In Situ Synthesis of Hierarchical Porous Zr-MOFs on Columnar Activated Carbon and Application in Toxic Gas Adsorption

Abstract

Metal organic frameworks (MOFs) have been explored as adsorption materials owing to their diversity, controllable structure, high specific surface area, and abundant active sites. However, the shaping of MOFs has become a critical issue hindering their commercial application. A binder or high pressure is commonly used in traditional powder shaping, causing pores to be blocked or collapsed and porosity to be decreased, eventually leading to the degradation of adsorption performance. In this paper, Zr-MOFs were in situ grown on a columnar activated carbon (CAC) matrix, and a series of Zr-MOFs/CAC composites were prepared. The adsorption properties for SO2 and NO2 were measured by dynamic adsorption tests, and the Wheel–Jonas model was used to calculate the saturated adsorption capacity. Abundant mesopores can be formed between MOF crystals and activated carbon particles, and the mesoporosity of Zr-MOFs/CAC composites reached over 50%. Owing to the abundant mesoporous, increased activated sites as well as the synergistic effect between MOFs and activated carbon, the as-obtained HP-Zr-MOFs/CAC exhibited the best adsorption performance both for SO2 and NO2, which are 34.2 and 17.4 mg g–1, respectively, while the adsorption capacities of CAC for SO2 and NO2 are 20.9 and 6.6 mg g–1, respectively. The outstanding performance and facile synthesis process of HP-Zr-MOFs/CAC composites could provide ideas to develop other hierarchical porous MOFs/activated carbon composites.

Labile silver(I) complexes with benzisothiazolinone anion and phosphines: Synthesis, characterization and hydrogen storage application

“…[6][7][8][9] In this context, coordination compounds have emerged as promising candidates for hydrogen storage due to their diverse structures and tunable properties. [10][11][12][13][14][15][16][17][18][19] The ability of coordination compounds to adsorb and release hydrogen molecules is influenced by various factors, including the choice of metal centers, ligand design, and coordination modes. By leveraging the unique features of coordination chemistry, such as metal-ligand interactions and the formation of porous structures, researchers have made significant strides in designing coordination compounds with enhanced hydrogen storage capacities.…”

Porous MOF Featuring 2D Intersecting Channels Based on a Pentanuclear Mn5(COO)10CO3 Cluster with Upgrading of Pipeline Natural Gas

“…Many solid adsorbent-based separation techniques are increasingly favored by researchers, such as porous activated carbons, 24 zeolites, 25 and molecular sieves. 26 Different from conventional porous solids with a poor customized pore environment and gas selectivity, metal−organic frameworks (MOFs) have become a promising candidate for the separation of NG due to their high porosities, large specific surface areas, adjustable pore structures, and accessible pore surfaces.…”

“…Many solid adsorbent-based separation techniques are increasingly favored by researchers, such as porous activated carbons, zeolites, and molecular sieves . Different from conventional porous solids with a poor customized pore environment and gas selectivity, metal–organic frameworks (MOFs) have become a promising candidate for the separation of NG due to their high porosities, large specific surface areas, adjustable pore structures, and accessible pore surfaces. – The greatest advantage of MOFs over other solid adsorbents is the ability to modulate the pore environment at the atomic level to enhance their interaction with specific gases, – thus enabling the separation and purification of specific gases.…”