The invention belongs to the technical field of
fluorescence sensing detection, and particularly relates to an Ln-MOF material for detecting metamitron herbicide and a preparation method of the Ln-MOF material. The preparation method comprises the following steps: dissolving Tb (NO3) 35H2O, Eu (NO3) 35H2O, diphenyldicarboxylic acid and o-fluorobenzoic acid in a DMF (
Dimethyl Formamide)
solvent, carrying out heat treatment, and carrying out
vacuum drying to obtain the Ln-MOF material Eu < 0.001 > Tb < 0.999 >-BPDC. According to the invention, the
lanthanide bimetal organic framework (Eu < 0.001 > Tb < 0.999 >-BPDC) is used for
synchronous detection of metamitron for the first time, the
response time to metamitron is only 10 seconds, the stable performance is still maintained after repeated recycling, and the defects of
slow response and poor stability of a traditional
fluorescence sensor are overcome. The probe can be directly detected in a DMF (
Dimethyl Formamide) solution, can be repeatedly used, and provides a novel platform for on-site rapid screening of herbicide metamitron in the environment.