Remarkably Enhanced Photodegradation of Organic Pollutants by NH2-UiO-66/ ZnO Composite under Visible-Light Irradiation

Semiconductor photocatalysis is a novel highly efficient and low-cost method for removing organic pollutants from wastewater. However, the photoreduction performance of semiconductors on limited due to weak absorption visible light caused by its wide band gap low carrier utilization rate resulting severe electron-holes recombination. In present study, flower-like NH2-UiO-66 (NU66)/ZnO nanocomposites were prepared using facile exhibited high efficiency under driven photocatalysts. The X-ray diffractometer (XRD), scanning electron microscope (SEM), transmitor (TEM), photoelectron spectroscopy (XPS) used characterize samples, indicating that NU66/ZnO was successfully synthesized. photocatalytic activity determined measuring photodegradation methylene blue (MB) malachite green (MG) visible-light irradiation. optimal nanocomposite loading 5% wt NU66 demonstrated highest degradation MB. composite approximately 95-fold 19-fold higher than ZnO respectively. enhanced further confirmed through photoelectrochemical analysis. formation type II heterojunctions between counterparts significantly suppressed recombination photogenerated charge carriers. Photocatalytic experiments with different quenchers indicated effect superoxide anion radicals (•O2− ) had greater other scavengers. Additionally, improved mechanism underlying also explored. These findings establish basis development MOF based heterojunction pollution remediation.