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121.
Li Yicheng Moradi Iman Kalantar Mahdi Babadi Elmira Malekahmadi Omid Mosavi Amirhosein 《Journal of Thermal Analysis and Calorimetry》2021,144(6):2587-2603
Journal of Thermal Analysis and Calorimetry - Nanofluid refers to the mixture of fluid and solid nanoparticles. If this mixture contains more than one NP or fluid, it is called “hybrid... 相似文献
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Estellé Patrice Mahian Omid Maré Thierry Öztop Hakan F. 《Journal of Thermal Analysis and Calorimetry》2017,128(3):1765-1770
Journal of Thermal Analysis and Calorimetry - The present paper deals with the prediction of average Nusselt number in a differentially heated square cavity filled with Newtonian and non-Newtonian... 相似文献
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The increased global concern on environmental protection has made researchers focus their attention on new and more efficient methods of pollutant removal. In this research, novel nanocomposite adsorbents,i.e., magnetic hydroxyapatite (Fe3O4@HA) and magnetic hydroxyapatite β‐cyclodextrin (Fe3O4@HA‐CD) were synthesized and used for heavy metal removal. The adsorbents were characterized by FTIR, XRD, TGA, VSM, and SEM. In order to investigate the effect of β‐cyclodextrin (β‐CD) removal efficiency, adsorption results of nine metal ions were compared for both adsorbents. β‐CD showed the most increasing effect for Cd2+ and Cu2+ removal, so these two ions were selected for further studies. The effect of diverse parameters including pH, contact time, initial metal ion concentration and adsorbent dosage on the adsorption process was discussed. The optimum pH was 6 and adsorption equilibrium was achieved after 1 hr. Adsorption kinetic data were well fitted by pseudo‐second‐order model proposing that metal ions were adsorbed via chemical reaction. Adsorption isotherm was best described by the Langmuir model, and maximum adsorption capacity for Cd2+ and Cu2+ was 100.00 and 66.66 (mg/g), respectively. Desorption experiment was also done, and the most efficient eluent used for desorption of metal ions was EDTA (0.001 M) with 91% and 88% of Cd2+ and Cu2+ release, respectively. Recyclability studies also showed a 19% decrease in the adsorption capacity of the adsorbent after five cycles of regeneration. Therefore, the synthesized adsorbents were recognized as potential candidates for heavy metal adsorption applications. 相似文献
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Mina Shirzadi-Ahodashti Mohammad Ali Ebrahimzadeh Omid Amiri Ali Naghizadeh Sobhan Mortazavi-Derazkola 《应用有机金属化学》2020,34(4):e5467
The aim of this paper is to biosynthesize NiFe2O4/SiO2/Au (NiFe/Si/Au) magnetic nanocatalyst using the sonochemical method. This is the first study to synthesize this compound using this method. To obtain optimum morphology and size of products, the synthesis was performed in the presence of polyvinylpyrrolidone, maltose, glucose, and fructose as capping agents and Crataegus pentagyna leaf extract and NaBH4 as reducing agents. Vibrating-sample magnetometer, field-emission scanning electron microscopy, Fourier-transform infrared, transmission electron microscopy, X-ray diffraction, energy-dispersive X-ray spectroscopy, and differential reflectance spectroscopy techniques were performed to confirm the preparation of magnetic products. The as-synthesized magnetic samples were used to enhance the photocatalytic degradation and antibacterial activity. The NiFe/Si/Au nanocatalysts exhibited an excellent photocatalytic activity by degradation of rhodamine b, methylene blue, and erythrosine as organic contaminants under ultraviolet and visible light irradiation. The degradation curves illustrate that the degradation of anionic dyes is more than that of cationic dyes. In addition, antibacterial activity of as-prepared nanocatalyst against seven bacterial species was investigated. Because of their antibacterial effects, as-synthesized products show a high antibacterial activity against various bacteria. Consequently, the NiFe/Si/Au nanocatalysts with high antibacterial activity and excellent potential photocatalyst activity can be used in environmental and medical sciences for wastewater treatment. 相似文献
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Robust optimization with simulated annealing 总被引:1,自引:0,他引:1
Complex systems can be optimized to improve the performance with respect to desired functionalities. An optimized solution,
however, can become suboptimal or even infeasible, when errors in implementation or input data are encountered. We report
on a robust simulated annealing algorithm that does not require any knowledge of the problems structure. This is necessary
in many engineering applications where solutions are often not explicitly known and have to be obtained by numerical simulations.
While this nonconvex and global optimization method improves the performance as well as the robustness, it also warrants for
a global optimum which is robust against data and implementation uncertainties. We demonstrate it on a polynomial optimization
problem and on a high-dimensional and complex nanophotonic engineering problem and show significant improvements in efficiency
as well as in actual optimality. 相似文献
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Elahe Moazzen Nasser Daei Seyyedeh Mahdieh Hosseini Homeira Ebrahimzadeh Azam Monfared Mostafa M. Amini Omid Sadeghi 《Mikrochimica acta》2012,178(3-4):367-372
We have developed a technique for the solid-phase extraction of gold using various kinds of pyridine-functionalized nanoporous silica prior to its determination in various samples using FAAS. The effects of solution pH, sample and eluent flow rate, sample volume and of potentially interfering ions are compared. The limits of detections vary from 28 to 53?pg?mL?1. The accuracy and precision are between 99.8% and 98.3?% and 0.7 to 1.6?% (RSD), respectively. The method was successfully applied to several standard reference materials. Figure
A technique has been developed for the solid-phase extraction of gold using various kinds of pyridine-functionalized nanoporous silica prior to its determination in various samples using FAAS. 相似文献