Ultrasound Assisted Synthesis of Gadolinium Oxide-Zeolitic Imidazolate Framework-8 Nanocomposites and Their Optimization for Photocatalytic Degradation of Methyl Orange Using Response Surface Methodology

An ultrasound-assisted method was used to prepare gadolinium oxide (Gd2O3)-zeolitic imidazolate framework (ZIF)-8 nanocomposites. The surface morphology, particle size, and properties of the Gd2O3-ZIF-8 nanocomposites were examined using scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman spectroscopy, ultraviolet-visible (UV-vis) spectroscopy. synthesized as a catalyst degrade methyl orange (MO) under UV light irradiation at 254 nm. color aqueous MO dye solution during photocatalytic degradation Response methodology (RSM) four-factor Box-Behnken design (BBD) experiments optimize MO. significance experimental factors their interactions determined analysis variance (ANOVA). efficiency for reached 98.05% within 40 min nm conditions pH 3.3, 0.4 g/L dose, 0.0630 mM concentration, 431.79 mg/L H2O2 concentration. kinetics study showed that followed pseudo-first-order reaction rate law.