Synthesis of Stable Bismuth Silicate with Sillenite Structure in the Na2O–Bi2O3–SiO2 System

Yastrebinskii, R. N.; Бондаренко, Геннадій Леонідович; Павленко, А. В.

doi:10.1134/s2075113318020326

Cited by 7 publications

(5 citation statements)

References 2 publications

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“…According to the TG data, only above 400 • C does the mass of the sample seen in Figure 5a begin to stabilize at a value of 100.3% of the initial one. Prior to this, there is a decrease in weight (approximately by 0.5%) between 200 • C and 260-270 • C followed by a sharp increase in mass between 270 and 400 • C. The DSC data presented in Figure 5b demonstrate an endo-peak of metallic bismuth melting just around 270 • C [34] and then the most intense exo-peak around 310 • C. The latter peak may be attributed to the αphase formation [35] and the α → β phase transition of Bi 2 O 3 [36]. Moreover, one cannot completely exclude formation of metastable bismuth metasilicate in this temperature range [35].…”

Section: Samples Bso_3 and Bso_4mentioning

confidence: 91%

“…Further heating of the sample leads to the most intense peak appearing around 290 • C (Figure 5b). It is narrower than that of non-irradiated material and can be attributed to the formation of metastable bismuth metasilicate [35]. Nonetheless, the possibility of bismuth oxide formation cannot be excluded.…”

Section: Samples Of the Bso_hν Groupmentioning

confidence: 91%

“…Diffraction patterns show that another joint Bi-Si phase (sillenite, Bi 12 SiO 20 , PDF-4 #00-037-0485) began to form after 600 • C, while phase Bi 4 (SiO 4 ) 3 (PDF-4 #00-035-1007) first emerged above 700 • C. The DSC curve in Figure 5b exhibits exo-peaks at 510 and 690 • C corresponding to the β-Bi 2 O 3 to Bi 2 SiO 5 transition [35] and to the recrystallization of metastable phase Bi 2 SiO 5 to stable sillenite Bi 12 SiO 20 [42], respectively. Above 700 • C, both Bi 2 SiO 5 and Bi 12 SiO 20 are known to interact with SiO 2 , resulting in the stable phase of Bi 4 (SiO 4 ) 3 [29].…”

Section: Samples Bso_5 Bso_6 Bso_7 and Bso_8mentioning

confidence: 98%

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Phase and Structural Thermal Evolution of Bi–Si–O Catalysts Obtained via Laser Ablation

et al. 2022

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Laser methods are successfully used to prepare complex functional nanomaterials, especially for biomedicine, optoelectronics, and heterogeneous catalysis. In this paper, we present complex oxide and composite nanomaterials based on Bi and Si produced using laser ablation in liquid followed by subsequent powder annealing. Two synthesis approaches were used, with and without laser post-treatment of mixed (in an atomic ratio of 2:1) laser-generated Bi and Si colloids. A range of methods were used to characterize the samples: UV-Vis diffusion reflection, IR and Raman spectroscopy, synchronous thermal analysis, X-ray diffraction, transmission electron microscopy, as well as specific surface-area evaluation. We also followed the dynamics of phase transformations, as well as composition, structure and morphology of annealed powders up to 800 °C. When heated, the non-irradiated series of samples proceeded from metallic bismuth, through β-Bi2O3, and resulted in bismuth silicates of various stoichiometries. At the same time, in their laser-irradiated counterparts, the formation of silicates proceeded immediately from the amorphous Bi2SiO5 phase formed after laser treatment of mixed Bi and Si colloids. Finally, we show their ability to decompose persistent organic molecules of Rhodamine B and phenol under irradiation with a soft UV (375 nm) source.

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Section: Samples Bso_3 and Bso_4mentioning

confidence: 91%

Section: Samples Of the Bso_hν Groupmentioning

confidence: 91%

Section: Samples Bso_5 Bso_6 Bso_7 and Bso_8mentioning

confidence: 98%

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Phase and Structural Thermal Evolution of Bi–Si–O Catalysts Obtained via Laser Ablation

et al. 2022

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“…Sodium lead bismuth silicate Na 2 O-PbO-Bi 2 O 3 -SiO 2 (NPBS) glass ceramics exhibit novel spectroscopic, [1][2][3] structural and thermal, [4][5][6][7] optical (i.e., high refractive index and large nonlinear refractive index specially suitable for broad transmission window from 0.5 to 4.5 μm [8] ), chromatic, [9] energy storage/discharge, [10] and radiation shielding properties. [11][12][13][14][15] Further, these properties can be efficiently tuned by doping different concentrations of some transition metal oxides (e.g., V 2 O 5 ). For example, 10Na 2 O-30PbO-10Bi 2 O 3 -(50 − x)SiO 2 glass ceramics doped with xV 2 O 5 (0 ≤ x ≤ 5 mol%) were intensively investigated by means of X-ray diffraction, scanning electron microscope, optical absorption, and electron paramagnetic resonance (EPR) techniques, [16] which exhibit the fluctuant d-d transition band as well as spin Hamiltonian parameters (SHPs), g factors, and hyperfine structure constants for the paramagnetic V 4+ (arising from reduction of the diamagnetic V 5+ in V 2 O 5 ), with the concentration x of V 2 O 5 dopant.…”

