Preparation method of composite metal organic framework material UiO-67

Abstract

The invention discloses a preparation method of a composite metal organic framework material UiO-67. The method comprises the following steps: ultrasonically dispersing ZrCl4 into DMF, and adding hydrochloric acid to obtain a mixture A; dispersing 4,4-diphenyl phthalic acid in DMF to obtain a mixture B; blending the mixture A and mixture B in a reaction kettle to obtain white precipitate; respectively washing the precipitate with DMF and ETOH, and performing pumping filtration to obtain a product; drying the product in a vacuum drying oven to obtain UIO-67; preparing a SRB solution; placing the UIO-67 in the vacuum drying oven for 12 hours; placing the UIO-67 in the SRB solution, and performing standing for impregnation in a water bath pot; and after filtering, drying the material in the vacuum drying oven to obtain the UIO-66@SRB composite fluorescent material. The method has the advantages that a ligand and the metal center are separately dissolved during the preparation process, theoptimum rapid dissolution temperature is explored, and the quantitative hydrochloric acid is added to ensure the nucleation environment. The combination of UIO-67 and SRB is realized, a structurallystable UIO-67 is prepared, and the pores can disperse SRB to avoid the aggregation quenching.

Description

technical field [0001] The invention relates to the technical field of metal organic framework materials, in particular to a preparation method of a composite metal organic framework material UiO-67. Background technique [0002] Since the 1990s, science and technology have continued to develop and progress, and the interdisciplinary communication between disciplines has become closer and more common, which has promoted the rapid progress of science and technology. The fields of chemistry and materials are also exploring each other without boundaries, and a new coordination polymer, a new type of porous material, is discovered, namely metal-organic framework materials (MOFs). Metal-organic framework materials are porous coordination polymers formed by metal ions or metal clusters and organic bridging molecules as ligands. It combines the functions and characteristics of inorganic blocks and organic blocks, and is porous and designable. Excellent frame structure, high specif...

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Problems solved by technology

[0004] However, due to the small energy gap of the red fluorescent dye, non-radiative recombination is easy to occur; it is difficult to match the energy level with the doped host, and the energy transfer is incomplete (low efficiency)

There is a strong π-π interaction in the red light dye, and in the case of high doping concentration, it is easy to polymerize between molecules, resulting in concentration quenching

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