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Synthesis Of Nano Ni-Mo/γ-Al2O3 Catalyst

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Abstract

Nano γ-Al2O3 support was prepared by co-precipitation method by using different calcination temperatures (550, 600, and 750) oC. Then nano NiMo/γ-Al2O3 catalyst was prepared by impregnation method were nickel carbonate (source of Ni) and ammonium paramolybdate (source of Mo) on the best prepared nano γ-Al2O3 support at calcination temperature 550 oC. Make the characterizations for prepared nano γ-Al2O3 support at different temperatures and for nano NiMo/γ-Al2O3 catalyst like X-ray diffraction, X-ray fluorescent, AFM, SEM, BET surface area, and pore volume.The Ni and Mo percentages in the prepared nano NiMo/γ-Al2O3 catalyst determined by X-ray fluorescence were 2.924 wt % and 12.9 wt %, respectively. SEM of prepared nano γ-Al2O3 support at calcination temperature 550 oC. The average particles diameter of prepared γ-Al2O3 support determined by AFM at calcination temperatures 550, 600, and 750 oC and for prepared nano NiMo/γ-Al2O3 catalyst at calcination temperature 550 oC.


Article
Photocatlytic oxidation of congo red dye by using Co2O3–Cr2O3 as a Photocatalyst

Author: Alaa R. Amrin
Journal: Mesopotamia Environmental Journal بيئة وادي الرافدين ISSN: 24102598 Year: 2016 Volume: 2 Issue: 2 Pages: 66-74
Publisher: Babylon University جامعة بابل

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Abstract

Homogeneous crystalline chromium and cobalt oxides (Cr2O3- Co2O3) was prepared by co-precipitation method by mixing metals nitrate in the basic medium and the precipitate was calcinated at 700 C for 6 hrs. The crystalline structure of the synthesized products were analyzed by X-ray diffraction (XRD). The obtained XRD patterns of specimens revealed formation of a well-crystallized structure of double oxides after calcination at 700 C. The photocatalytic activity of double prepared oxides was investigated via following removal of congo red dye from the aqueous solution upon irradiation of reaction suspension under irradiation with UV light.


Article
Manufacturing and study the structural and electrical properties of the compounds Pb (Zr, Ti)O3 prepared in a manner Powders
تصنيع ودراسة الخواص التركيبية والكهربائية لمركبات Pb(Zr,Ti)O3 المحضرة بطريقة المساحيق

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Abstract

Was prepared lead Zrconat titanate compounds with the chemical formula Pb (Zr1-x Tix) O3 as (x = 0.5,0.48) and using technology the way powders were prepared Plasticizer models at a temperature (1000˚C) and for (6hr). physical tests of the models were conducted, where it was the study of the structural properties, in terms of X-ray diffraction measurements as results showed that all models were four-wheel installation (Tetragonal) with Miller transactions (001), (100), (110), (111), (002), (200), (210), (211), (220), (221), (103) and that the prevailing trend is (110) and the results of plasticity microwave very close sense of distance intra-convergent also relatively few crystalline defects. Increasing the bulk density of the true density of altered concentration of zirconium and titanium. Results of the examination microscope-mail also showed that the particle size (Dnm) be tight between the models and the homogeneity of the granules, as well as increasing the homogeneity of compositional structure, causing an improvement in the physical properties and A mechanical. shown technique results EDAX compound of the interacting elements of the composition and there is little difference between the real weight and the weight is noticeable. To study the electrical properties as included electrical properties study both the dielectric constant true of both types ('ε) and fantasy ("ε) as well as the loss of the separation (tanδ) and connectivity alternating (σac)

تم تحضير مركبات تيتانات زركونات الرصاص ذات الصيغة الكيميائية O3(Zr1-x Tix)Pb حيث أنّ (x=0.5,0.48) وذلك بإستخدام طريقة تكنلوجيا المساحيق حيث تم تلدين النماذج المحضرة عند درجة حرارة (1000˚C) ولمدة (6hr). أجريت الفحوصات الفيزياوية للنماذج, حيث تم دراسة الخواص التركيبية, بدلالة قياسات حيود الأشعة السينية إذ أظهرت نتائجها أنّ جميع النماذج كانت ذات تركيب رباعي(Tetragonal) ذات معاملات ميلر (001) , (100) , (110) , (111) , (002) , (200) , (210) , (211) , (220) , (221) , (103) وأن الإتجاه السائد هو (110) ونتائج المطاوعة الميكروية متقاربة جداً بمعنى المسافة البينية متقاربة أيضاً والتشوهات البلورية قليلة نسبياً . زيادة الكثافة الظاهرية عن الكثافة الحقيقية بإختلاف تركيز الزركونيوم والتيتانيوم . كما أظهرت نتائج فحص المجهر الألكتروني أنّ الحجم الحبيبي (Dnm) يكون متقارب بين النماذج وتجانس الحبيبات , وكذلك زيادة تجانس البنية التركيبية مسبباً تحسن في الخواص الفيزيائية والميكانيكية. أظهرت نتائج تقنية EDAX تكوين المركب من العناصر المتفاعلة وهناك فرق قليل بين الوزن الحقيقي والوزن الملاحظ . كما تمت دراسة الخواص الكهربائية إذ تضمنت الخواص الكهربائية دراسة كل من ثابت العزل بنوعيه الحقيقي ('ε) والخيالي("ε) وكذلك خسارة العازل (tanδ) والتوصيلية المتناوبة (acσ) .

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