Facile synthesis of porous bimetallic alloyed PdAg nanoflowers supported on reduced graphene oxide for simultaneous detection of ascorbic acid, dopamine, and uric acid
Facile synthesis of porous bimetallic alloyed PdAg nanoflowers supported on reduced graphene oxide for simultaneous detection of ascorbic acid, dopamine, and uric acid
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轻松合成还原氧化石墨烯负载的多孔双金属合金 PdAg 纳米花，用于同时检测抗坏血酸、多巴胺和尿酸
DOI：
10.1039/c4an02200a
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发表时间：
2015-01-01
期刊：
影响因子：
4.2
通讯作者：
Feng, Jiu-Ju
中科院分区：
文献类型：
--
作者：
Chen, Li-Xian;Zheng, Jie-Ning;Feng, Jiu-Ju
以十六烷基三甲基溴化铵为结构导向剂，采用简便易行的原位还原法制备了氧化石墨烯负载型双金属钯银(PdAg)纳米微粒。与PdAg/GCE、rGO/GCE、商品化Pd/C/GCE和裸GCE相比，所制备的纳米复合修饰玻碳电极对抗坏血酸(AA)、多巴胺(DA)和尿酸(UA)的氧化具有更强的催化电流和更大的峰电位间隔。该传感器对AA、DA和UA的选择性检测具有良好的抗干扰性，浓度范围分别为1.0µM~2.1mM、0.40~96.0µM和1.0~150.0µM，检测下限分别为0.057、0.048和0.081 mU M(S/N=3)。对于AA、DA和UA的同时检测，分别在1.0µM~4.1mM、0.05µM~112.0µM和3.0µM~186.0µM范围内呈良好的线性关系，检出限分别为0.185、0.017和0.654µM(S/N=3)。
Porous bimetallic alloyed palladium silver (PdAg) nanoflowers supported on reduced graphene oxide (PdAg NFs/rGO) were prepared via a facile and simple in situ reduction process, with the assistance of cetyltrimethylammonium bromide as a structure directing agent. The as-prepared nanocomposite modified glassy carbon electrode (PdAg NFs/rGO/GCE) showed enhanced catalytic currents and enlarged peak potential separations for the oxidation of ascorbic acid (AA), dopamine (DA), and uric acid (UA) as compared to those of PdAg/GCE, rGO/GCE, commercial Pd/C/GCE, and bare GCE. The as-developed sensor can selectively detect AA, DA, and UA with a good anti-interference ability, wide concentration ranges of 1.0 mu M-2.1 mM, 0.4-96.0 mu M, and 1.0-150.0 mu M, respectively, together with low detection limits of 0.057, 0.048, and 0.081 mu M (S/N = 3), respectively. For simultaneous detection of AA, DA, and UA, the linear current-concentration responses were observed from 1.0 mu M-4.1 mM, 0.05-112.0 mu M, and 3.0-186.0 mu M, with the detection limits of 0.185, 0.017, and 0.654 mu M (S/N = 3), respectively.