نتایج جستجو برای: magnetic heterogeneous nanocatalyst
تعداد نتایج: 462271 فیلتر نتایج به سال:
در این پروژه، نانو ذرات مخلوط اکسیدهای فلزی sio2-al2o3 با گروه آمینو پروپیل تری متوکسی سیلان اصلاح شدند. سپس نانو ذرات مخلوط فلزی اصلاح شده، با سه لیگاند بازشیف به وسیله ی تشکیل کمپلکس با کبالت استات، منگنز استات و فروسن کربوکسالدهید به سبب ساخت نانوکاتالیست های کبالت، آهن و منگنز عامل دار شد. نانوکاتالیست های سنتز شده با آنالیز عنصری (chn) ، icp-ms ، اسپکتروسکوپی ft-ir، uv-vis ds، bet ، eds ، ...
A highly efficient one-pot three-component protocol was devised for the synthesis of novel derivatives ((phenylethlidene)hydrazinyl)thiazol-4(5H)one by reaction acetophenone derivatives, ethyl chloroacetate and thiosemicarbazide, in ethanol at room temperature presence copper supported hydroxyapatite-encapsulated-γ-Fe2O3 (γ-Fe2O3@HAp@CPTMS@AT@Cu(ӀI)) as new magnetically recyclable heterogeneous...
In order to develop a functional ionic liquid catalyst with good stability and excellent catalytic effect on the organic reactions under alkaline conditions, magnetic nanocatalyst of tertiary amine incorporated Fe3O4 was prepared applied in Knoevenagel reaction, exhibits performance short reaction time yields products were obtained. addition, can be separated rapidly external force reused for 8...
Ni0.5Cu0.5Fe2O4 magnetic nanoparticles using Arabic gel (AG) as a reducing and stabilizing agent was prepared by the sol-method. The catalyst identification was performed using Fourier transform infrared spectroscopy (FT-IR), powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), and vibrating sample magnetometer (VSM). The magnetic anal...
Heterogeneous magnetic superconducting systems (HMSS) represent a new class of nanostructures. They are made of ferromagnetic (FM) and superconducting (SC) pieces separated by thin layers of insulating oxides. In contrast to the case of a homogeneous ferromagnetic superconductor studied during the last two decades, the two order parameters, the magnetization and the SC electron density do not s...
While precious metals are available to a very limited extent, there is an increasing demand to use them as catalyst. This is also true for palladium (Pd) catalysts and their sustainable recycling and production are required. Since Pd catalysts exist nowadays mostly under the form of nanoparticles, these particles need to be produced in an environment-friendly way. Biological synthesis of Pd nan...
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