Precious metal loaded covalent organic framework composite material and preparation method therefor

A method for preparing a precious metal loaded Covalent Organic Framework (COF) composite material catalyst, comprising the following steps:

• (1) mixing TpMA, chloroauric acid (HAuCl4) and methanol;
• and
• (2) adding sodium borohydride (NaBH4) in a reaction system of step (1) for reaction, so as to obtain the precious metal loaded covalent organic framework composite material catalyst,
• wherein a mass ratio of the TpMA, the HAuCl4 and the methanol in step (1) is 10:1-5:0.5-1.5;
• a ratio of a mass of the HAuCl4 to an amount in moles of the NaBH4 is 1-5 g:0.4 mol;
• and a concentration of the NaBH4 is 1.5-2.5 mol/L;
• and
• the TpMA in step (1) is prepared by a process comprising:
• A, first mixing p-toluenesulfonic acid and melamine, and performing grinding for 12-30 min;
• B, then adding 1,3,5-triformyl phloroglucinol into a resulting reaction system of step A, and performing grinding for 2-4 h;
• and
• C, finally adding 0.1-0.5 mL of water into a reaction system of step B, performing grinding, using DMF for washing for 2-3 times, and performing vacuum drying, so as to obtain the TpMA.