Accidental leakage of uranium causes a huge threat to human health and environmental security. Herein, a novel fluorescent MOF-on-MOF hydrogel complex, namely Tb-MOF@ZIF-8@PAM, is constructed using a “three-in-one” synthetic strategy for the simultaneous adsorption enrichment and sensitive detection of uranyl ions (UO 2 2+ ) in water. Combining ZIF-8 with Tb-MOF enables the composite to exhibit remarkable fluorescence enhancement, large fluorescence quantum yield, and exceptional stability. When used to detect of UO 2 2+ in water, the method ...
