
中科院分区：
文献类型：
--
作者：
Gao, Yudong;Wang, Lu;Ye, Baoxian
采用超声浴法制备了聚对苯乙烯磺酸钠（PSS）功能化石墨烯负载钯纳米粒子（Pd）复合材料。采用紫外维斯吸收光谱、X射线衍射和透射电镜对PSS-GR-Pd复合材料的形貌和结构进行了表征。结合PSS-GR和Pd纳米粒子的优点，构建了一种基于PSS-GR-Pd纳米复合材料的阿马兰斯红电化学传感器。研究了阿马兰斯红在0.1mol L-1磷酸盐缓冲溶液（PBS 2.0）中的电化学行为。在最佳条件下，I_（pa）与阿马兰斯红的浓度（1 × 10 ~（-7）× 9 × 10 ~（-6）mol·L ~（-1））呈线性关系。检测限为7 nM（S/N=3），灵敏度为5.85 μ A μ M-1。最后，将该系统用于标准加入法测定软饮料中的阿马兰斯红。
In this work, poly(sodium p-styrenesulfonate) (PSS)-functionalized graphene supported palladium nanoparticles (Pd) composites were fabricated with simple ultrasonic bath method. The morphology and structure of PSS-GR-Pd composites were characterized using UV vis absorption spectra, X-ray diffraction and Transmission Electron Microscopy. By combining the merits of the PSS-GR and Pd NPs, a new electrochemical sensor was erected to detect amaranth based on the PSS-GR-Pd nanocomposites. The electrochemical behavior of amaranth was investigated systematically in 0.1 mol L-1 phosphate buffer solution (PBS 2.0). At the optimum parameter, I-pa was found to be linearly dependent on the concentrations of amaranth (1x10(-7-)x9x10(-6) mol L-1). The detection limit was 7 nM (S/N=3) and sensitivity was 5.85 mu A mu M-1. Finally, this system was utilized for determining amaranth in soft drink using the standard addition method.