Issue 44, 2024

Quasi-2D MIL-100 (Fe) synthesis via benzene-1,3,5-tricarboxylic acid self-assembly: organic dye adsorption at room temperature with dramatically enhanced kinetics

Abstract

Amid increasing environmental pollution, two-dimensional materials have played pivotal roles in environmental remediation. However, two-dimensional metal–organic frameworks (2D-MOFs) have yet to be thoroughly explored. This study introduces a novel approach to synthesize 2D-MOFs, particularly focusing on MIL-100-(Fe), for the adsorption of emerging organic dyes. By harnessing the self-assembly of benzene-1,3,5-tricarboxylic acid (BTC), we formed thin solid interfaces of BTC as building blocks to control the growth of MIL-100-(Fe). This resulted in quasi-2D structures that showed over a 35% increase in adsorption capacity and a 5.5-fold increase in the adsorption kinetics of Rhodamine B removal compared to their 3D counterparts. This new method overcomes traditional synthesis limitations, offering a replicable and high-yield procedure for 2D-MOF synthesis. Compared to its three-dimensional counterpart (3D MIL-100 Fe), the prepared adsorbent exhibited remarkably higher efficacy in the adsorption of Rhodamine B, with high structural stability and recyclability. The prepared adsorbent shows over 99% adsorption within 90 minutes for initial dye concentrations of 1–40 mg L−1via the Langmuir adsorption mechanism and pseudo-second-order kinetics. Our research pioneers a method for the synthesis of quasi 2D-MIL-100-(Fe), laying the groundwork for fabricating other 2D-MOF structures, particularly those based on carboxylic acids.

Graphical abstract: Quasi-2D MIL-100 (Fe) synthesis via benzene-1,3,5-tricarboxylic acid self-assembly: organic dye adsorption at room temperature with dramatically enhanced kinetics

Supplementary files

Article information

Article type
Paper
Submitted
10 Jul 2024
Accepted
11 Oct 2024
First published
15 Oct 2024

Nanoscale, 2024,16, 20738-20751

Quasi-2D MIL-100 (Fe) synthesis via benzene-1,3,5-tricarboxylic acid self-assembly: organic dye adsorption at room temperature with dramatically enhanced kinetics

G. Rabiee, A. Abbasi and M. Behbahani, Nanoscale, 2024, 16, 20738 DOI: 10.1039/D4NR02857K

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