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19 pages, 4423 KiB

Open AccessArticle

Selective Adsorption of Aqueous Diclofenac Sodium, Naproxen Sodium, and Ibuprofen Using a Stable Fe₃O₄–FeBTC Metal–Organic Framework

by Aldo Arturo Castañeda Ramírez, Elizabeth Rojas García, Ricardo López Medina, José L. Contreras Larios, Raúl Suárez Parra and Ana Marisela Maubert Franco

Materials 2021, 14(9), 2293; https://doi.org/10.3390/ma14092293 - 28 Apr 2021

Cited by 24 | Viewed by 3485

Abstract

The FeBTC metal–organic framework (MOF) incorporated with magnetite is proposed as a novel material to solve water contamination with last generation pollutants. The material was synthesized by in situ solvothermal methods, and Fe₃O₄ nanoparticles were added during FeBTC MOF synthesis [...] Read more.

The FeBTC metal–organic framework (MOF) incorporated with magnetite is proposed as a novel material to solve water contamination with last generation pollutants. The material was synthesized by in situ solvothermal methods, and Fe₃O₄ nanoparticles were added during FeBTC MOF synthesis and used in drug adsorption. X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and Raman spectroscopy characterized the materials, with N₂-physisorption at 77 K. Pseudo-second-order kinetic and Freundlich models were used to describe the adsorption process. The thermodynamic study revealed that the adsorption of three drugs was a feasible, spontaneous exothermic process. The incorporation of magnetite nanoparticles in the FeBTC increased the adsorption capacity of pristine FeBTC. The Fe₃O₄–FeBTC material showed a maximum adsorption capacity for diclofenac sodium (DCF), then by ibuprofen (IB), and to a lesser extent by naproxen sodium (NS). Additionally, hybridization of the FeBTC with magnetite nanoparticles reinforced the most vulnerable part of the MOF, increasing the stability of its thermal and aqueous media. The electrostatic interaction, H-bonding, and interactions in the open-metal sites played vital roles in the drug adsorption. The sites’ competition in the multicomponent mixture’s adsorption showed selective adsorption (DCF) and (NS). This work shows how superficial modification with a low-surface-area MOF can achieve significant adsorption results in water pollutants. Full article

(This article belongs to the Special Issue Covalent Organic Frameworks (COFs) and Metals Organic Frameworks (MOFs): Design and Applications)

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17 pages, 5468 KiB

Open AccessArticle

Performance of MIL-101(Cr)/Water Working Pair Adsorption Refrigeration System Based on a New Type of Adsorbent Filling Method

by Zhongbao Liu, Banghua Zhao, Longqian Zhu, Fengfei Lou and Jiawen Yan

Materials 2020, 13(1), 195; https://doi.org/10.3390/ma13010195 - 02 Jan 2020

Cited by 17 | Viewed by 3199

Abstract

MIL-101(Cr) and water were applied to adsorption refrigeration technology. MIL-101(Cr) was prepared by hydrothermal synthesis method and characterized by X-ray diffraction patterns (XRD), Fourier transform infrared spectroscopy (FTIR), N₂ adsorption–desorption measurement at 77 K, thermal gravimetric analysis (TGA) and scanning electron microscope [...] Read more.

MIL-101(Cr) and water were applied to adsorption refrigeration technology. MIL-101(Cr) was prepared by hydrothermal synthesis method and characterized by X-ray diffraction patterns (XRD), Fourier transform infrared spectroscopy (FTIR), N₂ adsorption–desorption measurement at 77 K, thermal gravimetric analysis (TGA) and scanning electron microscope (SEM). The adsorption isotherms of water vapor on MIL-101(Cr) were investigated by using a gravimetric water sorption analyzer. This study established the basic adsorption cycle mathematical model and used MATLAB/Simulink for the simulation. The control variable method was used to simulate the effect on the cooling capacity and coefficient of performance (COP) when the desorption temperature changed. When the adsorption temperature was 35 °C, the evaporation temperatures were 15 °C and 20 °C, and the amount of water vapor equilibrium adsorption on MIL-101 (Cr), Cooling power per unit adsorbent mass (SCP), and COP were measured by using the adsorption performance test rig on the basis of a new type of powder adsorbent filling method. Full article

(This article belongs to the Special Issue Covalent Organic Frameworks (COFs) and Metals Organic Frameworks (MOFs): Design and Applications)

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Review

Jump to: Research

16 pages, 2960 KiB

Open AccessReview

Metal-Organic Framework (MOF)/Epoxy Coatings: A Review

by Farzad Seidi, Maryam Jouyandeh, Mohsen Taghizadeh, Ali Taghizadeh, Henri Vahabi, Sajjad Habibzadeh, Krzysztof Formela and Mohammad Reza Saeb

Materials 2020, 13(12), 2881; https://doi.org/10.3390/ma13122881 - 26 Jun 2020

Cited by 105 | Viewed by 13609

Abstract

Epoxy coatings are developing fast in order to meet the requirements of advanced materials and systems. Progress in nanomaterial science and technology has opened a new era of engineering for tailoring the bulk and surface properties of organic coatings, e.g., adhesion to the [...] Read more.

Epoxy coatings are developing fast in order to meet the requirements of advanced materials and systems. Progress in nanomaterial science and technology has opened a new era of engineering for tailoring the bulk and surface properties of organic coatings, e.g., adhesion to the substrate, anti-corrosion, mechanical, flame-retardant, and self-healing characteristics. Metal-organic frameworks (MOFs), a subclass of coordinative polymers with porous microstructures, have been widely synthesized in recent years and applied in gas and energy storage, separation, sensing, environmental science and technology, and medicine. Nevertheless, less attention has been paid to their performance in coatings. Well-known as micro- and nanoporous materials, with a tailorable structure consisting of metal ions and organic linkers, MOFs have a huge loading capacity, which is essential for the delivery of corrosion inhibitors. This review paper attempts to highlight the importance of epoxy/MOF composites for coating applications. A particular emphasis was explicitly placed on the anti-corrosion, flame-retardant, mechanical, and dielectric properties of epoxy/MOF coatings. Full article

(This article belongs to the Special Issue Covalent Organic Frameworks (COFs) and Metals Organic Frameworks (MOFs): Design and Applications)

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