Application Ln-MOFs As Fluorescence Sensing Materials For The Fluorescence Detection Of Environmental Pollutants

Food safety and environmental pollution have become the focus of human concern.Detecting harmful ions in food and water quality,exceeding standard ions,and organic molecular pollutants in the air have become particularly important.With the development of science and technology,We have higher requirements for chemical sensors,including sensitivity and selectivity.Metal-organic framework compounds(MOFs),as new functional materials,have unique chemical structures and wide application prospects,among which rare earth metal-organic framework compounds(Ln-MOFs)have been studied by a large number of researchers.In this paper,We synthesize two kinds of Ln-MOFs with fluorescence properties.They can detect metal aluminum ions and aldehydes in the environment respectively.The main work contents of this paper are as follows:1.Yttrium doped Eu/Y-MOF and Eu-BTC fluorescent compounds were synthesized by solvothermal method.2.The synthetic materials were characterized by XRD,SEM,FTIR and UV.3.The performance of the synthetic material was analyzed by FL test,and it was preliminarily judged that it could be used as fluorescence sensing material,and the selective fluorescence detection experiment was carried out.4.The results showed that the Eu/Y-MOF compound could detect aluminum ions in the environment,and the fluorescence was greatly enhanced by aluminum ions. The linear range was 0-10 ppm,and the detection limit was 0.36 ppm.Eu-BTC can detect three aldehydes and distinguish them.Formaldehyde has no effect on the fluorescence of this material.Acetaldehyde can quench its red light at 618 nm, with a linear range of 0-20 ppm and a detection limit of 0.10 PPM 10-80 ppm.The detection limit was 0.71 ppm.5.Study the fluorescence detection mechanism.