Bioactive glass (BG) is considered to be one of the most remarkable materials in the field of bone tissue regeneration due to its superior bioactivity. In this study, both un-treated and polyethylene glycols (PEG)-treated BG particles were prepared using a spray pyrolysis process to study the correlation between particle morphology and degradation behavior. The phase compositions, surface morphologies, inner structures, and specific surface areas of all BG specimens were examined by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and nitrogen adsorption/desorption, respectively. Simulated body fluid (SBF) immersion evaluated the assessments of bioactivity and degradation behavior. The results demonstrate three particle morphologies of solid, porous, and hollow factors. The correlation between porosity, bioactivity, and degradation behavior was discussed.
In this study, we demonstrate the fabrication of Y-doped bioactive glass (BG), which is proposed as a potential material for selective internal radiotherapy applications. Owing to its superior bioactivity and biodegradability, it overcomes the problem of yttrium aluminosilicate spheres that remain in the host body for a long duration after treatment. The preparation of Y-doped BG powders were carried out using a spray pyrolysis method. By using two different yttrium sources, we examine the change of the local distribution of yttrium concentration. In addition, characterizations of phase information, particle morphologies, surface areas, and bioactivity were also performed. The results show that both Y-doped BG powders are bioactive and the local Y distribution can be controlled.
This article reports polymer solar cell performance evaluated using general-purpose photovoltaic device model (GPVDM) software for various device structures. The essential parameters of the cell such as short circuit current density (JSC), open-circuit voltage (VOC), fill factor (FF), and power conversion efficiency (PCE) are evaluated for these structures. The simulation result shows the performance of the cells could be highly affected by both interfacial and active layers. Among the demonstrated device structures, better performance is observed for device structure ITO/V2O5/PTB7 : PC70BM/TiOx/Al with 10.4 mA/cm2 short circuit current density, 0.89 V open-circuit voltage, 59.5% fill factor, and 6.1% power conversion efficiency. The study is useful for a better understanding of the powerful effect of the materials in the device structure on the performance of the cell and thereby determines the proper device structure and materials for improving the performance of the cell.
Cu1–xNixO/Fe2O3 (with x = 0.01, 0.02, 0.03, 0.04 wt%) were synthesized by plant extraction technique. The absorbance and degradation performance of Ni-doped CuO and Fe2O3 nanocomposite against methylene blue (MB) was analyzed, and the 2% Ni-doped CuO yielded an optimum result, and the optical bandgap of CuO, 2NCO, Fe2O3, and (60%) 2NCO/40% Fe2O3 was found to be 1.88, 1.73, 2.1, and 1.80 eV, respectively. Hence, the 2% Ni-doped CuO (2NCO) was further used for the establishment of a composite with Fe2O3. The lowest composition of the oxide composite was (1−x) 2NCO/(x) Fe2O3 (x = 0.1, 0.2, 0.3, 0.4, and 0.5). The degradation performance of those oxide composites was determined against (MB) with the nominal composition of sample (60%) 2NCO/40% Fe2O3 resulted in an optimum degradation of MB with a percentage of 94% at 120 min. The recyclability takes a look at was performed for five cycles at the start of 94%; after five cycles, the sample remained stable at 120 min. Therefore, 2NCO/40% Fe2O3 composite is going to be the selection material for waste product treatment.
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