Development of gold-doped carbon foams as a sensitive electrochemical sensor for simultaneous determination of Pb (II) and Cu (II)

Xiong, Wei; Lan, Zhou; Liu, Shantang

doi:10.1016/j.cej.2015.09.013

Cited by 97 publications

(23 citation statements)

References 29 publications

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“…More specifically, the incorporation of nanoparticles (NPs) on the sensor surface has shown good results for the determination of As [14,15,16], Cr [17], Cu [10,18,19], Pb [10,18,19,20], Cd [5], and Hg [7,21,22]. Most of these works used a screen-printed electrode (SPE) modified with different types of NPs (Pt-NPs, Ag-NPs or Au-NPs) as electrocatalysts.…”

Section: Introductionmentioning

confidence: 99%

Strategies for Surface Modification with Ag-Shaped Nanoparticles: Electrocatalytic Enhancement of Screen-Printed Electrodes for the Detection of Heavy Metals

Torres-Rivero

Torralba-Cadena

Espriu-Gascon

et al. 2019

Sensors

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Screen-printed carbon nanofiber electrodes (SPCNFEs) represent an alternative with great acceptance due to their results, as well as their low impact on the environment. In order to improve their performance, in the present work they were modified with silver nanoparticles (Ag-NPs) and electrochemically characterized by using anodic stripping voltammetry. From the Ag-NP synthesis, silver seeds (Ag-NS) and silver nanoprisms (Ag-NPr) were obtained. The Ag-NP formation was confirmed by micrographs, where Ag-NPs with diameters of 12.20 ± 0.04 nm for Ag-NS and 20.40 ± 0.09 nm for Ag-NPr were observed. The electrodes were modified by using three different deposition methods—drop-casting, spin-coating, and in situ approaches—that offer different nanoparticle distribution and electrode modification times. It was observed that the last methodology showed a low amount of Ag-NS deposited on the electrode surface and deep alteration of this surface. Those facts suggest that the in situ synthesis methodology was not appropriate for the determination of heavy metals, and it was discarded. The incorporation of the nanoparticles by spin-coating and drop-casting strategies showed different spatial distribution on the electrode surface, as proved by scanning electron microscopy. The electrodes modified by these strategies were evaluated for the cadmium(II) and lead(II) detection using differential pulse anodic stripping voltammetry, obtaining detection limit values of 2.1 and 2.8 µg·L−1, respectively. The overall results showed that the incorporation route does not directly change the electrocatalytic effect of the nanoparticles, but the shape of these nanoparticles (spherical for seeds and triangular for prisms) has preferential electrocatalytic enhancement over Cd(II) or Pb(II).

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Section: Introductionmentioning

confidence: 99%

Strategies for Surface Modification with Ag-Shaped Nanoparticles: Electrocatalytic Enhancement of Screen-Printed Electrodes for the Detection of Heavy Metals

Torres-Rivero

Torralba-Cadena

Espriu-Gascon

et al. 2019

Sensors

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“…In spite of high sensitivity and accuracy of these methods, they are not appropriate for on-site measurements on account of cumbersome and sophisticated apparatus, complicated pretreatment procedures and tedious analysis time. By contrast, electrochemical technique has received increasing attention in the analytical field due to its fascinating features such as simple handling, rapid response, low limit of detection (LOD), superior sensitivity and favourable selectivity [22][23][24][25][26][27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Hierarchical MgFe-layered double hydroxide microsphere/graphene composite for simultaneous electrochemical determination of trace Pb(II) and Cd(II)

Wang

Xie

et al. 2018

Chemical Engineering Journal

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Heavy metal contamination has been demonstrated to possess the severe threats toward the whole ecosystems and public security even at trace levels. Therefore, it is essential to exploit an ultrasensitive technique to determine the levels of heavy metal ions. In this work, hierarchical MgFe-layered double hydroxide (MgFe-LDH) microspheres have been successfully immobilized on the graphene nanosheets surface via a facile one-step hydrothermal route. Benefiting from the synergistic effects associated with high specific surface area, strong affinity of hierarchical MgFe-LDH architecture toward heavy metal ions, good electrical conductivity and effective electron transfer efficiency of graphene, the resulting composite (denoted as MgFe-LDH/graphene) is explored as an electrochemical sensor for simultaneous

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“…Recently, among the methods for detecting transition metal ions, such as atomic absorption spectroscopy, electrochemical analysis, optical probes and inductively coupled plasma mass spectrometry, [12][13][14][15][16] fluorescent probes, especially colorimetric fluorescent probes, have attracted considerable interest due to their simple sample preparation, high selectivity and sensitivity, easy synthesis, and quick response. [17][18][19] Because of the great influence of copper ions on organisms and the environment, much effort has been devoted to developing sensitive and selective colorimetric fluorescent probes for the detection of copper ions.…”

Section: Introductionmentioning

confidence: 99%

A Colorimetric and Fluorescent Probe for the Detection of Cu2+ in a Complete Aqueous Solution

Wang

Liu

et al. 2018

ANAL. SCI.

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The fluorescent probe has become an important method for the detection of heavy metal ions. In the present work, a new and simple fluorescent probe, Cu-P, for detecting copper ion (Cu) was designed and synthesized. The probe has shown high sensitivity and selectivity toward Cu. The detection limit was 13 nM (based on the 3σ/slope). A significant color change from yellow to pink was observed; thus, the probe Cu-P could serve as a "naked-eye" indicator for Cu. Furthermore, the proposed probe was used to detect Cu in real water and soil extract samples, with the result being satisfactory. Therefore, our proposed probe would provide a promising method for the detection of Cu in the environment.

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Development of gold-doped carbon foams as a sensitive electrochemical sensor for simultaneous determination of Pb (II) and Cu (II)

Cited by 97 publications

References 29 publications

Strategies for Surface Modification with Ag-Shaped Nanoparticles: Electrocatalytic Enhancement of Screen-Printed Electrodes for the Detection of Heavy Metals

Strategies for Surface Modification with Ag-Shaped Nanoparticles: Electrocatalytic Enhancement of Screen-Printed Electrodes for the Detection of Heavy Metals

Hierarchical MgFe-layered double hydroxide microsphere/graphene composite for simultaneous electrochemical determination of trace Pb(II) and Cd(II)

A Colorimetric and Fluorescent Probe for the Detection of Cu2+ in a Complete Aqueous Solution

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