Structural, optical, and nuclear magnetic resonance studies of V2O5-doped lead calcium titanate borosilicate glasses

Das, Sangeeta; Madheshiya, Abhishek; Ghosh, Manasi; Dey, Krishna Kishor; Gautam, Satyam Shivam; Singh, Jai; Mishra, Ramanuj; Gautam, Chandkiram

doi:10.1016/j.jpcs.2018.10.030

Cited by 28 publications

(5 citation statements)

References 52 publications

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“…24 ppm were changed by the charge and discharge processes, possibly due to the oxidization and reduction of B− B bonds, which is consistent with the XPS result. Besides, the peak at 20.62 ppm for Pristine-LiBC is possibly corresponding to the reduced state of B−B bonds, the peaks at 0.95, 0.17, and 3.89 ppm should be attributed to the chemical state of BO 4 , 38,39 and the peak at −9.66 ppm for H 2 O-LiBC is possibly due to a boron compound produced in the aqueous reaction. 40,41 Furthermore, we also analyzed the supernatant liquids of CH 3 OH-LiBC, H 2 O-LiBC, and pH12-LiBC to find the lost mass after the reactions in the methanol and aqueous solutions.…”

Section: Resultsmentioning

confidence: 99%

The Structure Evolution of Hydroxyl-Reacted LiBC to Improve the Capacity for Li-Ion Batteries

Peng

Chen

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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As a graphite-like material, the LiBC can deliver a high capacity up to 500 mA h g–1 in Li-ion batteries, which is dependent on the carbon precursor, the high-temperature treatment, and the lithium insufficiency. However, the underlying mechanism is still not clear for the electrochemical reactions of LiBC. In this work, the pristine LiBC was reacted with aqueous solutions of different alkalinity, which was delithiated chemically and retained the layered structure. According to the XPS and NMR results, the B–B bond might be produced through the aqueous reaction or the initial charge process, which can be oxidized (charged) and reduced (discharged) in the electrochemical measurements. In the Li-ion battery, the reversible capacity of LiBC increases evidently with the alkalinity of aqueous solution and significantly rises to a similar value of ca. 285 mA h g–1 under 200 cycles. Therefore, the specific capacity of LiBC should be contributed by the active sites of B–B bonds, which can be significantly increased through the reaction with the hydroxyl ions, and this strategy might be adopted to activate more graphite-like materials.

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Section: Resultsmentioning

confidence: 99%

The Structure Evolution of Hydroxyl-Reacted LiBC to Improve the Capacity for Li-Ion Batteries

Peng

Chen

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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“…The energy dispersion parameter for the refractive index is estimated using the Wemple and DiDomenico (WDD) single oscillator model [27,31]:…”

Section: Juniper Online Journal Materials Sciencementioning

confidence: 99%

“…The quantities describe the energy loss rate for an electron passing through a material has been studied for the following BPV glass samples. The quantities known the volume energy loss function (VELF) and surface energy loss function (SELF)[27].…”

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confidence: 99%

Enhancement of Optical Properties of Borate Glass Doped with Vanadium Oxide

Henaish

2022

JOJMS

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In this work we examine physical, structural and optical properties of borate glass via experimental and theoretical techniques. The composition of our glass samples is (50-X) B 2 O 3 + 50 Pb 3 O 4 + X V 2 O 5 encoded into [BPV glass system] where x= (0, 0.1, 0.2, 0.3, 0.4 and 0.5) were prepared using melt quenching method. X-ray diffraction technique confirmed the formation of BPV glass system. Characteristic absorption bands were observed in infrared spectra assigned to vibrational modes. The optical properties of the prepared samples were measured using UV-visible spectra and Photoluminescence. The optical energy band gap E g (direct and indirect) calculated using Tauc,s equation and found that direct energy gap decreases from 2.42 ev to 2.26 ev and indirect energy gap decreases from 2.57 ev to 2.52 ev as vanadium oxide increase and that Urbach energy Eu decreased from 0.21 ev to 0.18 ev. The refractive index increased by V 2 O 5 content increased and steepness parameter increased also. The dielectric constant (ε) and optical conductivity (σ) have the same behavior decrease by increasing vanadium oxide content. Photoluminescence shows an emission wavelength that ranges from 400 nm to 1000 nm.

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“…Where ρ L is the density of double distilled water at room temperature, W A and W L are the weight of the glass samples in air and liquid. However, the molar volumes, V m has been also calculated using density values from equation (1) and then substituted in the following relation [48,50]…”

Section: Density and Molar Volumementioning

confidence: 99%

Synthesis and characterization of [BaO-(10-x)ZrO₂-TiO₂-SiO₂-xCrO₃] type glass and glass ceramics

Fatima

Hussain

Gautam

et al. 2020

Journal of Asian Ceramic Societies

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Various glass compositions were prepared in a glassy system [25BaCO 3-(10-x) ZrO 2-20TiO 2-45SiO 2-xCrO 3 ] (x = 0, 2, 4, and 6) using melt-quenching technique. XRD patterns of glass and glass ceramics showed amorphous and crystalline nature. Density of glass and glass ceramics decreased from 3.4553 to 3.4381 g/cm 3 and 3.7485 to 3.1977 g/cm 3 with increasing concentration of CrO 3. DTA of the glasses revealed a shift in base line which suggests a change in specific heat and attributed to the glass transition temperature, T g. FTIR and Raman spectroscopic analysis indicated that an increasing doping of CrO 3 changes structural network by increasing number of nonbridging oxygens (NBO) within glassy matrix. These results revealed that bands toward low frequency side endorsed to the vibration of Ba 2+ metal cation, bending vibration of Si-O-Si and bonding formation of ZrO 2. Concentration of CrO 3, changed the microsture significantly and hence, a denser, fully developed mixed morphology was noticed with spherical grains of ZrO 2 , irregular shape of bazirite (BaZr 0.97 Ti 0.03 Si 3 O 9) phase and TiO 2 grains. Glass ceramic sample BZTS6C971 CrO 3 (x = 6) retains high value of dielectric constant, ~4555 due to space charge polarization. Hence, these glass ceramics might be useful for diverse applications such as in optical devices, electronic circuits, and multilayer ceramic capacitors.

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Structural, optical, and nuclear magnetic resonance studies of V2O5-doped lead calcium titanate borosilicate glasses

Cited by 28 publications

References 52 publications

The Structure Evolution of Hydroxyl-Reacted LiBC to Improve the Capacity for Li-Ion Batteries

The Structure Evolution of Hydroxyl-Reacted LiBC to Improve the Capacity for Li-Ion Batteries

Enhancement of Optical Properties of Borate Glass Doped with Vanadium Oxide

Synthesis and characterization of [BaO-(10-x)ZrO₂-TiO₂-SiO₂-xCrO₃] type glass and glass ceramics

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Structural, optical, and nuclear magnetic resonance studies of V2O5-doped lead calcium titanate borosilicate glasses

Cited by 28 publications

References 52 publications

The Structure Evolution of Hydroxyl-Reacted LiBC to Improve the Capacity for Li-Ion Batteries

The Structure Evolution of Hydroxyl-Reacted LiBC to Improve the Capacity for Li-Ion Batteries

Enhancement of Optical Properties of Borate Glass Doped with Vanadium Oxide

Synthesis and characterization of [BaO-(10-x)ZrO2-TiO2-SiO2-xCrO3] type glass and glass ceramics

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Synthesis and characterization of [BaO-(10-x)ZrO₂-TiO₂-SiO₂-xCrO₃] type glass and glass ceramics