Highly efficient removal of Congo red by MIL-101 (Fe) @PDopa@Fe3O4

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Hamedi Asma; BORHANI ZARANDI MAHMOOD; NATEGHI MOHAMMAD REZA; Haji Shabani Yazdi Ali Mohammad

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Journal: NANOSCALE Year:2020 | Volume:7 | Issue:1 Page(s): 13-24

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Title

Highly efficient removal of Congo red by MIL-101 (Fe) @PDopa@Fe3O4

Author(s)

Hamedi Asma | BORHANI ZARANDI MAHMOOD | NATEGHI MOHAMMAD REZA | Haji Shabani Yazdi Ali Mohammad | Issue Writer Certificate

Keywords

Metal organic frameworkQ1

Congo redQ1

Magnetic nanocomposite and adsorption capacityQ1

Abstract

A magnetic metal-organic framework (MOF) composite, MIL-101(Fe) @PDopa@Fe3O4, was synthesized as the stable adsorbent for removal of Congo red (CR) from water. That very thin film of 3, 4dihydroxy-L-phenylalanine (L-Dopa) was used as an efficient and environmentally friendly binder between Fe3O4 nanoparticles and MIL-101(Fe). The synthesized nanocomposite was investigated by SEM, TEM, FT-IR, XRD and TGA analyzes. Magnetic properties of the composite were studied by vibrating sample magnetometer (VSM). Zeta potential analysis was also performed to determine the surface charge of the nanocomposite. Influencing factors such as pH, contact time, adsorbent dosage, temperature, and initial dye concentration on the adsorption ability of the MIL-101(Fe) @PDopa@Fe3O4 were investigated. The very excellent adsorption capacity about 909 mg/g for CR was achieved. Adsorption kinetics and isotherms studies indicated that CR adsorption followed Langmuir isotherm model and pseudo second-order kinetic model. Studies have also shown that The MIL-101(Fe) @ PDopa@Fe3O4 was found to be recyclable for removal of CR.

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