Journal ArticleDOI
Infrared spectra of sodium phosphate glasses
Yasser M. Moustafa,K. El-Egili +1 more
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In this paper, the relative intensity of the IR bands responsible for the different phosphate units was analyzed to determine the relative spectrum intensity of different units, and it was shown that the substitution of P2O5 by Na2O influences the intermediate range order of the glass matrix.Abstract:
Infrared absorption spectra of sodium phosphate glasses, Na2O=30–50 mol%, have been studied in the region of 400–2000 cm−1. Spectra were analyzed to determine the relative intensity of the IR bands responsible for the different phosphate units. Spectral analyses has shown that the substitution of P2O5 by Na2O influences the intermediate range order of the glass matrix. Increasing Na2O content leads to a gradual degradation of the phosphate ring type structures, with consequent depolymerization causing compaction of the glass matrix. Analyses of IR spectra illustrates the reorganization effects of Na2O in the phosphate matrix.read more
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Review: the structure of simple phosphate glasses
TL;DR: In this paper, spectroscopic and diffraction studies of simple phosphate glasses, including v-P2O5 and binary phosphate compositions, are described and special attention is given to the structures of anhydrous ultraphosphate glasses, which have received close attention from the glass community only in the past six years.
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Enhanced photocatalytic activity and structural stability by hybridizing Ag3PO4 nanospheres with graphene oxide sheets
TL;DR: The integration of these advantages enables such GO-Ag(3)PO(4) hybrid material to be a nice photocatalyst for broad applications in a sewage treatment system.
Journal ArticleDOI
Copper and zinc decontamination from single- and binary-metal solutions using hydroxyapatite.
TL;DR: The sorption of Cu and Zn was well characterized by the Langmuir model and heavy metal immobilization was attributed to a two-step mechanism: first rapid surface complexation and secondly partial dissolution of hydroxyapatite and ion exchange with Ca followed by the precipitation of a heavy metal-containing hydroxyAPatite.
Journal ArticleDOI
Infrared studies of Na2O–B2O3–SiO2 and Al2O3–Na2O–B2O3–SiO2 glasses
TL;DR: In this article, a reasonable agreement between the N4 values calculated from IR spectra and those determined from NMR spectroscopy (or using literature models) could be attained under certain conditions.
Journal ArticleDOI
Bioactive Glasses and Glass-Ceramics for Healthcare Applications in Bone Regeneration and Tissue Engineering.
Hugo R. Fernandes,Anuraag Gaddam,Avito Rebelo,Daniela Brazete,George E. Stan,José M.F. Ferreira +5 more
TL;DR: A first general appraisal of the scientific output in the interrelated areas of bioactive glasses and glass-ceramics, scaffolds, implant coatings, and tissue engineering is presented to provide knowledge-based tools towards guiding young researchers in the design of new bioactive glass compositions, taking into account the desired functional properties.
References
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Journal ArticleDOI
Structural studies of silicates by solid-state high-resolution silicon-29 NMR
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Infrared reflectance spectra of lithium borate glasses
TL;DR: In this paper, the infrared reflectance spectra of lithium borate glasses (0.73 mol% Li 2 O) have been measured over a broad and continuous spectral range (30-4000 cm −1 ) in an attempt to study systematically their structure.
Journal ArticleDOI
Phosphate glass dissolution in aqueous solutions
TL;DR: In this article, a series of phosphate glasses having the composition (50 − X)M2O·(X)CaO·50P2O5 were monitored using pH stat titration techniques, solution analyses using inductively coupled plasma emission, and depth profiling of corroded glass surfaces for H and other elements using elastic recoil detection analysis and Rutherford backscattering.
Journal ArticleDOI
Vibrational spectroscopy of cation‐site interactions in phosphate glasses
B. N. Nelson,Gregory J. Exarhos +1 more
TL;DR: In this paper, the properties of the metaphosphate vibration in binary metal oxide glasses have been investigated and it has been shown that the vibrational frequency of the metal cation and the glass network is correlated with its mass, charge, and ionic radius.
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