Zeolitic Imidazolate Framework-8 Nanoparticles for Rhodamine B Adsorption

Author(s): Diogo P. Al Rodrigues, Meiry G.F. Rodrigues*, Patrícia F. Tomaz, Tellys L.A. Barbosa

Journal Name: Current Nanomaterials

Volume 6 , Issue 1 , 2021


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Abstract:

Background: Dye removal from effluents is one of the major problems faced in the world. It is a very important environmental issue and it is crucial to solve this problem. In this sense, ZIFs are increasingly becoming important in the environmental area.

Objective: This work presents the synthesis of metalorganic framework Zeolitic Imidazolate Framework- 8 (ZIF-8) nanoparticles, characterization, and then determines the potential to remove Rhodamine B (RhB) from an aqueous solution.

Methods: ZIF-8 was synthesized under solvothermal treatment at 25°C and it was characterized by X-ray diffraction, N2 adsorption-desorption, scanning electron microscopy, and infrared spectroscopy. To evaluate the capacity of the RhB, pH-influence and kinetic studies were carried out. The pseudo first- and second-order kinetic models were used to describe the kinetic data, and the rate constants were evaluated.

Results: ZIF-8 had an average particle size of 47 ± 4.6 nm. The removal percentage increased significantly when the pH was in the range of 7.0-9.0. A pseudo-second-order kinetic of 13.00 mg/g was found for the RhB removal. The adsorption capacity at equilibrium was found to be 11.8 mg/g.

Conclusion: According to the characterization results, the ZIF-8 synthesis was effective and produced a crystalline material. The ZIF-8 presented an affinity to the RhB dye. A pseudo-second- order kinetic model represented well the mechanism of interaction involved during RhB adsorption and ZIF-8.

Keywords: Zeolitic imidazolate framework-8, nanoparticles, solvothermal synthesis, dye removal, Rhodamine B, adsorption, waste water.

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Article Details

VOLUME: 6
ISSUE: 1
Year: 2021
Published on: 24 February, 2021
Page: [66 - 73]
Pages: 8
DOI: 10.2174/2468187310999201120091142
Price: $65

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