Structural units distribution, phase separation and properties of PbO–TiO 2 –B 2 O 3 glasses

Doweidar, H.; El-Egili, K.; Ramadan, R.; Al-Zaibani, M.

doi:10.1016/j.jnoncrysol.2017.03.040

Cited by 33 publications

(10 citation statements)

References 37 publications

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“…The band at 606 cm –1 represents the out-of-plane vibrations (twisting or rocking) of Ti–C . Moreover, the peak at 529 cm –1 was probably due to the deformation vibration of the Ti–O bond . The FTIR spectrum of MXene is also featured by the presence of asymmetric/symmetric methyl and methylene stretching bands at 2894 and 2985 cm –1 , respectively.…”

Section: Resultsmentioning

confidence: 99%

“…36 Moreover, the peak at 529 cm −1 was probably due to the deformation vibration of the Ti−O bond. 37 The FTIR spectrum of MXene is also featured by the presence of asymmetric/symmetric methyl and methylene stretching bands at 2894 and 2985 cm −1 , respectively. These CH 3 and CH 2 groups in MXene, as well as MAX, may be attributed to the presence of some amorphous carbon in the samples.…”

Section: ■ Introductionmentioning

confidence: 99%

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Synthesis of Ultrathin MnO₂ Nanowire-Intercalated 2D-MXenes for High-Performance Hybrid Supercapacitors

et al. 2021

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Recently, the MXene itself and its composites with various metal oxides have shown excellent electrochemical performance due to the presence of multiple oxidation states. However, the restacking of MXene layers and poor electrical conductivity of metal oxides are major bottlenecks in their effective electrochemical transport, when they are applied individually. Herein, we report a novel manganese oxide/MXene (MnO 2 /MXene) composite material to overcome these critical issues. Sub-50 nm-thick MnO 2 nanowires (NWRs) were introduced inside the MXene to effectively stop the restacking as well as to increase the surface area of the supercapacitor (SC) electrode material. The special control on the thickness of NWRs is not only providing an opportunity to adjust them inside the MXene layers but also giving a high surface area. Electrochemical studies suggested that the MnO 2 /MXene composite behaves as an excellent electrode material for hybrid SCs, as compared to individual MXene and MnO 2 . Maximum specific capacitance (C sp ) of MXene, MnO 2 NWRs, and MnO 2 /MXene composite was observed to be about 527.8, 337.5, and 611.5 F/g, respectively. The calculated specific capacity of the MnO 2 /MXene composite was about 489.5 C/g at 1 A/g, which shows better performance as an electrode material for energy storage devices. The synthesized electrode material demonstrated excellent capacitance retention of about 96% up to 1000 cycles.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Synthesis of Ultrathin MnO₂ Nanowire-Intercalated 2D-MXenes for High-Performance Hybrid Supercapacitors

et al. 2021

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“…Further, various distinctive peaks at 2993, 1676, and 1048 cm –1 in the IR spectrum of MXene are assigned to the asymmetric/symmetric methylene stretching band, CO stretching vibrational frequency, and carbon to fluorine (C–F) bonds, respectively. , The band at 609 cm –1 signifies the out-of-plane vibrations of Ti–C . Furthermore, the characteristic bands at 547 and 490 cm –1 are owing to the deformation frequency of the Ti–O bond of TiO 2 . FT-IR spectra of CuO@βCD/MXene (1:1) revealed various vibration bands that are associated with CuO@βCD as well as MXene peaks such as Cu(II)–O, Ti–O, Ti–C, C–F, O–H, CO, C–H, and molecular water.…”

Section: Resultsmentioning

confidence: 98%

“…47 Furthermore, the characteristic bands at 547 and 490 cm −1 are owing to the deformation frequency of the Ti−O bond of TiO 2 . 48 FT-IR spectra of CuO@βCD/ MXene (1:1) revealed various vibration bands that are associated with CuO@βCD as well as MXene peaks such as Cu(II)−O, Ti−O, Ti−C, C−F, O−H, C�O, �C−H, and molecular water. The peak at 618 cm −1 in bare CuO@βCD is shifted to 451 cm −1 in CuO@βCD/MXene (1:1), which approves the existence of the Cu(II)−O bond in the synthesized composite.…”

Section: Measurement Of Electrochemical Performance Of Cuo@mentioning

confidence: 99%

β-Cyclodextrin-Stabilized CuO/MXene Nanocomposite as an Electrode Material for High-Performance Supercapacitors

Rajeeve,

Yamuna,

Vinoba

et al. 2023

Langmuir

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“…It is supposed that N4 represents the consequent modification of borate matrix. Taking in consideration in the case of including more than one type of modifier, each modifier shares for N4 with specific factor that relies on the modifier content [23,24]. This can be formulated as N4 = N4(Fe) + N4(Bi).…”

Section: Infrared Spectramentioning

confidence: 99%

Structural investigation of Fe2O3–Bi2O3–B2O3 glasses

El-Egili

Ghazal

2021

Egypt. J. Chem.

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The structure of xFe2O3•(30-x)Bi2O3•70B2O3 and xFe2O3•(50-x)Bi2O3•50B2O3 glasses (mol%) was investigated by FTIR, XRD and SEM. Increasing Fe2O3 content causes decreasing in the fraction N4 of four coordinated boron atoms of both series. FTIR analyses indicate that Fe2O3 tends preferentially to form its former matrix and the majority of BO4 units are modified by Bi 3+ ions. XRD patterns confirm that only α-Fe2O3 crystalline phase appears in the glasses with Fe2O3 ≥ 15 mol% for the first group and Fe2O3 ≥ 25 mol% for the second one. 50Bi2O3-50B2O3 glass in the second group has tendency to crystallization when heat treated. SEM shows that spherical particles are separated from the main matrix with different sizes in both glass groups. There is a linear decrease of density in both series with replacing Bi2O3 by Fe2O3. The molar volume seems to be constant in the first group, whereas it decreases in the second one. Calculated density and molar volume are in a good agreement with the experimental data.

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Structural units distribution, phase separation and properties of PbO–TiO 2 –B 2 O 3 glasses

Cited by 33 publications

References 37 publications

Synthesis of Ultrathin MnO₂ Nanowire-Intercalated 2D-MXenes for High-Performance Hybrid Supercapacitors

Synthesis of Ultrathin MnO₂ Nanowire-Intercalated 2D-MXenes for High-Performance Hybrid Supercapacitors

β-Cyclodextrin-Stabilized CuO/MXene Nanocomposite as an Electrode Material for High-Performance Supercapacitors

Structural investigation of Fe2O3–Bi2O3–B2O3 glasses

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Structural units distribution, phase separation and properties of PbO–TiO 2 –B 2 O 3 glasses

Cited by 33 publications

References 37 publications

Synthesis of Ultrathin MnO2 Nanowire-Intercalated 2D-MXenes for High-Performance Hybrid Supercapacitors

Synthesis of Ultrathin MnO2 Nanowire-Intercalated 2D-MXenes for High-Performance Hybrid Supercapacitors

β-Cyclodextrin-Stabilized CuO/MXene Nanocomposite as an Electrode Material for High-Performance Supercapacitors

Structural investigation of Fe2O3–Bi2O3–B2O3 glasses

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Synthesis of Ultrathin MnO₂ Nanowire-Intercalated 2D-MXenes for High-Performance Hybrid Supercapacitors

Synthesis of Ultrathin MnO₂ Nanowire-Intercalated 2D-MXenes for High-Performance Hybrid Supercapacitors