Preparation of Fe3O4@SiO2@Cu-MoO3 core–shell nanostructures: synergistics effects of copper and molybdenum for catalytic enhancement

The development of bimetallic particles on a nano-scale for increasing catalytic activity has remained an enormous challenge in the catalytic arena. In this work, a new type of bimetallic particle catalyst was designed and prepared for the synthesis of benzothiazoles. First, mṣagnetic Fe3O4 nanoparticles (NPs) were produced using a co-precipitation method of working and next covered with a silica substrate. In addition, molybdenum trioxide (MoO3) crystals are used as outer shell precursors in order to stabilization of Cu2+. Using different techniques such as wide-angle XRD, FT-IR, TGA-DTG, VSM, BET, FESEM, and TEM spectroscopy, the core–shell nanocomposite structure was investigated. The proposed core–shell nanocomposites indicated excellent catalytic properties for the preparation of benzothiazole derivatives from various aldehydes and amino thiophenol that resulted in a product with higher efficiency, and high reaction speed, and high selectivity. The findings indicated that copper and MoO3 synergetic effects in the synthesis of benzothiazoles. The current study provided a rational design and synthesis of multifunctional catalysts for the development of green chemistry and green technologies.