A sensitive mercury (II) sensor based on CuO nanoshuttles/poly(thionine) modified glassy carbon electrode

Yin, Zhaojing; Wu, Jiajia; Yang, Zhousheng

doi:10.1007/s00604-010-0359-4

Cited by 39 publications

(11 citation statements)

References 27 publications

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“…The limit of detection (LOD) was estimated to be 0.78 nM based on a signal-to-noise ratio of 3 (S/N=3), which is much lower than the maximum level of Hg(II) at 5 nM permitted by the WHO. Comparisons with other voltammetric methods [7,12,15,35] are shown in Table 1 for the determination of Hg(II). As can be seen from the table, as a new sensing strategy, the single voltammetry based on specific binding of MTU and Hg(II) but without electro-deposition process is an ideal candidate for sensitive and rapid detection of Hg(II).…”

Section: Methods Linearity and Detection Limitmentioning

confidence: 99%

“…Various available methods for Hg(II) include atomic absorption/emission spectrometry [4,5], inductively coupled plasma mass spectrometry [6], electrochemistry [7], spectrometry [8][9][10], chromatography [11], etc. Compared with the above other ones, electrochemical methods simultaneously possess many advantages such as convenient and simple operation, rapid completion, low consumption, high sensitivity and selectivity, as well as possible application in field tests and on-site monitoring [12,13].…”

Section: Introductionmentioning

confidence: 99%

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Highly sensitive and selective voltammetric detection of mercury(II) using an ITO electrode modified with 5-methyl-2-thiouracil, graphene oxide and gold nanoparticles

Zhou

Chen

et al. 2013

Microchim Acta

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We have developed an electrochemical sensor for highly selective and sensitive determination of Hg(II). It is based on the specific binding of 5-methyl-2-thiouracil (MTU) and Hg(II) to the surface of an indium tin oxide (ITO) electrode modified with a composite made from graphene oxide (GO) and gold nanoparticles (AuNPs). This leads to a largely enhanced differential pulse voltammetric response for Hg(II). Following optimization of the method, a good linear relationship (R=0.9920) is found between peak current and the concentration of Hg(II) in the 5.0-110.0 nM range. The limit of detection (LOD) is 0.78 nM at a signal-to-noise ratio of 3. A study on the interference by several metal ions revealed no interferences. The feasibility of this method was demonstrated by the analyses of real water samples. The LODs are 6.9, 1.0 and 1.9 nM for tap water, bottled water and lake water samples, respectively, and recoveries for the water samples spiked with 8.0, 50.0 and 100.0 nM were 83.9-96.8 %, with relative standard deviations ranging from 3.3 % to 5.2 %.

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Section: Methods Linearity and Detection Limitmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Highly sensitive and selective voltammetric detection of mercury(II) using an ITO electrode modified with 5-methyl-2-thiouracil, graphene oxide and gold nanoparticles

Zhou

Chen

et al. 2013

Microchim Acta

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“…However, due to its toxicity, numerous attempts to develop various mercury-free solid electrodes had been undertaken. Recently, considerable work has proved the fact that modification of electrodes with nanoparticles has been considered as an effective strategy to enhance the detection limit of heavy metal ions [26][27][28]. Therefore, all kinds of mercury free solid electrodes or chemically modified solid electrodes (CMEs) have been reported for the determination of metal ions based on the inducing of anion ions [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Iodide-induced adsorption of lead(II) ion on a glassy carbon electrode modified with ferroferric oxide nanoparticles

Yang

Dai

2012

Microchim Acta

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Spherical Fe 3 O 4 nanoparticles (NPs) were prepared by hydrothermal synthesis and characterized by scanning electron microscopy and X-ray diffraction. A glassy carbon electrode was modified with such NPs to result in a sensor for Pb(II) that is based on the strong inducing adsorption ability of iodide. The electrode gives a pair of well-defined redox peaks for Pb(II) in pH 5.0 buffer containing 10 mM concentrations of potassium iodide, with anodic and cathodic peak potentials at −487 mV and −622 mV (vs. Ag/AgCl), respectively. The amperometric response to Pb(II) is linear in the range from 0.10 to 44 nM, and the detection limit is 40 pM at an SNR of 3. The sensor exhibits high selectivity and reproducibility.

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“…Platinum electrode is also applicable to the determination of mercury [17]. Recently, the sensitive mercury (II) sensor based on CuO nanoshuttles/poly (thionine) modified glassy carbon electrode has been reported [1].…”

Section: Introductionmentioning

confidence: 99%

“…etc.) become the ones of the most toxic species of superficial and underground water [1]. Mercury is a highly toxic persistent bioaccumulative pollutant that affects the nervous system.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of folding flake-like CuO sub-microstructure and its application on mercury (II) sensor

Jiang

Chen

et al. 2011

J Mater Sci: Mater Electron

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Folding flake-like CuO sub-microstructure was successfully prepared on a large scale using a facile 1, 6-hexanediamin assisted low-temperature solution approach. The growth mechanism of the sample was discussed based on the time-resolved experiments. The experimental results demonstrated that the microstructures of CuO strongly depended on the concentration of the 1, 6-hexanediamin. The as-prepared CuO sub-microstructures were dispersed in Chitosan solution to fabricate composite film on glass carbon electrode. The electrochemical study has shown that the folding flake-like CuO sub-microstructure exhibits highest catalytic effect on Hg 2? than other CuO sub-microstructures. The amperometric response exhibited that the folding flakelike CuO sub-microstructure modified glassy carbon electrode has a good response for Hg 2? with a linear range of 1-200 lM in pH 6.0 phosphate buffered solutions.

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A sensitive mercury (II) sensor based on CuO nanoshuttles/poly(thionine) modified glassy carbon electrode

Cited by 39 publications

References 27 publications

Highly sensitive and selective voltammetric detection of mercury(II) using an ITO electrode modified with 5-methyl-2-thiouracil, graphene oxide and gold nanoparticles

Highly sensitive and selective voltammetric detection of mercury(II) using an ITO electrode modified with 5-methyl-2-thiouracil, graphene oxide and gold nanoparticles

Iodide-induced adsorption of lead(II) ion on a glassy carbon electrode modified with ferroferric oxide nanoparticles

Synthesis of folding flake-like CuO sub-microstructure and its application on mercury (II) sensor

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