Synthesis and evaluation of catalytic activities in rhodamine B degraded reaction by H₂O₂ of MIL-53(Al) dopping with iron

Abstract

In the present study, MIL-53(Al) metal-organic framework material dopping with iron (denoted as Fe-MIL-53(Al)) had been synthesized and applied as a catalyst to degrade rhodamine B (RB) in aqueous solution by H2O2. The obtained materials were characterized using X-ray diffraction (XRD), thermogravimetry analysis (TG), transmission electron microscopy (TEM), and energy dispersive X-ray (EDX). The influence of iron content on the structure of MIL-53(Al) and treated temperature of Fe-MIL-53(Al) were investigated. The results showed that the obtained Fe-MIL-53(Al), which was synthesized at mole ratio of Fe/Al = 1/9, had high catalytic activity for RB oxidation reaction by H2O2, RB degradation efficiency was 92%, and achieved 100% under UV radiation ([RB] = 10 mg/L). The treatment at 280 ºC had almost no effect on the structure of the material, but also slightly enhanced the catalytic activity.