Issue 23, 2024

A sulfonate ligand-defected Zr-based metal–organic framework for the enhanced selective removal of anionic dyes

Abstract

In this work, we introduce a novel defective analogue of the representative 6-connected zirconium-based metal–organic framework (MOF-808), by employing 5-sulfoisophthalic acid monosodium salt (H2BTC-SO3Na) as a defect inducer via a mixed-linker approach. The structural integrity and different physicochemical properties were investigated by various characterization techniques, including powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and nitrogen physisorption at 77 K. Additionally, proton nuclear magnetic resonance (1H-NMR), energy-dispersive X-ray (EDX), and inductively coupled plasma optical emission spectroscopy (ICP-OES) were employed to confirm the presence of 6.9 mol% of the 5-sulfoisophthalate ligand within the highly crystalline MOF-808 structure. The defective material exhibited significant enhancements in the removal efficiency of various organic dyes, including approximately 64% and 77% for quinoline yellow and sunset yellow, and 56% and 13% for rhodamine B and malachite green, compared to its pristine counterpart. Importantly, the defective MOF-808 showed a remarkable selectivity toward anionic species in binary-component dyes comprising both anionic and cationic dyes.

Graphical abstract: A sulfonate ligand-defected Zr-based metal–organic framework for the enhanced selective removal of anionic dyes

Supplementary files

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Article information

Article type
Paper
Submitted
15 Apr 2024
Accepted
15 May 2024
First published
21 May 2024
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2024,14, 16389-16399

A sulfonate ligand-defected Zr-based metal–organic framework for the enhanced selective removal of anionic dyes

H. V. Le, N. T. Vo, H. T. Phan, T. M. Dao, B. G. Nguyen, T. T. Nguyen, P. H. Ho and K. D. Nguyen, RSC Adv., 2024, 14, 16389 DOI: 10.1039/D4RA02803A

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