Controlled synthesis and structural characterization of polycrystalline GaSe

Abdullah, M.M.; Bhagavannarayana, G.; Wahab, M. A.

doi:10.1007/s10853-010-4496-2

Cited by 17 publications

(2 citation statements)

References 9 publications

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“…The general aspect of the XRD patterns, in particular, the presence of intense and sharp peaks and the absence of diffraction halo, indicate the presence of crystalline phase only and the absence of amorphous or crystalline-amorphous phase formation. 28 The obtained values of d-spacing of α-Fe 2 O 3 and CdSe are in good agreement with the values reported in the corresponding JCPDS file number 33-0664 and 77-2307, respectively. This confirms the rhombohedral structure of the α-Fe 2 O 3 phase and the hexagonal structure of CdSe nanostructures.…”

Section: Resultssupporting

confidence: 87%

Sensitive Detection of Aqueous Methanol by Electrochemical Route Using Mesoporous α-Fe₂O₃ Doped CdSe Nanostructures Modified Glassy Carbon Electrode

Abdullah

Faisal

Ahmed

et al. 2021

J. Electrochem. Soc.

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The proper coupling of different semiconductor nanostructures is a promising strategy to enhance the electrocatalytic activity for better performance of chemical sensor-based electrodes. Herein, we demonstrate the successful combination of mesoporous iron oxide (α-Fe2O3) doped cadmium selenide (CdSe) semiconducting nanocomposite for the sensitive detection of liquid methanol by the electrochemical technique. The active nanocomposite was synthesized by a facile modified sol-gel method in the presence of Pluronic F127 as a structure-directing agent, followed by a simple sono-chemical procedure. The structural, elemental, and morphological features of the as-synthesized α-Fe2O3/CdSe nanocomposite were fully characterized using X-ray diffraction (XRD), high-resolution transmission electron microscopy (HR-TEM), X-ray photoelectron spectroscopy (XPS), Fourier transforms infrared (FTIR), and Raman spectroscopy, which confirmed the purity, crystallinity and nanoscale dimension of synthesized materials. Compared to bare glassy carbon electrode (GCE) or CdSe modified GCE, the newly developed nanocomposite modified GCE with structure (α-Fe2O3−CdSe/Nafion/GCE) was found to be superior in methanol sensing. Outstanding sensor sensitivity of 0.2744 μAmM−1 cm−2, low limit of detection (LOD) at (S/N = 3) = 0.041 ± 0.005 mM and a wide dynamic range from 0.2 up to 800 mM have been obtained. The current electrode system exhibited also good operational stability, reproducibility, and repeatability during methanol sensing. The current research findings indicate the possible potential application of current nanocomposite as an efficient electrochemical sensor for other target analytes.

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Section: Resultssupporting

confidence: 87%

Sensitive Detection of Aqueous Methanol by Electrochemical Route Using Mesoporous α-Fe₂O₃ Doped CdSe Nanostructures Modified Glassy Carbon Electrode

Abdullah

Faisal

Ahmed

et al. 2021

J. Electrochem. Soc.

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“…using Proszki software is a = b = 4.963 Å & c = 13.554 Å whereas the reported 7 value of lattice constant is a = b = 4.953 Å & c = 13.578 Å. The calculated and reported values of lattice constants are in well agreement.This clearly shows that the growth of Cr 2 O 3 nanostructures by facile hydrothermal route does affect the morphology to a certain extent but not the crystal structure 18. Comparison of the two crystallographic data shows slight increase in "a" and "b" but slight decrease in "c" in our results.…”

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confidence: 49%

Structural and optical characterization of Cr2O3 nanostructures: Evaluation of its dielectric properties

Abdullah¹,

Rajab²,

Al-Abbas³

2014

AIP Advances

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199

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Articles you may be interested inThe Cr-substitution concentration dependence of the structural, electric and magnetic behaviors for Aurivillius Bi5Ti3FeO15 multiferroic ceramics J. Appl. Phys. 114, 234101 (2013); 10.1063/1.4849055Conversion of CH4/CO2 to syngas over Ni-Co/Al2O3-ZrO2 nanocatalyst synthesized via plasma assisted coimpregnation method: Surface properties and catalytic performance Synthesis of TiO 2 nanoparticles by hydrolysis and peptization of titanium isopropoxide solution AIP Conf.The structural, optical and dielectric properties of as-grown Cr 2 O 3 nanostructures are demonstrated in this paper. Powder X-ray diffractometry analysis confirmed the rhombohedral structure of the material with lattice parameter, a = b = 4.953 Å; c = 13.578 Å, and average crystallize size (62.40 ± 21.3) nm. FE-SEM image illustrated the mixture of different shapes (disk, particle and rod) of as-grown nanostructures whereas; EDS spectrum confirmed the elemental purity of the material. FTIR spectroscopy, revealed the characteristic peaks of Cr-O bond stretching vibrations. Energy band gap (3.2 eV) of the nanostructures has been determined using the results of UV-VIS-NIR spectrophotometer. The dielectric properties of the material were checked in the wide frequency region (100Hz-30 MHz). In the low frequency region, the matrix of the dielectric behaves like source as well as sink of electrical energy within the relaxation time. Low value of dielectric loss exhibits that the materials posses good optical quality with lesser defects. The ac conductivity of the material in the high frequency region was found according to frequency power law. The physical-mechanism and the theoretical-interpretation of dielectric-properties of Cr 2 O 3 nanostructures attest the potential candidature of the material as an efficient dielectric medium. C 2014 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.

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Sintering Behavior and Microwave Dielectric Properties of Low-Permittivity SrMgSi2O6 Ceramic

Zhou

et al. 2020

Journal of Elec Materi

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Controlled synthesis and structural characterization of polycrystalline GaSe

Cited by 17 publications

References 9 publications

Sensitive Detection of Aqueous Methanol by Electrochemical Route Using Mesoporous α-Fe₂O₃ Doped CdSe Nanostructures Modified Glassy Carbon Electrode

Sensitive Detection of Aqueous Methanol by Electrochemical Route Using Mesoporous α-Fe₂O₃ Doped CdSe Nanostructures Modified Glassy Carbon Electrode

Structural and optical characterization of Cr2O3 nanostructures: Evaluation of its dielectric properties

Sintering Behavior and Microwave Dielectric Properties of Low-Permittivity SrMgSi2O6 Ceramic

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Controlled synthesis and structural characterization of polycrystalline GaSe

Cited by 17 publications

References 9 publications

Sensitive Detection of Aqueous Methanol by Electrochemical Route Using Mesoporous α-Fe2O3 Doped CdSe Nanostructures Modified Glassy Carbon Electrode

Sensitive Detection of Aqueous Methanol by Electrochemical Route Using Mesoporous α-Fe2O3 Doped CdSe Nanostructures Modified Glassy Carbon Electrode

Structural and optical characterization of Cr2O3 nanostructures: Evaluation of its dielectric properties

Sintering Behavior and Microwave Dielectric Properties of Low-Permittivity SrMgSi2O6 Ceramic

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Sensitive Detection of Aqueous Methanol by Electrochemical Route Using Mesoporous α-Fe₂O₃ Doped CdSe Nanostructures Modified Glassy Carbon Electrode

Sensitive Detection of Aqueous Methanol by Electrochemical Route Using Mesoporous α-Fe₂O₃ Doped CdSe Nanostructures Modified Glassy Carbon Electrode