Synthesis, characterization and bioactivity of bioglasses in the Na2O–CaO–P2O5–SiO2 system prepared via sol gel processing

Catteaux, Rémy; Grattepanche-Lebecq, Isabelle; Désanglois, Françoise; Chai, Feng; Hornez, Jean‐Christophe; Hampshire, Stuart; Follet-Houttemane, Claudine

doi:10.1016/j.cherd.2013.05.017

Cited by 21 publications

(13 citation statements)

References 15 publications

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“…The broad band at ~790 cm −1 can be identified as the bending vibration of Si–O–Si . The small notched peak at ~660 cm −1 can be assigned to the Si–O–Ca asymmetric bending mode, becoming more defined as the calcium modifies the silica structure and starts to form the crystalline calcium silicate phase as depicted by XRD (Figure ), and indeed these 2 peaks are strongest in S75C16‐2 and S75C16‐3 .…”

Section: Resultsmentioning

confidence: 90%

“…23 The broad band at~790 cm À1 can be identified as the bending vibration of Si-O-Si. 22 The small notched peak at 660 cm À1 can be assigned to the Si-O-Ca asymmetric bending mode, 24 becoming more defined as the calcium modifies the silica structure and starts to form the crystalline calcium silicate phase as depicted by XRD (Figure 3), and indeed these 2 peaks are strongest in S75C16-2 and S75C16-3. The small band near 860 cm À1 is a common feature for alkali silicate glass and assigned to Na, but T A B L E 2 The structural parameters of the stabilized glasses assessed by 29 Si MAS-NMR spectroscopy, degree of polymerization (Q n ) degree of condensation (D c ), and network connectivity (N c ) it also may be attributed to the presence of Ca.…”

Section: Ftir Analysis Of Glassesmentioning

confidence: 98%

“…The shoulder at~1220 cm À1 represents the Si-O-Si (TO 2 ) stretching mode. 21 The stretching vibration band at~950 cm À1 is assigned to Si-OH, 22 and Si-O À might also have a contribution to this vibration band. 23 The broad band at~790 cm À1 can be identified as the bending vibration of Si-O-Si.…”

Section: Ftir Analysis Of Glassesmentioning

confidence: 99%

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Effects of catalysts on polymerization and microstructure of sol‐gel derived bioglasses

et al. 2018

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This work investigates the effects of the type and concentration of acid catalysts on the microstructural features of silica‐rich bioactive glasses (75Si–16Ca–5Na–4P, in mol%) synthesized from acetate and nitrate precursor salts, using an innovative rapid sol‐gel method, followed by thermal stabilization at 550°C. The results of XRD, SEM, Fourier Transform Infrared Spectrometer (FTIR) and solid state MAS NMR analysis revealed that the lower degrees of polymerization and network connectivity were found for bioglass powders obtained in the presence of high acid concentrations. A low amount of citric acid gave a polymerization degree similar to that obtained in the absence of any catalyst, but the synthesis time was as short as that found for high acid concentrations. The XRD and FTIR results demonstrated amorphous glass powders free of any nitrate by‐products. The microstructure and degree of polymerization could be modified by changing the type and concentration of acid catalyst, enabling one to tailor the bioactivity of glasses even without changing the starting composition.

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Section: Resultsmentioning

confidence: 90%

Section: Ftir Analysis Of Glassesmentioning

confidence: 98%

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Effects of catalysts on polymerization and microstructure of sol‐gel derived bioglasses

et al. 2018

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“…Glass-ceramics in SiO 2 -CaO-Na 2 O-P 2 O 5 system have been reported by many authors [10,12,[19][20][21][22][23][24][25][26][27][28][29][30][31]. Among them, majority are by melt-quenching method [10,[19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

“…Among them, majority are by melt-quenching method [10,[19][20][21][22][23][24]. There are some reports in sol-gel synthesis [12,[25][26][27][28][29][30][31]. Although there is no requirement of Na 2 O in sol-gel glass as its role in traditional glass synthesis is to lower the melting point, it is employed in various sol-gel-based bioactive glasses because it improves the solubility of glass in aqueous media and it offers advantages during crystallization of the glass through heat treatment [13,30].…”

Section: Introductionmentioning

confidence: 99%

Sol–gel synthesis and in vitro bioactivity of glass–ceramics in SiO2–CaO–Na2O–P2O5 system

Thomas

Bera

2016

J Sol-Gel Sci Technol

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Bioactive glass-ceramic powder in SiO 2 -CaONa 2 O-P 2 O 5 system was successfully synthesised through a modified sol-gel route. The gel was prepared using tetraethyl orthosilicate, calcium nitrate, sodium nitrate and triethyl phosphate raw materials. The gel was calcined in the temperature range 700-1050°C to get the glass-ceramic powder. Dissolution of the glass-ceramic powder was studied by in vitro immersion in Tris buffer solution for various period of time. The biodegraded powder was analyzed using XRD. The sintered glass-ceramic was characterized for in vitro bioactivity in simulated body fluid, and the incubated pellet was then analyzed for phase identification by XRD, surface morphology using SEM and elemental analysis using energy-dispersive X-ray analysis. The biocompatibility of the glass-ceramics was evaluated through MTT assay using MG-63 cells. Graphical Abstract

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Exploring the spectroscopic and I‑V‑T characteristics advancements of cadmium zinc tungsten phosphate diode

Mansour,

Nahrawy,

Hammad

2024

Appl. Phys. A

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This research accomplished the growth of cadmium zinc tungsten phosphate (CZWP) thin films on both glass and p-Si substrates, employing the sol–gel spin coating method. The sol–gel technique offers a versatile and controlled approach for fabricating nanomaterials with tailored properties. The structural and morphological analyses, conducted through XRD and FE-SEM, provided comprehensive insights into the nature of the films. The optical properties, absorbance behavior, energy gap, refractive indices, dielectric, conductivity, and electronegativity, underwent meticulous examination through UV–Vis spectroscopy. The X-ray diffraction analysis of the zinc cadmium tungsten phosphate diode reveals diffraction lines indicative of a nanostructure featuring a monoclinic-phase Zn2P2O7 and Cd3P6O28. Furthermore, SEM analysis confirms a nanoporous morphology with a nanograpes-like structure in the successful crystalline structure of the cadmium zinc tungsten phosphate nanostructure. The optical absorption studies, covering a wavelength range from 190 to 1500 nm, unveiled both direct and indirect energy band gaps, measuring 4.14 and 3.77 eV, respectively. A rigorous analysis of the I-V-T characteristics for the CZNP/p-Si junction in dark mode led to the identification of key parameters, including the transport ideality factor, barrier height, and series resistance.

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Synthesis, characterization and bioactivity of bioglasses in the Na2O–CaO–P2O5–SiO2 system prepared via sol gel processing

Cited by 21 publications

References 15 publications

Effects of catalysts on polymerization and microstructure of sol‐gel derived bioglasses

Effects of catalysts on polymerization and microstructure of sol‐gel derived bioglasses

Sol–gel synthesis and in vitro bioactivity of glass–ceramics in SiO2–CaO–Na2O–P2O5 system

Exploring the spectroscopic and I‑V‑T characteristics advancements of cadmium zinc tungsten phosphate diode

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