There is a growing interest in the development of new methods for extraction of REEs from nuclear wastes. In this study, we fabricated a novel material composed of 1,10-phenanthroline-2,9-dicarboxilic acid (PDA) functionalized magnetic graphene oxide (Fe3O4/GO) for extr More
There is a growing interest in the development of new methods for extraction of REEs from nuclear wastes. In this study, we fabricated a novel material composed of 1,10-phenanthroline-2,9-dicarboxilic acid (PDA) functionalized magnetic graphene oxide (Fe3O4/GO) for extraction of Sm(III) from aqueous solutions. Our interest in selection of carboxyl-containing ligand was due to its good coordination characteristic with Sm (III) which can be used to design a new sorbent. Under the optimized extraction conditions, the calibration graph for Sm (III) was linear in a concentration range of 6.2-784.5 µg L-1 with a correlation coefficient of 0.9900. A detection limit of 1.4 μg L−1 with an enrichment factor of 125 was obtained. Precisions, expressed as relative standard deviation for single-sorbent repeatability and sorbent-to-sorbent reproducibility, were 5.9% and 8.7% (n =5), respectively. Finally, spiked sea and river waters were analysed to evaluate the performance of the proposed method. The high recoveries (>%97) indicates that the suggested protocol is acceptable for determination of Sm (III) ions in the water samples.
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The development of drug resistance, treatment ineffectiveness, and the occurrence of Pseudomonas aeruginosa infections are primarily attributed to biofilm formation and quorum sensing (QS)-dependent virulence factors. This study aimed to synthesize samarium oxide nanopa More
The development of drug resistance, treatment ineffectiveness, and the occurrence of Pseudomonas aeruginosa infections are primarily attributed to biofilm formation and quorum sensing (QS)-dependent virulence factors. This study aimed to synthesize samarium oxide nanoparticles (Sm2O3NPs) using curcumin and evaluate their antimicrobial effects against P. aeruginosa isolated from different hospital wards. Based on TEM, XRD, and EDX analysis, the synthesized nanoparticles exhibited a cubic structure with an average size of 32.61 nm and a pure crystalline phase. The Sm2O3NPs exhibited notable antibacterial efficacy against P. aeruginosa strains. Based on the CV staining assay, sub-MIC of Sm2O3NPs inhibited the biofilm formation of P. aeruginosa strains by 16-69%. Additionally, the levels of pyocyanin in the NPs-treatment groups decreased by 29-58% compared to the control group. This research confirms the significant antibacterial potential of Sm2O3NPs, implying their potential utilization as an effective antibacterial agent against P. aeruginosa strains isolated from various hospital wards, after further characterization.
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A surfactant assisted Co-Precipitation method was employed for the synthesis of magnesium aluminate spinel with nanocrystalline size and high specific surface area. Calcination operations were performed in 800-1000° C for two hours. Different percentages of samarium More
A surfactant assisted Co-Precipitation method was employed for the synthesis of magnesium aluminate spinel with nanocrystalline size and high specific surface area. Calcination operations were performed in 800-1000° C for two hours. Different percentages of samarium were doped to magnesium aluminate spinel to examine the properties of magnesium aluminate spinel. The prepared samples were characterized by thermal gravimetric and differential thermal gravimetric analyses (TG/DTA), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Transmission electron microscopy (TEM), and photoluminescence spectrum (PL). XRD results showed that nanocrystals of magnesium aluminate spinel were influenced by the type of surfactant in 800° C. The results of luminescence spectrum show that by increasing the amount of samarium after 0.15 of weight percentage, concentration suppression happens and reduces the intensity of luminescence properties.
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Seductive and impressive applications of samarium oxide based materials in semiconductor science, created an interest to synthesize and study their physical properties. Therefore, after preparing pure samarium oxide and graphene/samarium oxide powders through hydrotherm More
Seductive and impressive applications of samarium oxide based materials in semiconductor science, created an interest to synthesize and study their physical properties. Therefore, after preparing pure samarium oxide and graphene/samarium oxide powders through hydrothermal technique; with use of X-Ray diffraction (XRD), field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, and UV-Visible spectrophotometry; structural, optical, and morphological properties of the samples have been evaluated. Using XRD, lattice constants and some related structural parameters were determined. Variation of optical band gap has been calculated too, with aiding absorbance, The XRD data revealed prevailed cubic samarium oxide phase in both samples, even though a sharp diffraction peak of graphene was attended in graphene/samarium oxide sample. SEM, Raman, and FTIR analysis showed the effects of graphene addition on main lattice of samarium oxide. Furthermore, the decrease of optical band gap due to graphene was also notable.
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