Efficient Removal of Organic Dyes from Water by Metal-Organic Frameworks: The Importance of Defects
کد مقاله : 1099-INZC6
ریحانه نجف زاده1، مسعود میرزائی شهرابی *2، مهدی نیکنام شاهرک3، روح اله خواجویان1
1گروه شیمی، دانشکده علوم، دانشگاه فردوسی
2استان خراسان رضوی، مشهد، دانشگاه فردوسی مشهد، دانشکده علوم، گروه شیمی
3دانشگاه صنعتی قوچان
چکیده مقاله:
Water contamination is currently one of the world’s major issues which has caused severe problems for human health and Earth’s ecosystems. Among various strategies proposed for water purification, adsorption has received the most attention; however, the ability to design a sorbent with high uptake capacity and selectivity for a single pollutant continues to elude researchers [1,2]. In the present work, we have chosen UiO-66 as a water-stable MOF in order to study the removal of pollutant dyes. The 12-coordinated zirconium-oxo clusters in this MOF in connection with1,4-benzenedicarboxylate linkers form a structure which possesses micropores of approximately 6 Å in diameter [3,4]. However, microporous system of UiO-66 hinders fast molecular diffusion and mass transfer of dye molecules. Thus, we utilized benzoic acid as modulating agent to expand the pore widths of UiO-66 to the mesoporous regime by creating defect sites. Primary results indicate that modulated-UiO-66 shows enhancement in the adsorption capacity in comparison with UiO-66.
کلیدواژه ها:
Metal-Organic Frameworks; Defect; Methyl Orange; Adsorption.
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