Boehmite magnetic nanoparticles as a practical and magneticallyrecoverable nanocatalyst in the synthesis of tetrazoles

High catalytic activity is usually observed in the homogeneous catalyst systems [۱]. However,purification of the products and recovery of the catalyst is often difficult and time consuming inthe homogeneous catalyst systems [۲]. In the other hand, clean technology and green chemistryrequire the use of recyclable catalysts [۳]. While we need to a catalytic systems which haverecyclability and high activity. This goal is achieved by nanocatalysts which are the bridge betweenheterogeneous and homogeneous catalysts [۴]. However, nanoparticles (NPs) are not fullyrecycled by conventional methods such as centrifugation or filtration. All of these problems canbe overcome using magnetic nanoparticles (MNPs) [۵], which are quickly, easily and completelyrecovered using an external magnet [۶,۷]. In this work, boehmite MNPs were synthesized from ahybrid of boehmite and Fe۳O۴ nanoparticles. At first, boehmite nanoparticles were prepared. Then,these nanoparticles were magnetized using Fe۳O۴ NPs. Boehmite MNPs was characterized byTEM, SEM, EDS, WDX, ICP, FT-IR, Raman, XRD and VSM techniques. Then, boehmite MNPswere applied as a homoselective, highly efficient, and recoverable nanocatalyst in the synthesis oftetrazoles. Boehmite magnetic nanoparticles was recycled for several runs in the synthesis oftetrazoles.