The new Aurivillius layered perovskite compounds, AgNaBiNbO (AGBNO), were successfully synthesized using a hydrothermal technique followed by conventional, microwave-assisted, and acid-assisted ion exchange procedures. The formation of these compounds was evidenced by several techniques. A single-phase crystal structure was identified by XRD patterns, and expanded lattice parameters were revealed by crystal structure refinement.
View Article and Find Full Text PDFThis study investigates the correlation between the biomedical and structural properties of Zn/Sr-modified Calcium Phosphates (ZnSr-CaPs) synthesized via the sol-gel combustion method. X-ray diffraction (XRD) analysis revealed the presence of Ca(PO)(OH) (HAp), CaCO, and Ca(OH) phases in the undoped sample, while the additional phase, Ca(PO) (β-TCP) was formed in modified samples. X-ray absorption near-edge structure (XANES) analysis demonstrated the incorporation of Sr into the lattice, with a preference for occupying the Ca1 sites in the HAp matrix.
View Article and Find Full Text PDFIn this study, the interplay between the structural complexity, microstructure, and mechanical properties of calcium phosphates (CaPs) derived from fish bones, prepared at various calcination temperatures, and their corresponding sintered ceramics was explored. Fourier-transform infrared analysis revealed that the calcined powders primarily consisted of hydroxyapatite (HAp) and carbonated calcium hydroxyapatite, with an increasing concentration of Mg-substituted β-tricalcium phosphate (β-TCP) as the calcination temperature was increased. X-ray diffraction patterns showed enhanced sharpness of the peaks at higher temperatures, indicating a larger crystallite size and improved crystallinity.
View Article and Find Full Text PDFThis work aimed to develop new antibiotic-coated/ antibiotic-loaded hydroxyapatite (HAp) scaffolds for orthopaedic trauma, specifically to treat the infection after fixation of skeletal fracture. The HAp scaffolds were fabricated from the Nile tilapia ( bones and fully characterized. The HAp scaffolds were coated with 12 formulations of poly (lactic--glycolic acid) (PLGA) or poly (lactic acid) (PLA), blended with vancomycin.
View Article and Find Full Text PDFLow-cost, high-efficiency, and high quality Cl-doped ZnO (ZnO:Cl) thin films that can simultaneously function as transparent conducting oxides (TCOs) and photocatalysts are described. The films have been fabricated by a facile and inexpensive solution-source aerosol-assisted chemical vapor deposition technique using NHCl as an effective, cheap, and abundant source of Cl. Successful Cl substitutional doping in the ZnO films was evident from powder X-ray diffraction, X-ray photoelectron spectroscopy, and time-of-flight secondary ion mass spectrometry results, while scanning electron microscopy reveals the impact of Cl doping on the ZnO thin film morphology.
View Article and Find Full Text PDFType I heterojunction films of α-Fe O /ZnO are reported here as a non-titania based photocatalyst, which shows remarkable enhancement in the photocatalytic properties towards stearic acid degradation under UVA-light exposure (λ=365 nm), with a quantum efficiency of ξ=4.42±1.54×10 molecules degraded/photon, which was about 16 times greater than that of α-Fe O , and 2.
View Article and Find Full Text PDFA facile molten salt technique is an interesting preparation method as it enables mass production of materials. With the use of CsNO salt, Cs-intercalated MnO hollow microflowers are obtained in this work. δ-MnO with a layered structure, instead of other allotropes with smaller structural cavities, is formed and stabilized by large Cs ions.
View Article and Find Full Text PDFACS Appl Mater Interfaces
December 2017
Robust superhydrophobic surfaces were synthesized as composites of the widely commercially available adhesives epoxy resin (EP) and polydimethylsiloxane (PDMS). The EP layer provided a strongly adhered micro/nanoscale structure on the substrates, while the PDMS was used as a post-treatment to lower the surface energy. In this study, the depositions of EP films were taken at a range of temperatures, deposition times, and substrates via aerosol-assisted chemical vapor deposition (AACVD).
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