Chemistry & Chemical Engineering Research Center of Iran

Synthesis and Characterization of HNTs@Fe3O4@HA-Cu Based on Halloysite Nanotubes as a Green, New and Recyclable Nano-catalyst for the Synthesis of 1H-tetrazole Derivatives

Document Type : Research Articles

Abstract
Recently, researches have been directed towards a simple and consistent path to green chemistry.
In this study, halloysite nanotubes were modified by Fe3O4 nanoparticles, humic acid molecules and copper (HNTs@Fe3O4@HA-Cu) for the first time. Next, the chemical structure, crystalline structure, surface morphology, thermal stability and magnetic properties of the catalyst were checked by Fourier transform infrared (FT-IR), X-ray diffraction (XRD), Field Emission-scanning electron microscopy (SEM), vibration sample magnetometer (VSM) and thermogravimetric analysis (TGA). Then, the catalytic performance of the novel and eco-friendly HNTs@Fe3O4@HA-Cu nanocatalyst was investigated in the synthesis of tetrazole derivatives as an important heterocyclic compound. The utilization of this nanocatalyst has many advantages including high efficiency, using non-toxic solvent and doing the reaction in the mild condition. Also, this nanocatalyst has some prominent features like easy separation, green, recoverable and reusable, stability, convenient preparation and highly efficient.

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Articles in Press, Accepted Manuscript
Available Online from 11 August 2025