期刊
ELECTROCHIMICA ACTA
卷 222, 期 -, 页码 1371-1377出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2016.11.113
关键词
Three-dimensionally interconnected mesoporous graphene framework; Bismuth film; Differential pulse anodic stripping voltammetry; Cd( II); Pb( II)
资金
- 1000 Talent Program' (The Recruitment Program of Global Experts)
- National Basic Research Program of China (973 program) [2014CB845602]
- Shanghai International Science and Technology Cooperation Project [15520720100]
- National Natural Science Foundation of China [21473247, 21373052]
- 'Young Creative Sci-Tech Talents Cultivation Project of the Xinjiang Uyghur Autonomous Region [2013711012, 2013711016]
Recently, ordered mesoporous carbon has displayed attractive performance in electrochemical catalysis and sensing, benefiting from its rich and tunable pore texture. In this work, a novel electrochemical sensor based on a three-dimensionally interconnected mesoporous graphene framework (MGF) was developed for simultaneous determination of Cd(II) and Pb(II) in aqueous solution. Attributable to the abundant three-dimensional mesopores and good electrical conductivity of MGF, as well as the synergistic effect of Nafion and in-situ plated bismuth films, a highly sensitive determination of mixed metals at a Bi/MGF-Nafion/ GCE is achieved. The proposed sensor exhibits wide linear responses for Cd(II) and Pb(II), ranging from 2-70 mu g L (1) and 0.5-110 mu g L (1), respectively. The detection limits are about 0.5 and 0.1 mu g L (1) for Cd(II) and Pb(II), respectively, which are about 6 and 100 times lower than the drinking water standards set by the World Health Organization (WHO). Moreover, Bi/MGF-Nafion/ GCE has been applied for the detection of mixed metals in real water samples. The satisfying recoveries (87.5-109.2%) and relative standard deviations (RSD, 3.7-8.6%) make the proposed electrode a promising candidate for rapid and on-site monitoring of environmental metallic pollutants. (C) 2016 Elsevier Ltd. All rights reserved.
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