A multifunctional lanthanide metal–organic framework supported by Keggin type polyoxometalates

Abstract

A neodymium metal-organic framework with 1D nanotubular channels incorporating Keggin type [SiWWO38](3-) has been synthesized by utilizing pyridine-2,5-dicarboxylic acid as an organic ligand. It represents an unusual polyoxometalate-templated framework with the multifunctionality of magnetism, near-infrared luminescence and the selective adsorption of Rhodamine B dye molecules.

A Magnetic Adsorbent for the Removal of Cationic Dyes from Wastewater

“…Figure 12 indicates that the absorption peaks of anionic dye MO. The reason of the same adsorbent with different effects on removal of dyes is attributed to the electrostatic interactions between Fe 3 O 4 @1 and cationic dye molecules, which have been verified by the pseudo-second-order kinetic model [ 28 ]. Accordingly, Fe 3 O 4 @1 composite material is an adsorbent for cationic dyes in the dye-wastewater.…”

“…These results strongly demonstrate that the great adsorption performance of Fe 3 O 4 @1 . This is due to electron transfer and other chemical adsorption rather than simple adsorption of single molecules with the increase of MB concentration [ 28 ].…”