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Register a new userEffect of different preparation methods on the properties of the textile structure of the common oxide group Al2O3 / CdO
تأثير طرائق التحضير المختلفة على خواص البنية النسيجية لجملة الأكسيد المشترك Al2O3/CdO
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Added by
Tishreen University ورقة بحثية
Publication date
2018
fields
Chemistry
and research's language is
العربية
Authors
حسام الدين قواص( باحث )
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Shamra Editor
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حضِرت عينات بطرائق مختلفة من الأكسيد المشترك Al2O3/CdO و بنسبة مولية واحدة محددة Al/Cd: 1-0.25 mol، بالطريقة الرطبة: الترسيب المشترك، و بالطرقة الجافة: - التفكك الحراري ﻟ نترات الألمنيوم Al(NO3)3.9H2O و نترات الكادميوم Cd(NO3)2.4H2O، - تفاعل نترات الألمنيوم Al(NO3)3.9H2O و نترات الكادميوم Cd(NO3)2.4H2O، مع NH4HCO3 بالنسب التفاعلية المناسبة، بدون عامل موجِه و مع عامل موجه، Sodium laureth Sulfate (ALS)، و تأثير طرائق التحضير المختلفة على خواص البنية النسيجية لجملة الأكسيد المشترك . تبيَن أن قيم عوامل البنية المسامية تختلف باختلاف طريقة التحضير. العينتان المحضرتان بطريقة التفكك الحراري. نلاحظ ازدياد حجم المسام الكلي بشكل طفيف في حين ينخفض نصف قطر المسام الوسطي من القيمة 2.71nm إلى 2.37nm، على عكس العينتين المحضرتين بالتسخين الهيدروحراري، إذ يزداد حجم المسام الكلي بشكل كبير ليصل إلى 0.553ml/g، و يكون تأثير إضافة العامل الموجه (SLS)، انخفاض في نصف قطر المسام الوسطي، و تزايد في قيمة المساحة السطحية النوعية.
Samples were prepared in different ways of Al2O3 / CdO and with one specific mole Al / Cd: 1-0.25 mol, in the wet joint deposition method. - The thermal disintegration of aluminum nitrate Al(NO3)3.9H2O and Cd(NO3)2.4H2O nitrate, and the reaction of aluminum nitrate Al(NO3)3.9H2O and cadmium nitrate Cd(NO3)2.4H2O, with NH4HCO3 with appropriate reactivity ratios, Sodium laureth sulfate (ALS), and the effect of various methods of preparation on the properties of the textile structure of the common oxide group Al O /CdO 2 3 . It was found that the values of porous structure factors vary according to the method of preparation, the two samples prepared in the manner of thermal disintegration. The total pore size is slightly increased, while the mean pore radius decreases from 2.71nm to 2.37nm, in contrast to the two hydrothermal heating samples. The total pore size increases significantly to 0.553ml /g. (SLS), a decrease in the radius of the middle pores, and an increase in the value of the surface area.
References used
LIPPENS, B.C.; STEGGERDA, J.J. Physical and chemical aspects of adsorbents and catalysts. Ed., B.G. Linsen, Acad. Press, London and New York, 1970, Ch. 4, 171-211
DDEWAELE, O; FROMENT,G,F. TAP Study of mechanism and kinetics of the adsorption and composition of methane on Ni/Al2O3 and NiO/Al2O3 . J, Catalysis Vol. 184, 1999, 499-513
ZHANG,X; LIU,J;JING, Y;XIE,Y. Support effects on the catalytic behavior of NiO/AL2O3 for oxidative dehydrogenation of Ethan to ethylene Appl Catalysis A ,2003, general 240. 143-150
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Tow samples of Al2O3/CdO mixed oxide were prepared by co-precipitation method at
PH 8 using concentrated ammonia as precipitated agent.The mixed system was prepared by
mixing aluminum chloride solution with cadmium chloride solution and aluminum ni
trate
solution with cadmium nitrate solution which prepared in previous work.
The nature of anions affected pore radii anions.
The results showed the increasing of micro porosity.
In this work, six different samples of the Al2O3 / CdO system were prepared in a
co-precipitation method. Samples were prepared from saturated solutions for cadmium and
aluminum salts using concentrated ammonia as a precipitating agent at pH = 8 an
d after
settling and drying the sample was calcined at 400°C for two hours.
In order to studied the surface acidity by temperature programmed desorption (TPD)
method. The calcined sample was divided to two parts: The TG-DTA measurements was
carried on for the first part in order to determine the loss weight using thermal program in
the range 20-900°C and 10°C/min. The second part was impregnated in pyridine for 24h,
and dried at 120°C to remove the physical adsorbed pyridine and the TG-DTA
measurements were performed at the same conditions for the first part.
Differential curves were studied to calculate the weight loss produced by the
desorption of pyridine. The AC8 (1-1) showed the highest surface acidity value
(0.47m.mol / g), while the sample AC8 (1-0.25) gave the lowest acidity surface value
(0.11m.mol / g).
The experience was carried out at Abi-Jarash farm, Faculty of Agriculture,
Damascus University during the 2012 - 2013 growing season. During plant
growth, three fertilization treatments were applied (mineral, T1 organic, T2
and a combined of miner
al and organic fertilizers, T3). At harvesting, roots
were packed in three different ways (box, perforated polyethylene bags and
non-perforated polyethylene bags) and stored in 4-5˚C and RH 90% for 94
days.
The ways cultivation of soils and preparing of soil are for farming
field crops with adding fertilizers village as one of the most important
methods of modern agriculture processes.
Starting up off this importance. the research was executed in the
north east area of Homs city, through the season(2013,2014) by
using five ways to cultiveate the soil.
The thin films of TiO2 were prepared by the Sol-Gel, on glass
subtracts by using the following initial solutions: trichlorethylene
titanium, ethanol, sodium hydroxide and hydrochloric acid and
distilled water. The films were annealed at temperatur
es(200- 300-
400-500)c° for 1 hour. The structure of the prepared and annealed
films were studied by XRD. The XRD rusltes showed that the films
prepared crystallize according to orthorhombic Structure.Lattice
constants were calculated and it was found that it was consistent
with the data JPCDS and with some scientific works.
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