CuBTC Metal–Organic Framework Decorated with FeBTC Nanoparticles with Enhance Water Stability for Environmental Remediation Applications

Abstract

Metal–organic frameworks (MOFs) based on Cu-benzene tricarboxylate (CuBTC) are widely used for gas storage and removal applications. However, they readily lose their crystal structures under humid conditions, limiting their practical applications. This structural decomposition reduces the specific surface area, gas adsorption capability, and recyclability of CuBTC considerably. In this study, a stable MOF against water exposure was designed based on FeBTC nanoparticle-covered CuBTC (FeCuBTC). A simple one-pot solvothermal process that enables the epitaxial growth of FeBTC on the CuBTC surface was proposed. Structural and morphological analyses after water exposure revealed that the water stability of FeCuBTC was better than that of CuBTC, which completely lost its crystallinity. This observed improvement in the water stability of the synthesized MOF proved to be beneficial for the adsorption of formaldehyde under humid conditions. The proposed strategy herein is simple yet highly effective in the design of hetero-bimetallic MOFs with considerably improved water resistance and extended applicability for environmental remediation processes.

Copper(ii)-MOFs for bio-applications

“…16 Today, it is known that characteristics such as the type of solvent, the salt source of the metal, the metal–ligand ratio, the capping agent and the addition of a base have an effect on the synthesis, and the size and morphology of the crystals obtained. 1,17,18 Therefore, from performing solvothermal syntheses that are typically carried out in DMF and high temperatures, 19 to green syntheses carried out in aqueous or methanolic media at room temperature, together with the aforementioned characteristics, allow the control of the morphology and size of the crystals. 20,21…”

“…25 While hydrothermal synthesis is one of the first methods carried out to obtain it, here the reaction of the metallic and organic precursors is carried out in water or another solvent, generally with a high boiling point and withstanding high temperatures and pressure, allowing the formation of copper-based MOFs in a hydrothermal environment. 19 Finally, some authors report synthesis from MOFs using precursors, and this is understood as a method where micro- or nanoprecursors are used as templates to form copper MOFs. 16…”

Palmitic acid-capped MIL-101-Al as a nano-adjuvant to amplify immune responses against Pseudomonas aeruginosa

“…24 However, MOFs have poor stability in aqueous media, particularly under physiological conditions, primarily because of the presence of uncoordinated ligands and unsaturated coordination sites, as well as their strongly positively charged, which may sharpen their lymph-node-targeting efficiency. 25,26 Here, we report the synthesis of MIL-101-Al (MIL), constructed from 2-aminoterephthalic acid and aluminum chloride hexahydrate. The positive zeta potential of MIL allowed for the successful loading of lysates of PAO1 and the adjuvant CpG through electrostatic adsorption to obtain MIL-BL-CpG.…”

“…24 However, MOFs have poor stability in aqueous media, particularly under physiological conditions, primarily because of the presence of uncoordinated ligands and unsaturated coordination sites, as well as their strongly positively charged, which may sharpen their lymph-node-targeting efficiency. 25,26…”

Impact of copper and cobalt-based metal-organic framework materials on the performance and stability of hole-transfer layer (HTL)-free perovskite solar cells and carbon-based

“…Furthermore, Cu-BTC’s high porosity and surface area facilitate enhanced light absorption and provide ample sites for effective charge transfer, which are vital for the improved performance of PSCs 19 . The good pore volume and regeneration ability of Cu-BTC also contribute to its suitability as an interlayer in PSCs, promoting better crystallinity and reducing residual PbI 2 in the perovskite film 20 . On the other hand, CoBTC is distinguished by its electrocatalytic properties, which are beneficial for the charge extraction process in PSCs 21 .…”