Sensitive detection of Pb(II) at gold nanoparticle/polyaniline/graphene modified electrode using differential pulse anodic stripping voltammetry

被引:48
作者
Dong, YongPing [1 ]
Zhou, Ying [1 ]
Ding, Yong [1 ]
Chu, XiangFeng [1 ]
Wang, ChengMing [2 ]
机构
[1] Anhui Univ Technol, Sch Chem & Chem Engn, Maanshan 243002, Peoples R China
[2] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China
基金
中国博士后科学基金; 中国国家自然科学基金;
关键词
WALLED CARBON NANOTUBES; FILM ELECTRODE; HYBRID SYSTEMS; GRAPHENE OXIDE; THIN-FILMS; METAL-IONS; POLYANILINE; COMPOSITES; NANOPARTICLES; POLYPYRROLE;
D O I
10.1039/c4ay01908c
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
In this work, a gold nanoparticle/polyaniline/graphene ternary nanocomposite modified glassy carbon electrode (GNP/PANI/GR/GCE) was prepared and characterized by scanning electron microscopy, spectroscopic techniques, and electrochemical techniques. It was found that the GNP/PANI/GR nanocomposite exhibited a good synergetic effect on the electrochemical signal from Pb2+, which is more efficient than that of electrodes modified with the individual materials. The modified electrode could be applied in the sensitive detection of Pb2+ by differential pulse anodic stripping voltammetry (DPASV). Several experimental parameters, such as the ratio of aniline/graphene, the amount of suspension modified on the electrode, the pH, the diameter of gold nanoparticles, the deposition time, and the potential of Pb2+ were optimized. Under the optimal conditions, a good linear relationship between the stripping peak currents and the concentration of Pb2+ was obtained in the range of 0.5 to 10 nM with a correlation coefficient of 0.9995 and a detection limit of 0.1 nM. The proposed method is applicable in the determination of trace Pb2+ in real water samples with a relative standard deviation less than 3.5% and recovery rates of similar to 99%.
引用
收藏
页码:9367 / 9374
页数:8
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