Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 505, Issue -, Pages 178-185Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2017.05.040
Keywords
UiO-66-P composites; Nanocrystals; Organic dyes; Sorption property
Categories
Funding
- Shandong Provincial Natural Science Foundation, China [ZR2016BL02]
- Project of the Shandong Province Higher Educational Science and Technology Program [J16LC04]
- Natural Science Foundation of Linyi University [LYDX2016BS072]
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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 scantling 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 91.1 mg g(-1) was achieved at room temperature over 24 h when 5 mg of UiO-66-P was immersed in 40 mL of a 500 mg L-1 MB solution. This capacity is much higher than that of UiO-66 (24.5 mg g(-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. (C) 2017 Elsevier Inc. All rights reserved.
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