Electrochemical sensor using NH2-MIL-88(Fe)-rGO composite for trace Cd2+, Pb2+, and Cu2+ detection

Duan, Shuo; Huang, Yuming

doi:10.1016/j.jelechem.2017.11.051

Cited by 92 publications

(25 citation statements)

References 53 publications

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“…This revealed that (BiO) 2 CO 3 -rGO-Nafion nanocomposite has a dramatic affinity, as well as wonderful performance, toward the SWASV analysis of Cd(II) and Pb(II) because of the synergistic effect of rGO, (BiO) 2 CO 3 and Nafion, which could be attributed to three factors. First, the presence of rGO in the composite increased the conductivity and effective specific surface area, which was beneficial to the adsorption of the probe metal ions and the transfer of redox electrons [45,46]. Second, (BiO) 2 CO 3 efficiently helped the preconcentration of Pb(II) and Cd(II) because of the formation of multicomponent alloy with HMs, which made them reduce more easily with a higher current [25].…”

Section: Electrochemical Characteristics Of Different Modified Electrmentioning

confidence: 99%

Bismuth Subcarbonate Decorated Reduced Graphene Oxide Nanocomposite for the Sensitive Stripping Voltammetry Analysis of Pb(II) and Cd(II) in Water

Zhao

Sedki

et al. 2020

Sensors

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In this paper, bismuth subcarbonate (BiO)2CO3-reduced graphene oxide nanocomposite incorporated in Nafion matrix ((BiO)2CO3-rGO-Nafion) was synthesized and further applied, for the first time, in the sensitive detection of Pb(II) and Cd(II) by square-wave anodic stripping voltammetry (SWASV). The as-synthesized nanocomposites were characterized by energy-dispersive spectroscopy (EDS), Raman spectroscopy, scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS). (BiO)2CO3 composite plays a key role in the improvement of the detection sensitivity, which can form multicomponent alloy with cadmium and lead. Additionally, the unique structure of rGO can enlarge the surface area and provide abundant active sites. Moreover, Nafion incorporation in the nanocomposite can effectively increase the adhesion and mechanical strength of the film, and further improve the preconcetration ability due to the cation-exchange capacity of its abundant sulfonate groups. As expected, the (BiO)2CO3-rGO/Nafion nanocomposite-modified glassy carbon electrode ((BiO)2CO3-rGO-Nafion/GCE) achieved low detection limits of 0.24 μg/L for Pb(II) and 0.16 μg/L for Cd(II), in the linear range of 1.0–60 μg/L, and showed some excellent performance, such as high stability, good selectivity, and sensitivity. Finally, synthetic water samples were prepared and further used to verify the practicability of the (BiO)2CO3-rGO-Nafion/GCE with satisfactory results.

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Section: Electrochemical Characteristics Of Different Modified Electrmentioning

confidence: 99%

Bismuth Subcarbonate Decorated Reduced Graphene Oxide Nanocomposite for the Sensitive Stripping Voltammetry Analysis of Pb(II) and Cd(II) in Water

Zhao

Sedki

et al. 2020

Sensors

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“…As the pH value further increases, the peak current gradually decreases. This may be due to the fact that the amino and hydroxyl groups of the UiO-66-NH 2 /ZnO composite are easy to be protonated at a low pH value, 53 which is not conducive to the adsorption of Cu( ii ) onto the modified material. Conversely, when the pH value is greater than 5.0, the decrease in peak current may be related to the hydrolysis of Cu( ii ) to form metal hydroxides.…”

Section: Resultsmentioning

confidence: 99%

An electrochemical sensor based on a MOF/ZnO composite for the highly sensitive detection of Cu(ii) in river water samples

Jiang

et al. 2022

RSC Adv.

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“…The research proves that the ÀNO 2 group of metronidazole can be directly reduced to ÀNHOH at the MIL- [54] AuNPs/CNFs 0.1-1.0 0.1-1.0 100 100 [55] Ti/TiO 2 0.6-13.2 0.6-13.2 160 140 [56] VMSF/ITO 1.0-20.0 0.025-40 230 2.6 [57] MnFe 2 O 4 @Cys/GCE 0.2-1.1 0.2-1.1 221 60.7 [58] [Ru(bpy) 3 ] 2 + -GO modified Au electrode 0.02-0.9 0.05-1.5 2.8 1.4 [59] NH 2 -MIL-88(Fe)-rGO/GCE 0.005-0.3 0.01-0.3 4.9 10 [60] rGO@AuNPs modified electrode 1.0-12.0 1.0-12.0 31.81 12.69 [61] MIL-100(Cr)/ GCE 1.0-10.0 1.0-10.0 44 48 [62] MIL-101(Cr) /rGO-20/GCE 0.05-6.0 0.05-6.0 5.2 3.0 This work 101(Cr)/rGO-20/GCE, which belongs to a four-electron and fourproton process. The addition of rGO not only increases the pore size but also enhances the conductivity of composite compared to single MOF, which will be conducive to promoting mass transmission and accelerating electron transfer.…”

Section: Discussionmentioning

confidence: 99%

High Performance Electrocatalyst Based on MIL‐101(Cr)/Reduced Graphene Oxide Composite: Facile Synthesis and Electrochemical Detections

Yin

et al. 2018

ChemElectroChem

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In this work, a Cr-based MOF (MIL-101(Cr))/reduced grapheme oxide(rGO) electrocatalyst was prepared through a one-pot hydrothermal method. The obtained composite was characterized via scanning electron microscopy, transmission electron microscopy, X-ray diffraction and other standard techniques. Electrochemical methods were adopted to study the electrocatalytic ability of the composite. The results imply that, compared to the single components, it exhibits higher electrocatalytic activity for the reduction of metronidazole and stripping of Cd 2 + and Pb 2 + . Optimizing the ratio of MIL-101(Cr) and rGO, an electrochemical sensor was prepared using MIL-101 (Cr)/rGO-20 and used for detection of metronidazole, Cd 2 + and Pb 2 + , respectively. The linear range for metronidazole can be divided in two parts, i. e. from 0.5 to 200 mM and from 200 to 900 mM. The limit of detection is 0.24 mM (S/N = 3, n = 10). Likewise, it also exhibits a wide linear range from 0.05 to 6.0 mM for the detection of Cd 2 + and Pb 2 + . The corresponding detection limits are found to be 5.2 nM and 3.0 nM (S/N = 3, n = 10), respectively. The proposed sensor also possesses superb selectivity, reproducibility, stability and can be applied to detect real samples with desired recovery rates. In addition, the possible reduction mechanism of metronidazole and adsorption mechanism of Cd 2 + and Pb 2 + were further discussed simply in this work.[a] J.

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Electrochemical sensor using NH2-MIL-88(Fe)-rGO composite for trace Cd2+, Pb2+, and Cu2+ detection

Cited by 92 publications

References 53 publications

Bismuth Subcarbonate Decorated Reduced Graphene Oxide Nanocomposite for the Sensitive Stripping Voltammetry Analysis of Pb(II) and Cd(II) in Water

Bismuth Subcarbonate Decorated Reduced Graphene Oxide Nanocomposite for the Sensitive Stripping Voltammetry Analysis of Pb(II) and Cd(II) in Water

An electrochemical sensor based on a MOF/ZnO composite for the highly sensitive detection of Cu(ii) in river water samples

High Performance Electrocatalyst Based on MIL‐101(Cr)/Reduced Graphene Oxide Composite: Facile Synthesis and Electrochemical Detections

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