Facile synthesis and characterization of Fe₃O₄@MgAl-LDH@STPOM nanocomposites for highly enhanced and selective degradation of methylene blue

Abstract

A novel layered and cauliflower-like Fe3O4@MgAl-LDH@Ce3W18 nanocomposite has been synthesized by the selective ion-exchange method.

Recovery of Palladium and Gold from PGM Ore and Concentrate Leachates Using Fe3O4@SiO2@Mg-Al-LDH Nanocomposite

“…Figure 1D, show diffractions patterns of the nanocomposite. As seen in this Figure nanocomposite assemblies exhibit characteristic diffraction peaks of Mg-Al-LDH and Fe3O4@SiO2 [34,37,41,42]. The incorporation of magnetic nanoparticles reduced the intensity of the peaks of the LDH.…”

“…The supernatant containing the recovered analytes were separated via magnetic decantation and the liquid was filtered and analysed using ICP-OES. [34,37,41,42]. The incorporation of magnetic nanoparticles reduced the intensity of the peaks of the LDH.…”

Sandwich type polyoxometalates encapsulated into the mesoporous material: synthesis, characterization and catalytic application in the selective oxidation of sulfides

“…The new bands at 1093, 956, 891, 792 cm −1 or 1062, 1018, 948, 784 cm −1 (shown with dashed lines) observed in the spectra of P 2 W 18 Sn 3 @MIL-101 and P 2 W 18 Ce 3 @MIL-101 compared to the that of MIL-101 were attributed to the P–O and W–O vibrations of the sandwich polyoxometalates P 2 W 18 Sn 3 ( ref. 32 ) or P 2 W 18 Ce 3 , 37 respectively. The bands in MIL-101, P 2 W 18 Sn 3 @MIL-101 and P 2 W 18 Ce 3 @MIL-101 at 1400 cm −1 and 1552 cm −1 are correspond to (O–C–O) symmetric vibrations implying the presence of dicarboxylate within the framework, broad and strong bands at around 3430 cm −1 and 1620 cm −1 also confirms the presence of adsorbed water molecules stretching and bending vibrations or the guest molecules inside the pores and the other weak bands in the spectral region of 600–1600 cm −1 are attributed to benzene, including the stretching vibration C C groups (1514 cm −1 ), in plane and out–of plane bending modes of COO groups (400–700 cm −1 ), and the out–of plane deformation vibrations of benzene ring C–H groups at 1164, 1020, 889, and 748 cm −1 .…”