Mesoporous MgO nanosheets: 1,6-hexanediamin-assisted synthesis and their applications on electrochemical detection of toxic metal ions

Wu, Zhengcui; Xu, Chengrong; Chen, Hua-Mao; Wu, Yaqin; Li, Yuhang; Yin, Yulong; Gao, Feng

doi:10.1016/j.jpcs.2013.02.029

Cited by 32 publications

(20 citation statements)

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“…7,8,[55][56][57] However, the inuence of calcination temperature on the electrochemical performance of MgO is still rare. 7,8,[55][56][57] However, the inuence of calcination temperature on the electrochemical performance of MgO is still rare.…”

Section: Electrochemical Properties Of the Calcined Productsmentioning

confidence: 99%

“…These features have made MgO a promising candidate for applications in the elds including catalysis, 1-3 adsorption and separation, 4-6 chemical sensing, 7,8 and electrical 9 and optical 10 devices. These features have made MgO a promising candidate for applications in the elds including catalysis, 1-3 adsorption and separation, 4-6 chemical sensing, 7,8 and electrical 9 and optical 10 devices.…”

Section: Introductionmentioning

confidence: 99%

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Calcination temperature-dependent surface structure and physicochemical properties of magnesium oxide

et al. 2015

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Magnesium oxide (MgO), as an exceptionally important inorganic material, has been widely studied in view of its unique surface properties, but the correlation between its surface structure and physicochemical performance is still scarce. Here we report the evolution of the surface structure and physicochemical properties of trapezoid-like MgO microparticles with calcination temperature by transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), thermal gravimetric analysis (TGA) and X-ray diffraction (XRD) techniques. The results demonstrated that along with the surface change of MgO from a smooth appearance to the structure composed of nanoparticles, its corresponding crystal structure evolved from mesocrystal to polycrystal, then to pseudomorph, and finally to cubic single crystal with the increase of calcination temperature ranging from 400 C to 1000 C. It also illustrated that the electrochemical capability of MgO was highly dependent on its crystal structure, whereas its catalytic activity had a good correlation with its textural properties (e.g., surface area and porosity) although the reaction selectivity was related to the calcination temperature. This work highlights the vital role of calcination temperature in determining the surface structure and physicochemical properties of the inorganic material MgO, which in turn will tailor its overall performance in the final applications.

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Section: Electrochemical Properties Of the Calcined Productsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Calcination temperature-dependent surface structure and physicochemical properties of magnesium oxide

et al. 2015

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“…Magnesium oxide (MgO), as an exceptionally important inorganic material, has found wide application in many fields including catalysts, adsorption and separation, chemical sensing, electrical and optical devices, toxic waste remediation, and superconductor products, due to its unique surface basic property as well as nontoxic and environmentally friendly nature. Over the past decades, many protocols such as the sol–gel route, the precipitation method, the hydrothermal method, chemical vapour deposition, precursor decomposition, and so on have been developed to fabricate meso‐, micro‐ and nano‐structured MgO.…”

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confidence: 99%

Characterization of the surface properties of MgO using paper spray mass spectrometry

