The fabrication of a nanoscale polyoxometalate based magnetic adsorbent and its selective adsorption on cationic dyes

K6P2W18O62 encapsulated into magnetic Fe3O4/MIL-101 (Cr) metal–organic framework: a novel magnetically recoverable nanoporous adsorbent for ultrafast treatment of aqueous organic pollutants solutions

“…Therefore, to resolve this problem and also to maintain the polyoxometalate, magnetic adsorbents have attracted our attention and magnetic MOFs have been used to anchor POMs to create hybrid heterogeneous materials. 21 MOFs are a new class of nanoporous materials consisting of metal ions or clusters coordinated to organic ligands, and they have attracted considerable attention in the adsorption and removal of organic pollutants due to their ultrahigh surface areas, ultrahigh porosity, and tunable pore size. 22–24 Among the thousands of MOFs that have been introduced so far, one of the most prominent materials is MIL-101 (Cr).…”

Polyoxometalate-Based Materials for the Removal of Contaminants from Wastewater: A Review

“…Recently, magnetic adsorbents have attracted intensive interest for wastewater treatment applications due to their ease of separation and collection using external magnetic field and their recyclability. For example, Zhang et al 55 18 The adsorption efficiencies of MB, GV, ST, and FB were 79, 91, 64, and 83%, respectively, and the adsorption of anionic dyes was insignificant, as previously demonstrated by other articles. The difference in adsorption efficiencies of cationic dyes were associated with the structure of the nanocomposites and dye molecules.…”

“…Vanadium-substituted POM-ILs have been designed by Mani et al using 1-butyl-3-methyl­imidazolium bromide, 1-octyl-3-methyl­imidazolium bromide, and 1-cetyl-3-methyl­imidazolium bromide with hexapotassium trivanado­phospho­tungstate. The most commonly used synthetic routes to fabricate water insoluble POMs as adsorbents in water treatment techniques are chemical precipitation, , sol–gel, ultrasonication-assisted, , microwave-irradiated, , hydrothermal or solvothermal, , and ionothermal. , …”

“…Recently, magnetic adsorbents have attracted intensive interest for wastewater treatment applications due to their ease of separation and collection using external magnetic field and their recyclability. For example, Zhang et al reported NH 2 -Fe 3 O 4 /CoW 12 magnetic adsorption for the removal of MB and investigated the selective separation ability between cationic MB and anionic MO molecules. Interestingly, the adsorption isotherm data followed Temkin model, and the variation of adsorption energy ( b T ) calculated for NH 2 -Fe 3 O 4 /CoW 12 composite was 35.28 J mol –1 , indicating exothermic adsorption of MB with maximum adsorption capacity of 175.5 mg g –1 .…”

Manipulation of magnetic nanoparticles by optically induced dielectrophoresis

“…In recent years, the magnetic nanoparticles [1][2][3] have been widely used in many areas due totheir advantages of good biocompatibility, hypotoxicity, easy functionalization, and super paramagnetism. The targeted gene therapy, biosensors [4], magnetic fever treatment [5][6] and drug delivery [7] are some of application examples.…”