جستجوی مقالات مرتبط با کلیدواژه "mof-5" در نشریات گروه "پزشکی"

A group of supramolecular solid materials known as "metal organic frameworks"(MOFs) are a type of hybrid networks made up of a variety of inorganic and organic linkers that are all tightly bonded to metal ions. These classes of compounds have a larger surface area with the benefit of variable pore sizes, a diverse structure, and a lovely appearance. They are promising materials for a range of applications because they are easy to develop and have consistent, fine-tunable pore structures. Controlled mixing of MOFs with functional materials is resulting in the development of new multifunctional composites and hybrids that display unique properties that outperform those of their component parts as a whole. The structural characteristics, classification, The most widely used and successful strategies for MOFs composite synthesis are presented like (Encapsulation method, Solvothermal method, Solution impregnation, and Click chemistry (reaction) method), numerous characterization techniques and their applications MOFs composite have all been covered in this review. Crystals with extremely high porosity and good thermal and chemical stability can be produced by carefully choosing the MOF ingredients. Because of these properties, MOFs composites can be used for a wide range of applications, including, sensing toxic chemicals, drugs, gases, and trace metals, components of foods and many more and also for detection of different materials. This is a rapidly developing interdisciplinary research area therefore to present the current situation of the field; this article has covered recent achievements as well as new avenues to investigate the future scope and uses of MOFs composites/hybride.

Copper (Cu) is a very strong poison metal in the environment. Therefore, copper sorbent can be of great help to the medical field. Metal organic framework (MOF) has attracted considerable attention as sorbent because of high porosity and surface area. In this work, MOF-5 is one of zinc-based metal–organic framework was used for copper absorption from aqueous solution. Then, polyurethane (PU) nanocomposite was modified with MOF-5 by press method as copper sorbent.

The samples were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) analysis, field emission scanning electron microscope (FESEM), BET surface area, and Ultraviolet–visible (UV–Vis) spectroscopy. The effect of amount and concentration were investigated on adsorption of copper in water solution. Based on the results, MOF-5 and its polyurethane nanocomposite were demonstrated the potential utility for copper removal from water solution.

FESEM results confirmed that the samples are in nano scale. The copper absorption was approved by UV–Vis spectroscopy and BET surface area. The absorption value was increased by increase of amount and concentration.

This work focuses on preparing an efficient copper sorbent based on MOF-5 and its PU nanocomposite. MOF-5 is composed of zinc metal and benzene 1,4-dicarboxylic acid with the formula Zn4O(BDC)3 as good candidate for adsorption of copper from aqueous solution. The results indicate that this nanocomposite can have a good potential to develop environmental applications.

To investigate the adsorption property of H2 and CO2 on the organic ligand of C-MOF-5 (H2BDC) and T-MOF-5 (ZnO-doped H2BDC (ZnO-H2BDC)), Density functional theory (DFT) method was performed. First, the adsorption of ZnO on H2BDC resulted in examining binding energies, the charge transfer, density of states, dipole moments and adsorption geometries were investigated. The binding properties have been calculated and investigated theoretically for ZnO-doped H2BDC in terms of binding energies, band structures, Mulliken charges, and density of states (DOSs). According to obtained results, the H2BDC was strongly doped with ZnO. H2 and CO2 adsorption capacities for ZnO-doped H2BDC are significantly enhanced while there are low adsorption capacities for H2BDC. According to results, at least in the organic ligand of the MOF-5, the highest and lowest adsorption of CO2 (or H2) is attributed to the T-MOF-5 and C-MOF-5 respectively. Our calculations reveal that ZnO-doped H2BDC system (T-MOF-5) has much higher adsorption energy and higher net charge transfer value than pristine H2BDC (C-MOF-5). Also by changing in structure from cubic to tetragonal, the main site for H2 and CO2 adsorption was changed.