نتایج جستجو برای: xrd fe sem
تعداد نتایج: 151724 فیلتر نتایج به سال:
in the present work, the znfe2o4 nanoparticle has been successfully synthesized. the obtained sample was characterized by x-ray diffraction (xrd), emission scanning electron microscopy (fe-sem) and its optical property was examined by uv-vis spectrophotometer. fe-sem revealed that the particle size of the znfe2o4 of about 47 nm was synthesized. the photocatalytic performance under uv-vis and vi...
در این تحقیق نانو ذرات ابررسانای ybco با استفاده از روش ترکیبی سل-ژل، احتراقی با اندازه متوسط 100 نانو مترساخته شدند و اثر تغییرph سل و تغییر دمای پخت بر تشکیل فاز ابررسانایybco و بر اندازه ذرات این ابررسانا مورد بررسی قرار گرفت. دو دسته نمونه از سل های با ph، 7 و 5 تهیه شد. دمای پخت 880 درجه سانتیگراد انتخاب و به مدت 5 ساعت در دمای مذکور حرارت دهی شدند. با استفاده از پراش اشعه x (xrd) و میکروس...
in this paper, plate-like nio nanoparticles were prepared by one-pot solid-state thermal decomposition of nickel (ii) schiff base complex as new precursor. first, the nickel (ii) schiff base precursor was prepared by solid-state grinding using nickel (ii) nitrate hexahydrate, ni(no3)2∙6h2o, and the schiff base ligand n,n′-bis-(salicylidene) benzene-1,4-diamine) for 30 min without using any solv...
the austenitic stainless steel (ss) has been used as a material for building ultra high vacuum (uhv) chamber. recently significant efforts have been concerned a comparing the standard cleaned for ultra high vacuum, passivity stainless. in this work austenitic nanocomposites were synthesize by sol- gel method. the morphologies and topographies of the samples have b...
the dried nitrate-urea gels exhibit the combination of autoicatatric combustion behavior and ultrasonic, whichcan be used to synthesize the nanocatalyst ferrite powders. cu and ni unites nanocatalyst powders sithcomposition of caned], and nife204 were synthesized by a sol-gel auto catalnic combustion process. themolar ratio between metal ions and urea was 11.2. the sob gel process was done at 8...
Effect of acidity and physical properties of nanozeolite catalyst on hydrocracking of vacuum gas oil
In this study, beta nanozeolite, ultra-stable Y zeolite (USY) and amorphous silica-alumina (ASA) were synthesized. These compounds were used as the support of hydrocracking catalyst. Ni-Mo/beta zeolite-ASA and Ni-Mo/USY zeolite-ASA catalysts were prepared by the impregnation method. The samples were characterized with X-Ray diffraction (XRD), field emission-scanning electron microscopy (FE-SEM)...
In this paper, we have reported convenient way to access CdTe nanorods by solvothermal decomposition using single source molecular precursor cadmium (II) bis-(isopropyl telluro) propane (SSMP) and quinoline as solvent at relatively low temperature (200oC).As synthesized nanomaterials are structurally characterized by XRD, SEM and UVVisible spectroscopy. SEM micrographs revealed formation of rod...
The Fe solubility test is a commonly used, easy and relatively cheap in vitro tool for predicting Fe bioavailability in food matrices. However, the outcome of a recent field trial comparing the effect on Fe status of Tanzanian infants of processed v. unprocessed complementary foods (CF), with otherwise the same composition, challenged the validity of this test for predicting Fe bioavailability....
This article reports on the preparation of iron nanoparticles (FeNPs) supported in chitosan beads (Chi-EDGE-Fe) for removing aldrin from aqueous solutions. The FeNPs and Chi-EDGE-Fe were characterized by means scanning electron microscopy (SEM), transmission (TEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR), Mössbauer spectroscopy (MS) techniques. TEM, XRD, MS showed that had co...
در این کار تحقیقاتی، لیگاند باز شیف 2- (( 4- متوکسی فنیل ایمینو) متیل) فنول با استفاده از پیش ماده های سالیسیل آلدهید و پارا متوکسی آنیلین تهیه شده است. این ترکیب یک لیگاند دودندانه ی no کئوردینه دهنده است. همچنین سنتز کمپلکس های روی و کادمیم با استفاده از لیگاند مذکور و نیترات روی و نیترات کادمیم در ابعاد توده مورد بررسی قرار گرفته است. لیگاند و کمپلکس ها توسط روش های ft-ir و uv-vis شناسایی و ...
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