A facile approach to fabricate an immobilized-phosphate zirconium-based metal-organic framework composite (UiO-66-P) and its activity in the adsorption and separation of organic dyes.

Author(s) Yang, J.M.
Journal J Colloid Interface Sci
Date Published 2017 Nov 01
Abstract

A novel immobilized-phosphate zirconium-based metal-organic framework composite, denoted as UiO-66-P, was synthesized by a solvothermal method using UiO-66 nanoparticles and Na3PO4 ligands. The products were characterized by powder X-ray diffraction, energy dispersive spectrometry, field emission scanning electron microscopy, thermogravimetric analysis, infrared spectroscopy, zeta potential analysis, and gas adsorption measurements. The UiO-66-P nanocrystals, which comprised negatively charged frameworks, exhibited high stability, excellent porosity, and efficient charge-selective capture and separation of the cationic dye Methylene Blue (MB). An uptake capacity of 91.1mgg(-1) was achieved at room temperature over 24h when 5mg of UiO-66-P was immersed in 40mL of a 500mgL(-1)MB solution. This capacity is much higher than that of UiO-66 (24.5mgg(-1)). The adsorption capability of UiO-66-P for MB was improved by 272% compared to that of pristine UiO-66. The effects of variables such as initial pH, MB concentration, and contact time were investigated. In addition, the as-obtained UiO-66 nanocrystals exhibited excellent adsorption capability for the anionic dyes Congo Red, Acid Chrome Blue K, and Methyl Orange.

DOI 10.1016/j.jcis.2017.05.040
ISSN 1095-7103
Citation Yang J-. A facile approach to fabricate an immobilized-phosphate zirconium-based metal-organic framework composite (UiO-66-P) and its activity in the adsorption and separation of organic dyes. J Colloid Interface Sci. 2017;505:178-185.

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