Synthesis of Core–Shell Magnetic Nanoparticles Containing Ultrasmall Domains of Silicalite‐1

Synthesis of core–shell nanostructures with magnetic core and zeolitic shell is an ongoing challenge. Herein, a strategy presented for preparation γ-Fe2O3@mesoporous silica (mSiO2) nanoparticles containing ultrasmall domains silicalite-1 in the (γ-Fe2O3@mSiO2/silicalite-1). The consists solid-state reorganization precursor amorphous mSiO2 into using tetrapropylammonium hydroxide (TPAOH) as organic structure-directing agent (OSDA) under mild hydrothermal (HT) conditions. formation crystalline investigated through detailed characterization products obtained at different times HT treatment by X-ray diffraction (XRD), Raman spectroscopy, Fourier-transform infrared spectroscopy (FTIR), scanning electron microscope (SEM) energy dispersive (EDS), transmission microscopy (TEM), nitrogen physisorption. By careful tuning time treatment, γ-Fe2O3@mSiO2/silicalite-1 are prepared. Benefitting from unique mesopores/microporous structure formed, nanostructure shows superior adsorption capacity to remove aniline aqueous solutions than γ-Fe2O3@mSiO2. Moreover, easily separated separation technique within 1 min.