حذف بسیار موثر کنگو قرمز با استفاده از نانوچندسازه MIL-101 (Fe) @PDopa@Fe3O4

نویسندگان

1 گروه فیزیک، دانشگاه یزد، یزد

2 گروه شیمی، دانشگاه آزاد اسلامی یزد، یزد

3 گروه شیمی، دانشگاه یزد، یزد

چکیده

جاذب پایدار مغناطیسی با عنوان MIL-101 (Fe) @PDopa@Fe3O4به منظور حذف رنگ کنگو قرمز از محیط آبی سنتز شد. یک فیلم نازک از 3,4-dihydroxy-L-phenylalanineبه عنوان یک اتصال دهنده کارآمد و دوست دار محیط زیست بین ذرات Fe3O4 وMIL-101 (Fe) استفاده شد. نانوچندسازه سنتز شده با استفاده از آنالیزهای SEM,TEM, FT-IR, XRDو TGAمورد بررسی قرار گرفت. ویژگی مغناطیسی چندسازه با استفاده از مغناطیسسنج نمونه برداری ارتعاشی ) (VSMمورد بررسی قرار گرفت. همچنین، برای تعیین بار سطحی نانوچندسازه آنالیز زتا پتانسیل انجام شد. عوامل تاثیر گذار مانند ، pHزمان تماس، مقدار جاذب، دما و غلظت اولیه رنگ برقابلیت جذب مورد بررسی قرار گرفت. ظرفیت جذب بالایی در حدود ۹0۹میلی گرم بر گرم برای کنگو قرمز به دست آمد. سینتیکهای جذب و مطالعات ایزوترم نشان داد که جذب کنگو قرمز از مدل همدما لانگمویر و مدل سینتیکی شبه مرتبه دوم پیروی میکند. همچنین، بررسیها نشان داد که MIL-101 (Fe) @PDopa@Fe3O4برای حذف کنگو قرمز قابل بازیافت است.

کلیدواژه‌ها


عنوان مقاله [English]

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

نویسندگان [English]

  • A. Hamedi 1
  • M. Borhani Zarandi 1
  • M.R. Nateghi 2
  • A.M. Haji Shabani Yazdi 3
1
2
3
چکیده [English]

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 3,4-dihydroxy-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.

کلیدواژه‌ها [English]

  • Metal organic framework
  • Congo red
  • Magnetic nanocomposite and adsorption capacity
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