China
Africa
Explore chapters and articles related to this topic
Recent Developments in MOF-Polymer Composites
Published in Ram K. Gupta, Tahir Rasheed, Tuan Anh Nguyen, Muhammad Bilal, Metal-Organic Frameworks-Based Hybrid Materials for Environmental Sensing and Monitoring, 2022
With the growth of population and industrial development, the problem of environmental pollution has also grown. There are numerous types of water and air pollutants including heavy metals, organic dyes, and noxious gases, which are harmful to human health. In this context, numerous materials with extraordinary features have been developed for environmental monitoring and sensing. These include metals, metal oxides, semiconducting materials, carbon-based materials, and polymers. The past few decades have witnessed a growth in the study of various metal-organic frameworks (MOFs) as sensing materials for environmental remediation. MOFs consist of inorganic metal nodes (called secondary building units (SBUs)) and organic linkers connected to form three-dimensional porous material. The first reported MOF structure was Zn-based MOF-5 having a huge specific surface area of 2900 m2/g and 60% porosity [1]. Afterward, MOFs based on appropriate combinations of metal ions and organic ligands were developed and they possessed improved structural, electrical, optical, and catalytic properties. MOFs display various exceptional features such as the availability of huge surface area, the ability to modify pore size, and the presence of a large number of active sites, which leads to diverse applications. The porosity, exceptional storage, and high catalytic properties of MOFs are utilized in gas separation, catalysis, energy storage, production devices, and so forth.
Introduction
Published in Shitanshu Sapre, Kapil Pareek, Rupesh Rohan, Compressed Hydrogen in Fuel Cell Vehicles, 2022
Shitanshu Sapre, Kapil Pareek, Rupesh Rohan
MOFs are a class of inorganic–organic hybrid porous crystalline materials consisting of metal ions. MOFs have several properties that make them particularly attractive for hydrogen storage such as their extraordinarily high surface areas, ultrahigh porosities, and modifiable internal surfaces. MOF has gained attention for research by many researchers as they have good stability, large surface area, and adjustable pore size [39]. The first MOF, MOF-5 was synthesized in 1999 by the group of Omar Yaghi and his collaborators from the University of California at Los Angeles. This MOF which is inexpensive to manufacture, lightweight and stable, is already able to store a quantity of hydrogen up to 4.5% by weight at 77 K and 0.7 bar [40].
A review on state of art and perspectives of Metal-Organic frameworks (MOFs) in the fight against coronavirus SARS-CoV-2
Published in Journal of Coordination Chemistry, 2021
An example of a possible virus detection material is MOF-5 [34]. MOF-5 is zinc terephthalate oxide with the chemical composition [Zn4O(BDC)3]·G (BDC = benzene-1,4-dicarboxylate, terephthalate; G = guest molecules) in which four zinc(II) ions share one oxide ion. In addition, Zn(II) ions are bridged by six carboxylates from BDC molecules coordinated in the syn-syn mode that are oriented into the corners of the octahedron (see Figure 3a). Mentioned coordination creates an electroneutral Zn4(O)(COO)6 cluster with octahedral secondary building unit (SBU, see Figure 3b), which is bridged by BDC molecules to form a cubic framework containing pores with a size of 8 × 8 Å propagating along all crystallographic axes (see Figure 3c). Depending on the preparation method and activation conditions, the specific surface area of MOF-5 ranged from 2,000 to 3,800 m2·g−1 [36,37].
Molybdenum-99 from Molten Salt Reactor as a Source of Technetium-99m for Nuclear Medicine: Past, Current, and Future of Molybdenum-99
Published in Nuclear Technology, 2023
Jisue Moon, Kristian Myhre, Hunter Andrews, Joanna McFarlane
Interestingly, MoF5, MoF4, and MoF3 can be formed by controlling the temperature and vacuum, starting with the reaction between MoF6 with molybdenum metal. When excess MoF6 is refluxed over Mo metal in the temperature range of 25°C to 75°C until it is consumed, a yellow solution of MoF5 dissolves in the excess MoF6: