Polyphenolic hydroxyl COFs aerogel rich in hydrogen bond donor as well as preparation method and application of polyphenol hydroxyl COFs aerogel

The invention discloses polyphenol hydroxyl COFs (covalent organic frameworks) aerogel rich in hydrogen bond donors as well as a preparation method and application of the polyphenol hydroxyl COFs aerogel. The preparation method comprises the following steps: dispersing an aromatic polyammonia monomer and a phenolic hydroxyl group-containing aromatic polyaldehyde monomer into a benign solvent to form a uniform suspension, then adding an acid solution for catalysis, carrying out a Schiff-base reaction to obtain wet gel, and carrying out aging and supercritical drying on the wet gel to obtain the phenolic hydroxyl group-containing aromatic polyaldehyde hydrogel. The obtained COFs aerogel material which is stable in molecular structure, has a special pore structure and good mechanical properties and is rich in phenolic hydroxyl group modifications is applied to adsorption separation of antibiotics and/or harmful heavy metal ions in an aqueous solution as an adsorbent, has the advantages of large adsorption capaci