Boron is an essential element for bone health, but its cytotoxicity depends on its concentration. In the present study, borate-based 13-93B2 glass scaffolds doped with varying amounts of strontium (0-9 mol.% Sr) with a porosity of 80% and pore size of 200–500 μm were prepared by a polymer foam...
Strontium borate glasses containing different ratios of TiO2 were prepared. Thermal expansion measurements indicate variable and peculiar data in relation to the role of TiO2 in host SrO-B2O3 acting as both network former and modifier. The prepared glasses were nucleated around 500 °C except th...
Hydroxyapatite (HA) enriched with strontium and boron ions was synthesized using two different methods: the precipitation method (Sr,B-HAw) and the dry method (Sr,B-HAd). Additionally, for the sake of comparison, the “pure” unsubstituted HA was prepared together with HAs substituted only with ...
Several complex strontium borate matrices (Sr3(B2O6), Sr2(B2O5), SrB2O4, SrB4O7, SrB6O10 and SrB8O11) doped with Sm2+/3+ ions were prepared using a modified Pechini method, with increasing Sr2+/boric acid ratio and a two-step annealing process. The Sm3+ ions were transformed into Sm2+ ones witho...
Monodispersed strontium containing bioactive glass nanoparticles (Sr-BGNPs) with two compositions were synthesised, through a modified sol-gel Stöber process, wherein silica nanoparticles (SiO2-NPs) were formed prior to incorporation of calcium and strontium, with diameters of 90 ± 10 nm. The o...
The luminescent properties of undoped MB2O4 (M=Ca, Sr) have been studied upon X-ray and synchrotron excitation. The X-ray induced emission spectra of CaB2O4 consist mainly of two overlapping emission bands with maxima at about 3.19 and 3.65 eV. In addition to these features, there are several we...
While bioactive glass and ions released during its dissolution are known to stimulate osteoblast cells, the effect bioactive glass has on human stem cells is not clear. Here, we show that spherical monodispersed strontium containing bioactive nanoparticles (Sr-BGNPs) of composition 90.6 mol% SiO...
Single crystals of the strontium phosphate orthoborate metaborate, Sr10[(PO4)5.5(BO4)0.5](BO2), were grown from the melt and investigated by X-ray diffraction (space group P3¯, No. 147; a=9.7973(8) Å, c=7.3056(8) Å, V=607.29(10) Å3, Z=1). The crystal structure is closely related to apatite and ...
The undoped and 0.5% Ce3+-doped strontium metaborate SrB2O4 single crystals has been grown successfully by micro-pulling down method with radio frequency (RF) heating system, and scintillation characteristics including optical properties and radiation response were studied for these crystals. Th...
Intense visible emissions from dysprosium (Dy3+) ions doped glasses became prospective for diverse technological applications. In this paper, physical, optical and structural properties of magnesium borate glasses doped with varied concentrations of Dy2O3 were examined. Such glasses were synthes...
The influence of different heating rates as well as different atmospheres on magnesium borate fibers produced by electrospinning was investigated in this work. The green fibers were prepared from sol–gel precursors, using polyvinyl-pyrrolidone (PVP) as processing aid. Crystalline fibers with th...
Dienophiles 2-methyl-1,4-benzodithiin-1,4-tetroxide (3a), 2-phenyl-1,4-benzodithiin-1,4-tetroxide (3b) and 2,3-trimethylene-1,4-benzodithiin-1,4-tetroxide (3c) have been prepared with different methods starting from benzene-1,2-dithiol (1). Their reactivity was tested towards cyclopentadiene, su...
Several new sulfoxide and amide substituted benzoquinones have been employed as ligands in the Pd(II)-catalyzed 1,4-oxidation of 2-phenyl-1,3-cyclohexadiene (1). The sulfoxide ligand 4 is a superior ligand in the reaction affording high yield in the functionalization of this sensitive 1,3-diene,...
K0.405Bi0.865AsO4 compound has been prepared via solid state reaction. Its structure was determined using single crystal X-ray diffraction data. The space group was P31 with a = 7.237(1) Ǻ, c = 6.790(2) Ǻ and Z = 3. The crystal structure was made of BiO8 polyedra sharing corners and edges with A...
Recovery of bismuth and arsenic from copper smelter flue dusts after copper and zinc extraction was carried out by a hydrometallurgical process. The dusts were leached with a H2SO4–NaCl solution and precipitating bismuth and arsenic in the liquor was performed. The precipitate was leached with ...
Bismuth impregnated biochar were synthesized to deal with wastewater pollution. Nitrogen adsorption-desorption isotherms, scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) were used to determine ...
A simple and sensitive method for the sequential determination of phosphate and arsenate was developed based on initial ion chromatographic separation followed by detection as the ion-association complex formed by heteropolymolybdophosphate and arsenate with bismuth. With 200 μl sample injectio...
High mobility and toxicity of arsenic [As (III)] limit its removal from an aquatic environment and pose a threat to human health. In this work, batch adsorption experiments were conducted to investigate the adsorption capacity of bismuth-impregnated aluminum oxide (BiAl). Continuous application ...
Arsenic, antimony, and bismuth are usually found in association with minerals of some other metals. These materials are toxic, and under restricted conditions they are used for medical purposes. Pyrometallurgy and hydrometallurgy processes of all three elements and their compounds are discussed....
A new compound with the formula BiCu2AsO6 has been prepared. This dark green compound crystallizes in space group Pnma with a=12.253(1) Å, b=5.280(1) Å, c=7.577(1) Å, and Z=4. The structure contains (BiO2)− chains and (AsO4)3− tetrahedra. Square pyramidal coordination occurs for Cu2+ with the py...
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