Zheng

Bai

Zhang

2016

Rapid Comm Mass Spectrometry

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RATIONALE: Significant advances have been made in the preparation of different morphologies of magnesium oxide (MgO), but the relationship between MgO morphology and its interactions with therapeutic drugs is rarely studied. Herein, we investigated the interactions between different morphologies of MgO and therapeutic drugs using paper spray mass spectrometry. METHODS: Different morphologies of MgO including trapezoidal, needle-like, flower-like and nest-like structures were prepared through a facile precipitation method. The as-obtained MgO particles were then coated onto the surface of filter paper via vacuum filtration strategy. The coated papers with different morphologies of MgO were used as the substrates for paper spray mass spectrometry to explore the interactions between different MgO and therapeutic drugs. RESULTS: Through investigating the interactions between different morphologies of MgO coated papers and therapeutic drugs, it demonstrated that, in contrast to the trapezoidal, needle-like and nest-like MgO coated papers, different drugs in dried blood spots (DBS) were more favourably eluted off from the paper coated with flower-like MgO due to its weaker surface basicity. Also, the signal intensities of different drugs during paper spray were highly dependent on their elution behaviours. CONCLUSIONS: Paper spray mass spectrometry (MS) provides an avenue to elaborate the surface properties of MgO with different structures. The surface basicity of MgO played a crucial role in determining the elution behaviours of therapeutic drugs in DBS, and a more favourable elution behaviour tended to result in a higher MS signal. Copyright © 2016 John Wiley & Sons, Ltd.Magnesium oxide (MgO), as an exceptionally important inorganic material, has found wide application in many fields including catalysts, [1][2][3][4][5][6] adsorption and separation, [7][8][9] chemical sensing, [10,11] electrical [12] and optical [13] devices, toxic waste remediation, [14] and superconductor products, [15] due to its unique surface basic property as well as nontoxic and environmentally friendly nature. Over the past decades, many protocols such as the sol-gel route, [16] the precipitation method, [9,17,18] the hydrothermal method, [19] chemical vapour deposition, [20] precursor decomposition, [21] and so on [22,23] have been developed to fabricate meso-, micro-and nanostructured MgO. The reported morphologies of MgO are mainly composed of spherical structure, [9] parallelogram, [18] nanowires, nanotubes or nanobelt, [24] nanoflower, [25] nanosheets, [26] cubes, [27] whiskers, [28] stacks of plates, [29] rectangular parallelepiped, [30] columnar structure, [31] and corraline. [32] In recent years, numerous studies have demonstrated that the change in the morphology of MgO can alter its surface properties, [1,2,[33][34][35] which was formerly considered constant. [21] For example, many reports have evidenced that the catalytic performance of MgO was closely related with its shape, illustrating an apparent morphologydependent phenomenon...

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“…As compared, the lowest response to Pb 2+ on commercial MgO is due to its low specific surface area (∼7.3 m 2 /g) as well as its poor conductivity (evidenced by EIS in Figure ). Besides, the high adsorption abilities toward metal ions of MgO synergistically reinforce the electrochemical responses on MgO/OMC.…”

Section: Resultsmentioning

confidence: 88%

“…MgO is mainly chosen as adsorbent for heavy metal ions because of its electrostatic attraction , which leads to a high adsorption and hence good electrochemical response for heavy metal detection. Consequently, some reports have verified the good properties of MgO; a flower‐like MgO nanoparticle‐modified glassy carbon electrode (GCE) showed excellent selectivity and low detection limit toward both Pb 2+ and Cd 2+ , and mesoporous MgO has been used for simultaneous and selective electrochemical determination of Hg 2+ , Cu 2+ , Pb 2+ and Cd 2+ . One drawback, however, with MgO is its poor conductivity which suppresses the electron transfer and thereby lowers the electrochemical activity on the MgO surface, suggesting that a great improvement might be achieved if the intrinsic characteristics could be compensated for .…”

Section: Introductionmentioning

confidence: 99%

In situ Magnesiothermal Synthesis of Mesoporous MgO/OMC Composite for Sensitive Detection of Lead Ions

Shen

Qin

et al. 2016

Electroanalysis

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Mesoporous materials have exceptional properties for application owing to their ability to absorb and interact with guest species. A novel MgO/OMC composite with mesoporous structure was successfully synthesized via in situ magnesiothermic reduction. The structure was confirmed by N2 sorption isotherms, X‐ray diffraction pattern (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). By using nafion and bismuth films as co‐modifiers, the MgO/OMC composite material shows high sensitivity of 0.113 μA ⋅ L μg−1 and lower background current for electrochemical determination of lead ion (Pb2+) by using anodic stripping voltammetry. The high specific surface area and good mass transfer on the proposed mesoporous material, as well as the outstanding adsorption abilities of MgO to metal ions and the excellent conductivity of the carbon skeleton contribute to the enhanced electrochemical response of Pb2+. As the stripping response of Bi/MgO/OMC‐Nafion/PGE is highly linear (R2=0.998) over a Pb2+ concentration range of 2 to 300 μg/L, it was successfully used to analyse Pb2+ in real tap‐water samples with good recoveries.

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Mesoporous MgO nanosheets: 1,6-hexanediamin-assisted synthesis and their applications on electrochemical detection of toxic metal ions

Cited by 32 publications

References 41 publications

Calcination temperature-dependent surface structure and physicochemical properties of magnesium oxide

Calcination temperature-dependent surface structure and physicochemical properties of magnesium oxide

Characterization of the surface properties of MgO using paper spray mass spectrometry

In situ Magnesiothermal Synthesis of Mesoporous MgO/OMC Composite for Sensitive Detection of Lead Ions

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