Diverse bimetallic MOF polymorphs for the degradation of pollutants/antibiotics and quantum dot integration for enhanced WLED performance

A bimetallic composite of cobalt (Co) and nickel (Ni) integrated into a zirconium-based metal-organic framework (ZrMOF) was successfully synthesized via a hydrothermal method for dual-functional applications. The Ni-Co/ZrMOF composite demonstrated good photocatalytic activity in degrading organic pollutants, particularly the antibiotic tetracycline (TC), outperforming Ni/ZrMOF, Co/ZrMOF, and pristine ZrMOF. This enhanced performance was attributed to the synergistic effect of the bimetallic system, which significantly increased the production of reactive oxygen species. Additionally, the integration of Ni-Co/ZrMOFs enabled the fabrication of a white light-emitting diode (WLED) by incorporating green formamidinium lead-bromide perovskite quantum dots (FAPQDs) and red-emitting phosphors powder onto a blue LED chip. The inclusion of FAPQDs into the Ni-Co/ZrMOF framework not only modified its structural properties but also enhanced its chemical stability through a straightforward solution-processing method. The resulting WLED exhibited superior performance, achieving a National Television System Committee (NTSC) color gamut coverage of 126.6 %. Notably, the NTSC coverage achieved in this work surpasses previously reported values, highlighting the excellent performance of the Ni-Co/ZrMOF@FAPQDs composite. This composite exhibits precise color coordinates and significant potential for next-generation WLED applications, further underscoring its versatility in environmental remediation and advanced optoelectronic devices.