A novel design of engineered multi-walled carbon nanotubes material and its improved performance in simultaneous detection of Cd(II) and Pb(II) by square wave anodic stripping voltammetry

Li, Xueying; Zhou, Haihui; Fu, Chaopeng; Wang, Fei; Ding, Yujie J.; Kuang, Yafei

doi:10.1016/j.snb.2016.05.149

Cited by 83 publications

(30 citation statements)

References 38 publications

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“…It can been seen from Figure a, as the concentration of Bi(III) increased from 100 to 300 μg ⋅ L −1 at −1.0 V for 180 s in 0.1 M HAc‐NaAc (pH 5.0), the peak currents also increase due to the formation of the Cd‐Bi alloy . When the concentration of Bi(III) is raised above 300 μg ⋅ L −1 , the stripping currents of Cd(II) decrease, which is likely due to a thick bismuth coating hindering the mass transfer of Cd(II) during the stripping process . Therefore, the Bi(III) concentration of 300 μg ⋅ L −1 was selected for optimal determination of Cd(II).…”

Section: Resultsmentioning

confidence: 97%

N‐Doped Hollow Porous Carbon Spheres/Bismuth Hybrid Film Modified Electrodes for Sensitive Voltammetric Determination of Trace Cadmium

et al. 2018

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In this work, N‐doped hollow porous carbon spheres (N‐HPCSs) were synthesized by silicon dioxide template‐assisted polybenzoxazine (PB) coating strategy. The prepared N‐HPCSs have a smooth hollow ball structure surrounded by a well‐defined porous shell. Combining with in‐situ plating of Bi film, the N‐HPCSs were further fabricated a sensitive electrochemical platform for determination trace levels of Cd(II) by differential pulse anodic stripping voltammetry (DPASV). Under the optimized conditions, the Bi‐N‐HPCSs based sensor displays a linear response to Cd(II) over the range of 0.5 μg L−1 to 150 μg L−1. Meanwhile, the limit of detection (LOD, S/N=3) is estimated to be around 0.16 μg L−1 for Cd(II), which is 31 times lower than the safety values set by United States Environmental Protection Agency (EPA) for the drinking water. Moreover, the proposed method was successfully applied to detection of Cd(II) in tap water and lake water, and the analytical results of the presented method are agreed well with inductively coupled plasma‐mass spectrometry (ICP‐MS) data. Due to the excellent analytical performance, the fabricated electrode is promised for future development in monitoring of cadmium pollution in the environment.

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Section: Resultsmentioning

confidence: 97%

N‐Doped Hollow Porous Carbon Spheres/Bismuth Hybrid Film Modified Electrodes for Sensitive Voltammetric Determination of Trace Cadmium

et al. 2018

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“…Figure 3 b shows the influence of deposition potential, which ranged from −0.7 to −1.2 V in NaAc-HAc solution. The peak currents increased as the deposition potential shifted from −0.7 to −1.0 V, and reached the maximum at −1.0 V. As the potential rose beyond −1.0 V, the response decreased, which was most likely caused by the interference of hydrogen evolution [ 13 , 42 ]. Therefore, −1.0 V was selected in the subsequent experiment.…”

Section: Resultsmentioning

confidence: 99%

“…Early mercury-based electrodes were frequently carried out due to the unique ability of mercury to preconcentrate heavy metals [ 9 ]. However, when considering its serious toxicity and difficulty in handling, great efforts have been devoted to search for excellent sensing materials to replace this electrode, such as carbon-based materials [ 13 , 14 , 15 ], mesoporous silica [ 16 ], metal oxides (F 3 O 4 , Cu 2 O, Co 3 O 4 , etc.) [ 1 , 17 , 18 ], and novel metal nanoparticle modifications [ 2 , 19 , 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

Regulation of the Electroanalytical Performance of Ultrathin Titanium Dioxide Nanosheets toward Lead Ions by Non-Metal Doping

