Preparation method of visible light response type MIL-100(Fe) photocatalytic composite material

Abstract

The invention relates to preparation of photocatalytic materials, and aims to provide a preparation method of a visible light response type MIL-100(Fe) photocatalytic composite material. The preparation method comprises the following steps: adding trimesic acid and sodium hydroxide in the same parts by mass into deionized water; conducting uniform mixing to obtain a trimesic acid / sodium hydroxidecomposite solution; dropwise adding the composite solution into an equal amount of ferrite solution, then adding a surfactant, and conducting uniform mixing and full reacting to form a turbid liquid;and filtering the turbid liquid, conducting washing, drying the obtained solid to obtain the MIL-100(Fe) photocatalytic composite material. The synthesis method at room temperature is more convenient,the crystallization is more stable, the application stability of the catalyst is greatly improved, and the recycling service life of the catalyst is greatly prolonged. The surfactant surface modification technique effectively reduces the grain size, greatly enhances the specific surface area of the material, and enhances the photocatalytic reaction efficiency. The utilization efficiency of the material on visible light can be remarkably improved, and relatively strong visible light catalytic activity is obtained.

Description

technical field [0001] The invention relates to the preparation of photocatalytic materials, in particular to a preparation method of visible light response type MIL-100(Fe) photocatalytic composite material. Background technique [0002] Metal organic framework compounds (English name Metal organic Framework, MOFs) have many advantages in degrading organic pollutants: ① has a large specific surface area and porosity; Regulate the pores of MOFs with ligand species to selectively adsorb reactants and products; ③It has designability and controllability in structure and function, and can obtain high visible light response by modulating the species of ligands and metals ④ The topological structure of MOFs materials determines that the active sites are relatively dispersed, not easy to agglomerate, and the stability of the catalyst is high. [0003] Among MOFs, MIL-100(Fe) is less toxic, green and environmentally friendly, and more importantly, it has semiconductor properties. ...

AI Technical Summary

Problems solved by technology

However, its high photogenerated-electron recombination rate is currently one of the constraints on the visible light catalytic activity of MIL-100(Fe), and its preparation process is complicated, requiring the use of toxic substances such as HF to assist in the synthesis.

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