A Multifunctional Porous Uranyl Phosphonate Framework for Cyclic Utilization: Salvages, Uranyl Leaking Prevention, and Fluorescent Sensing

The
material for managing and monitoring waste made from the waste
itself is an excellent example of cyclic utilization, which could
reduce issues and be more sustainable. A three-dimensional porous
uranyl phosphonate MOF (UPF-105) was synthesized via
a hydrothermal method. UPF-105 is stable in aqueous solution
with pH in the range of 1–11 and maintains crystallinity below
215 °C. The uncoordinated phosphonate groups in the channels
act as functional anchors to selectively capture uranyl ions, with
a maximum uranium adsorption capacity of 170.23 mg g–1. The fluorescence of UPF-105 makes it a good candidate
for a uranyl ion sensor in uranium-contaminated solutions with concentrations
in the range of 5–90 ppm.