Issue 12, 2023

Efficiently improving the adsorption capacity of the Rhodamine B dye in a SO3H-functionalized chromium-based metal–organic framework

Abstract

A metal–organic framework containing metal sites of chromium, termed BUT-8(Cr), was successfully fabricated via a solvothermal procedure, which is capable of excellent uptake of the Rhodamine B (RhB) dye from the solution. The removal of the RhB dye using BUT-8(Cr) was studied in terms of solution pH, material content, adsorption isotherms, and kinetics to identify the most favorable conditions. Accordingly, the maximum adsorption capacity of 811.7 mg g−1 is well-fitted by the Langmuir isotherm model, which is much higher than those of previously reported MOF materials. Furthermore, the kinetic data for the RhB adsorption fit with the pseudo-second order model. This indicates that RhB uptake is a chemical process. The recycling test result shows that an efficiency of 94.5% is retained over seven recycles. The comparison of the results of FT-IR and Raman spectroscopy, and PXRD, and TGA-DSC analyses of RhB⊂BUT-8(Cr) reveals the presence of electrostatic and π–π interactions between the RhB+ ions and negatively charged SO3 moieties within the MOF architecture, leading to RhB removal with an ultra-high adsorption capacity. These findings show that the sulfonic-functionalized Cr-based MOF could be a promising candidate for removing organic dyes in a real polluted environment.

Graphical abstract: Efficiently improving the adsorption capacity of the Rhodamine B dye in a SO3H-functionalized chromium-based metal–organic framework

Supplementary files

Article information

Article type
Paper
Submitted
15 Mar 2023
Accepted
16 May 2023
First published
01 Jun 2023
This article is Open Access
Creative Commons BY-NC license

Mater. Adv., 2023,4, 2636-2647

Efficiently improving the adsorption capacity of the Rhodamine B dye in a SO3H-functionalized chromium-based metal–organic framework

K. M. V. Nguyen, A. V. N. Phan, N. T. Dang, T. Q. Tran, H. K. Duong, H. N. Nguyen and M. V. Nguyen, Mater. Adv., 2023, 4, 2636 DOI: 10.1039/D3MA00123G

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