الفهرس 
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Abstract
Typical highly porous metal-organic frameworks (MOFs) materials that were based on Cr-BDC (MIL-101), Cu-BDC, and Cux-Cr100-x-BDC were prepared through one-pot solvothermal synthesis, and then Cr-MIL-101 was modified by loading appropriate ratio of sulfamic acid (SA) using simple impregnation technique. The prepared samples were characterized by XRD, TEM, SEM and FT-IR measurements. TEM and SEM measurements confirm that MIL-101 particles are preserved their octahedral structure after loading with different weight content of sulfamic acid, While Cu-BDC have a cubic structure and mixed MOFs have distorted morphology at high concentration of copper. The total number of acid sites and Brønsted to Lewis acid sites ratio (B/L) were examined using potentiometric titration and pyridine adsorption. The acid strength and surface acidity of SA/MIL-101 gradually increase after modification of Cr-MIL-101 by sulfamic acid crystals up to 55 wt.% then decrease again, while the acidity of mixed MOFs increases with increase copper content up to Cu90-Cr10-MOF due to synergetic effect. The catalytic performance of solid catalysts was confirmed in synthesis of 3,4-Dihydropyrimidin-2(1H)-Ones, 14-Phenyl-14H-dibenzo [a, j] xanthene and 7-hydroxy-4-methylcoumarin. The adsorption behaviors of the prepared samples for methyl orange (MO) as an anionic dye were studied, that are exceptionally suitable for the Langmuir adsorption isotherm. All loaded adsorbents showed high adsorption capacity for methyl orange at 25oC.