Sonochemical synthesis of Zr-based metal–organic cages and their adsorption performance towards tartrazine

Abstract

Fast ultrasound-assisted processes were utilized for the first time to achieve the successful synthesis of two highly crystalline Zr-based metal–organic cages, namely ZrT-1 and ZrT-1–OH. By varying the temperature and power level, the desired product was obtained after 5–8 minutes as crystalline particles with cubic shape (ca. 2–8 μm). Furthermore, ultrasound-assisted synthesized ZrT-1 and ZrT-1–OH demonstrated exceptional performance for tartrazine adsorption. Under optimal conditions, their maximum adsorption capacities were determined to be 238.6 mg g⁻¹ and 225.3 mg g⁻¹, respectively.