Amorphous mesoporous matrix from metal-organic framework UiO-66 template with strong nucleophile substitution
Journal
Chemosphere
Journal Volume
268
Date Issued
2021
Author(s)
Abstract
The metal-organic framework (MOF) UiO-66 is made of zirconium clusters coordinated with 1,4-benzenedicarboxylate linkers that is stable in water and is highly tolerant to extremely acidic or basic environments. Conversely, the zirconium clusters are affine to nucleophiles so the crystalline structures of UiO-66 can be converted into amorphous derivatives. In a mineral acid solution both protons and coordinating nucleophile are present. This study for the first time revealed that it is the strong nucleophile instead of proton deteriorate the crystalline structures of UiO-66. Also, the so-produced amorphous mesoporous matrix, if not totally dissolved, can be applied as an efficient adsorbent. The noted adsorption capabilities of Cu(II) and nucleophiles by these amorphous mesoporous matrix did not correlate with the structural crystallinity or the internal surface area; conversely, the doped nucleophiles were noted to contribute to the adsorption tendencies towards Cu(II) and phosphate species via electrostatic interactions and hydrogen bonding, respectively. Conversion of sacrificing UiO-66 template to amorphous matrix can be applied as an effective way to fabricate specific adsorbent with resistance to extreme pH and strong nucleophile challenges. ? 2020 Elsevier Ltd
Subjects
Crystallinity; Hydrogen bonds; Mesoporous materials; Metal-Organic Frameworks; Nucleophiles; Organometallics; Zirconium; Adsorption capability; Amorphous matrices; Crystalline structure; Internal surface area; Mesoporous matrix; Mineral acid; Phosphate species; Copper compounds; inorganic acid; metal organic framework; nucleophile; proton; zirconium; zirconium; adsorption; amorphous medium; chemical bonding; crystallinity; phosphate; porous medium; transformation; adsorption; aqueous solution; Article; comparative study; controlled study; crystal structure; hydrogen bond; industrial waste; molecular stability; nucleophilicity; porosity; precipitation; static electricity; substitution reaction; surface area; synthesis; waste water management; zeta potential; adsorption; water management; water pollutant; Adsorption; Metal-Organic Frameworks; Water Pollutants, Chemical; Water Purification; Zirconium
Type
journal article