Zhang

Liao

et al. 2017

Nanomaterials

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Three non-metallic elements, sulfur, fluorine, and iodine, were used to dope the ultrathin two-dimensional TiO2 nanosheets, which would regulate their electroanalytical properties toward heavy metal ions. Among these doped materials, fluorine-doped TiO2 nanosheets shows the highest electrochemical sensitivity and a superior detection limit toward Pb(II) when the doping concentration is 10%. When compared with the bare TiO2 nanosheets, the sensitivity increased by 102%, and the detection limit decreased by 36.4%. Through combining further electrochemical experiments and density-functional theory calculations, the enhanced electrochemical performance stemming from element doping was then investigated in detail. The theoretical calculation demonstrated that fluorine doping could greatly increase the adsorption energy of Pb(II) on the TiO2 nanosheets and enhance their loading capacity. Both cyclic voltammetric and electrical impedance spectroscopy analysis indicated the enhanced electron transfer rate on the electrode modified by fluorine-doped TiO2 nanosheets. Further measurement on the desorption performance showed the better stripping response of Pb(II) on the electrode with TiO2 nanosheets after fluorine doping, which suggests that fluorine doping is beneficial for Pb(II) diffuse onto the electrode surface for the reduction and stripping reaction. Therefore, the element doping of two-dimensional TiO2 nanosheets provides a facile method to extend the electronic materials toward detection of heavy metal ions in the environment.

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“…In the practical electrochemical tests, the powder is required to be mixed with binders and then coated on the conductive substrates. 25,26,[32][33][34] Mostly, the binders, which are usually insulators, may decrease the electrical conductivity of electrodes to have a negative effect on the performance. 35 In addition, there may be also new penalties arising from supplementary interfaces between the current collector and active material, as well as active materials themselves.…”

Section: Introductionmentioning

confidence: 99%

Flower-like Bismuth Metal-Organic Frameworks Grown on Carbon Paper as a Free-Standing Electrode for Efficient Electrochemical Sensing of Cd2+ and Pb2+ in Water

Xiang¹,

Pan²,

Li³

2018

Eng. Sci.

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In this work, a free-standing electrode composed of bismuth terephthalate metal-organic frameworks grown on carbon paper (BiMOF/CP) was successfully prepared by a facile one-pot hydrothermal method. Materials characterization revealed the formation of flower-like ultrathin nanosheets of BiMOF fully covering on the microfibers of carbon paper. The BiMOF/CP was applied in the electrochemical detection of Cd 2+ and Pb 2+ in water. The BiMOF/CP electrode exhibited superior sensing performance with a linear detection of Cd 2+ and Pb 2+ with low detection limits of 1.5 μg/L for Cd 2+ and 2.7 μg/L for Pb 2+ , respectively. The significantly enhanced sensing performance compared to bare carbon paper is attributed to the 3D hierarchical architecture of BiMOF and increased number of exposed surface sites, facilitating the adsorption of metals ions and electron transfer. The prepared novel materials will contribute to the development of cost-effective electrochemical sensors for heavy metal detection. Fig. 1 XRD spectrum of pure CP, BiMOF and BiMOF/CP. 78 | Eng. Sci., 2018, 3, 77-83 © Engineered Science Publisher LLC 2018Fig. 2 SEM image of pure CP (a) and BiMOF/CP (b-d).Fig. 3 XPS survey spectrum (a), Bi 4f (b) O1s (c), and C1s (d) of BiMOF/CP. Engineered Science Research PaperEng. Sci., 2018, 3, 77-83 | 79

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A novel design of engineered multi-walled carbon nanotubes material and its improved performance in simultaneous detection of Cd(II) and Pb(II) by square wave anodic stripping voltammetry

Cited by 83 publications

References 38 publications

N‐Doped Hollow Porous Carbon Spheres/Bismuth Hybrid Film Modified Electrodes for Sensitive Voltammetric Determination of Trace Cadmium

N‐Doped Hollow Porous Carbon Spheres/Bismuth Hybrid Film Modified Electrodes for Sensitive Voltammetric Determination of Trace Cadmium

Regulation of the Electroanalytical Performance of Ultrathin Titanium Dioxide Nanosheets toward Lead Ions by Non-Metal Doping

Flower-like Bismuth Metal-Organic Frameworks Grown on Carbon Paper as a Free-Standing Electrode for Efficient Electrochemical Sensing of Cd2+ and Pb2+ in Water

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