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Register a new userSynthesis of compound ZnCrO4 By Co-precipitation Method and studying it's crystalline structure
اصطناع المركب ZnCrO4 بطريقة الترسيب المشترك و دراسة بنيته البلورية
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تم في هذا البحث اصطناع مركب كرومات الزنك بطريقة الترسيب المشترك. و التأكد من تمام الاصطناع باستخدام انعراج الأشعة السينية و حددت درجة حرارة الاصطناع عند 250 ℃.
Zinc Chromate was synthesised by Co-precipitation method, The synthesised samples were characterized using X-ray powder diffraction technology (XRD). Set temperature synthesis at 250 ℃ .
References used
Wohlfarth E P, 1982- Ferromagnetic Materials. North- Holland, Amsterdam
Yu S H, Antoinetti M ,Colfen H ,Giersig M , 2002 -" Synthesis of Very Thin 1D and 2D CdWO4Nanoparticles with Improved Fluorescence Behavior by Polymer-Controlled Crystallization", Angew .Chem. Int, Ed. 41,PP 2356–2360
Liu B , Yu S H , Li L , Zhang Q , Zhang F , Jang K . 2004- "Morphology Control of Stolzite Microcrgstals With High Hierarchg in Slution",Angew. Chem. Int, Ed. 43,PP 4745 – 4750
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Our research aims to prepare ZnFe2O4 system by
CO-precipitation method in aqueous solution,starting from the
raw materials, and then studying its structure and properties .After
finishing the preparation period, we divided the precipitate in two
parts , and then we added to one of them the hydrogen peroxide and
then we dried every part alone, grind it and then we heated it at
various temperatures for two hours .
ZnCo2O4 spinel was successfully prepared via co-precipitation
process starting from corresponding metal chlorides in aqueous
solutions at pH=13. Different calcination temperatures (400-500-
600-700-800-1000oC) and different Zn:Co molar ratios (1:2
- 1:2.5) were applied in an effort to prepare this important spinel with perfect specifications starting from cheap, easy to handle inorganic precursors and using a simple process. This process was chosen for its simple requirements and the ability to modify the resulting spinel characteristics by adjusting different parameters easily like mixing temperature, time and speed and the drying conditions. The resulting samples were characterized using x-ray powder diffraction (XRPD), Fourier transform Infra-Red spectroscopy (FT-IR), Differential thermal analysis (DTA). The coloration, crystallinity size, formation and decomposition of the resulting ZnCo2O4 were found to depend on the calcination temperatures, Zn:Co molar ratio and stirring time. Results showed that ZnCo2O4 spinel was formed at relatively low temperatures. All the samples shared a cubic structure with Fd3m space group.
The radiating process of a crystalline sample cause damages in this sample .These damages composed mostly of displaced sample atoms from their regular position in lattice, and placed in irregular position, and of very less quantity from some beam par
ticles ( strange particles ) , that placed inside of this sample. The depth and amount of these damages are correlating with radiating parameters. It's possible to estimate the depth distribution profiles of damages by RBS-Method, but the sensitivity of this method is not enough to determine the depth distribution of concentration of beam particles , that placed inside of the sample . The placement depth of RBS-Profiles top is strongly correlated with orientation angle of a sample's channel relative to radiating beam also to kind of channel ,whereas the RBS-Profiles top displaces in depth , in channel radiation compare with its counter part in random radiation and the displacement value correlates with radiation parameters The height of RBS-Profiles top increase by increasing of radiation dose, and height that can't be survived called amorph state , and the agreeing dose called ,amorph dose , the amorph dose correlates also with radiation parameters, special sample temperature.
Two ethers coumarin derivatives: 7-phenoxy -4-carboxylic
coumarin (B) and 7- (6,2-di-chloro) -4-carboxylic coumarin (C)
have been synthesized from the 7-hydroxy-4-methy coumarin
(A) as beginning compound and the copper complex [CuPPh3Cl]4
carried on the amberlyst-21 as the eco-friendly catalyst, these ethers
coumarin derivatives have an important biological properties may
be used in the treatment of breast cancer.
قمنا في هذا البحث باصطناع كل من مركبي فرات الباريوم وفرات الزنك بلون بني محمر وذلك بطريقة الترسيب المشترك
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