نتایج جستجو برای: bjh
تعداد نتایج: 275 فیلتر نتایج به سال:
A series of metal modified dolomite catalysts (10%Ni-20%Cu/Dol, 10%Co-20%Cu/Dol, 10%Fe-20%Cu/Dol, 10%Zn-20%Cu/DolNi) were synthesized via method impregnation, later calcined at 500 ℃ and reduced by 5%H2 600 ℃. Those formerly tested for their physico-chemical properties BET, BJH, XRD, H2-TPR, NH3–TPD, CO2-TPD SEM, followed evaluation in catalytic performance glycerol hydrogenolysis to 1,2-propan...
Solution combustion was employed to create a series of ZrO2:Dy3+ (1-11 mol percent) nanoparticles (NPs) using oxalyl dihydrazide (ODH) as the fuel. NPs were subjected calcination at about 700°C. comprised 1 11 mol% Dy3+ characterized by employing X-ray diffraction (XRD), transmission electron microscopic (TEM), UV-visible, and photoelectron spectroscopic (XPS) techniques. The crystallite diamet...
Methylene blue (MB) is one of the toxic synthetic dyes that are being discharged heavily into water supplies. Hence, MB removal most important tasks for a cleaner supply. By using inexpensive, abundant, and easy-to-synthesize materials, superparamagnetic iron oxide nanoparticles, which were synthesized co-precipitation method with polyvinyl alcohol graphite (SPION/PVA/GR), can be used to adsorb...
In this research work, boron-doped titanium oxide (B-TiO2) was prepared by the sol-gel method to investigate its behavior in degradation of recalcitrant hormone estriol (E3). The doped photocatalyst synthesized at different boron/titania ratios 2, 3, and 5 wt.% boron with respect TiO2 content. obtained materials were characterized UV-Vis diffuse reflectance spectroscopy (DRS), X-ray diffraction...
In the present study, a type of graphitic mesoporous carbon (denoted as GMC) is synthesized and its structural properties were characterized by nitrogen physisorption isotherms, transmission electron microscopy and Raman spectroscopy. According to BET and BJH methods, the specific surface area (SBET) and the average pore diameter of GMC are estimated to be 720 m2/g and 3.4 nm, respectively....
Bi2Mn2O7 nano-powders were synthesized via a stoichiometric 1:1 Bi:Mn molar ratio hydrothermal method at 180 °C for 48 h in a 1M NaOH aqueous solution; and solid state method, using Bi(NO3)3.5H2O and MnO2 as raw materials. The synthesized materials were characterized by powder X-ray diffraction (PXRD) technique. Also, the rietveld analysis was done in FullProf in profile matching mode. It was f...
نانو ذرات TiO2 دوپه شده با +La3 با روش سل- ژل و با استفاده از مادههای اولیهی TiCl4 و La(NO3)3.6H2O سنتز شدند. شناسایی فراورده با استفاده از روشهای XRD ،XRF ،SEM ،EDX ،Uv-vis ،BET-BJH انجام شد. نتیجهها نشان میدهند که مادهی سنتزی حاوی 6 درصد یون +La3 بوده و حضور فازهای آناتاز و روتیل TiO2 در کنار La2O3 تأیید شد. شکاف انرژی این ماده eV 2/5، مساحت سطح ویژه آن2m/g 59/3 و متوسط قطر حفرات آن nm ...
In this article, the specific surface area (Ssol) and pore size distribution were determined by BET absorption at a low temperature of 77K. The purpose work is to determine level functionality modification meso-sized carbon tubes. According model, was calculated BJH model in material used. morphology mesoporous studied using transmission electron microscopy scanning microscopy. Differential cal...
This text reports the morphological and textural behavior of synthesis stages a CMK-3 carbon type using silicon matrix SBA-15 calcined at 823 K as template. During synthesis, three intermediate materials were obtained because (i) addition sucrose to template (CCMK3-1st), (ii) CCMK3-1st material (CCMK3-2nd), (iii) carbonization by pyrolysis by-product CCMK3-2nd (CCMK3-F). The texture above was f...
Nowadays, aquatic pollution is one of the most important global challenges, due to discharges a wide variety various hazardous materials from different activities which have significant environmental, economic and healthy impacts. Industries related organic dyes onsume large amounts water contribute significantly growing problem pollution. The current study describes conversion plant wastes int...
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