A Novel Aluminum‐Based Metal‐Organic Framework with Uniform Micropores for Trace BTEX Adsorption

Abstract

Metal-organic frameworks (MOFs) are potential porous adsorbents for benzene, toluene, ethylbenzene and xylene (BTEX). A novel MOF, using low toxic aluminum (Al) as the metal, named as ZJU-620(Al), with uniform micropore size of 8.37 � 0.73 Å and specific surface area of 1347 m 2 g À 1 , was synthesized. It is constructed by one-dimensional rod-shaped AlO 6 clusters, formate ligands and 4,4',4''-(2,4,6-trimethylbenzene-1,3,5-triyl) tribenzoic ligands. ZJU-620(Al) exhibits excellent chemical-thermal stability and adsorption for trace BTEX, e.g., benzene adsorption of 3.80 mmol g À 1 at P/P 0 = 0.01 and 298 K, which is the largest one reported. Using Grand Canonical Monte Carlo simulations and Single-crystal X-ray diffraction analyses, it was observed that the excellent adsorption could be attributed to the high affinity of BTEX molecules in ZJU-620(Al) micropores because the kinetic diameters of BTEX are close up to the pore size of ZJU-620(Al).

Methyl-Functionalized Al-Based MOF ZJU-620(Al): A Potential Physisorbent for Carbon Dioxide Capture

“…It was synthesized according to our previous work. 24 In detail, H 3 TMTA (11.00 mg, 0.023 mmol), Al(NO 3 ) 3 •9H 2 O (12.80 mg, 0.034 mmol), and 0.40 mL of formic acid were mixed in 1.30 mL of DMF. This mixture was put into a 50 mL Teflon vessel and heated up to 130 °C for 72 h. After cooling to room temperature, the white crystalline products were obtained, washed with DMF and acetone for three times, and dried in the oven for 24 h at 80 °C.…”

“…The morphology of ZJU-620(Al) was rod-shaped (Figure S3a), using scanning electron micrographs instruction (SEM) technology, in agreement with pervious reported. 24 The Al, C, and O elements of ZJU-620(Al) were uniformly distributed from energy dispersive spectroscope (EDS) linear scans (Figure S3b) and EDS mapping images (Figure S3c). Transmission electron microscope (TEM) images were tested at 80 kV, using JEM-1400 flash.…”

“…21,22 Moreover, the methyl group of ligands can not only enhance the strength of Al−O coordinated bonds by increasing the electron density of O atoms of ligands 21,22 but also reduce the water adsorption due to its hydrophobicity. 23 Therefore, methyl-functional Al-based MOFs can be the potential candidates for the application of CO chemical-thermal stability and abundant microporous structure, synthesized in our previous study, 24 is employed to investigate the CO 2 capture performance and recyclability, selectivity of CO 2 /N 2 , and moisture-resistance ability. O, 99%), acetic acid (99%), and formic acid (99%) were purchased from Aladdin Reagent Co., Ltd., China.…”

A solvent-responsive terbium-organic framework for photocatalytic CO2reduction

“…Stimuli-responsive MOFs are novel porous materials that combine the advantages of inorganic and organic chemistry. MOFs have unique structures that can respond to changes in solvent, [33][34][35][36] temperature, [37][38][39][40] pH, [41][42][43] light, [44][45][46] chemical substances, [47][48][49] and thus, they have become an excellent choice for creating stimuli-responsive materials. This article utilizes 2′,5′-diethoxy-[1,1′:4′,1″-terphenyl]-4,4″dicarboxylic acid (DTDA) and TbCl 3 •6H 2 O to construct a solvent-responsive MOF with rod secondary building units (SBUs), {[Tb(DTDA) 1.5 •2H 2 O]•DMF•8H 2 O} n (AQNU-4).…”

“…Stimuli-responsive MOFs are novel porous materials that combine the advantages of inorganic and organic chemistry. MOFs have unique structures that can respond to changes in solvent, 33–36 temperature, 37–40 pH, 41–43 light, 44–46 chemical substances, 47–49 and thus, they have become an excellent choice for creating stimuli-responsive materials.…”