Section: Introductionmentioning

confidence: 99%

Studies on the local structure and spin Hamiltonian parameters for V⁴⁺ in Na₂O–PbO–Bi₂O₃–SiO₂ glass ceramics

Fan

Luo

et al. 2020

Magnetic Reson in Chemistry

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The local structure, d-d transition band, and spin Hamiltonian parameters (SHPs) are theoretically studied for the V 4+ probe in Na 2 O-PbO-Bi 2 O 3-SiO 2 (NPBS) glass ceramics containing V 2 O 5 dopant with various concentration x (0 ≤ x ≤ 5 mol%) by using the perturbation formulas of the SHPs for tetragonally compressed octahedral 3d 1 clusters. The first decreasing (or increasing) and then increasing (or decreasing) d-d transition band (= 10 D q) and hyperfine structure constants A // and A ⊥ (or g factors g // and g ⊥) with x can be suitably simulated with the similarly varying Fourier type concentration functions of cubic field parameter D q , covalence factor N, core polarization constant κ, and reduction factor H (or relative tetragonal compression ratio ρ), with the minima (or maxima) at the middle concentration x = 3 mol%, respectively. The above concentration variations of SHPs and the related quantities may originate from the modifications of local crystal field strength, tetragonal compression, and electron cloud distribution near the impurity V 4+ with x, corresponding to the highest [V 4+ ]/[V 5+ ] ratio at 3 mol%. Present studies would be helpful to explore novel sodium lead bismuth silicate glass ceramics by modifying the concentration of V 2 O 5 dopant.

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“…The authors have developed a method for producing highly dispersed sillenite bismuth silicate in system Na 2 O-Bi 2 O 3 -SiO 2 from water solutions of organosilicon monomers (sodium methylsiliconate) and bismuth nitrate (Yastrebinskii et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Topochemical Transformations in Sodium-Bismuth-Silicate System at 100–900 ℃

Павленко

Yastrebinskiy

2019

Springer Proceedings in Earth and Environmental Sciences

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The authors have developed a method for producing highly dispersed sillenite bismuth silicate in the system Na 2 O-Bi 2 O 3-SiO 2 (NBS) from water solutions of organosilicon monomers (sodium methylsiliconate) and bismuth nitrate. The paper studies the phase composition and microstructure of the synthesized NBS material at different temperatures. The morphology of crystals in the NBS material and the peculiarities of its thermal-oxidative breakdown are investigated. X-ray diffraction spectra obtained using a cuК a-source are used to evaluate the crystal lattice spacing and to analyze the broadening of the maximum-intensity diffraction line for this crystal with due consideration of crystal indices h, k, l by the approximation method to determine the dimensions of the coherent scattering region and microdistortions of the crystal lattice Da/a. The authors established that the silicate shell on Bi 12 SiO 20 particles is close to the silicates with continuous chain radicals [SiO 3 ] ∞ 2− , and a part of them are bridges between the bismuth silicate particles.

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Synthesis of Stable Bismuth Silicate with Sillenite Structure in the Na2O–Bi2O3–SiO2 System

Cited by 7 publications

References 2 publications

Phase and Structural Thermal Evolution of Bi–Si–O Catalysts Obtained via Laser Ablation

Phase and Structural Thermal Evolution of Bi–Si–O Catalysts Obtained via Laser Ablation

Studies on the local structure and spin Hamiltonian parameters for V⁴⁺ in Na₂O–PbO–Bi₂O₃–SiO₂ glass ceramics

Topochemical Transformations in Sodium-Bismuth-Silicate System at 100–900 ℃

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Synthesis of Stable Bismuth Silicate with Sillenite Structure in the Na2O–Bi2O3–SiO2 System

Cited by 7 publications

References 2 publications

Phase and Structural Thermal Evolution of Bi–Si–O Catalysts Obtained via Laser Ablation

Phase and Structural Thermal Evolution of Bi–Si–O Catalysts Obtained via Laser Ablation

Studies on the local structure and spin Hamiltonian parameters for V4+ in Na2O–PbO–Bi2O3–SiO2 glass ceramics

Topochemical Transformations in Sodium-Bismuth-Silicate System at 100–900 ℃

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Studies on the local structure and spin Hamiltonian parameters for V⁴⁺ in Na₂O–PbO–Bi₂O₃–SiO₂ glass ceramics