1results about How to "Increase light absorption intensity" patented technology

The application discloses a preparation method of Cu / PDI composite material, which comprises the following steps: step 1, 0.3993g Cu(CH3COO)2.H2O is added into 21mL DMF aqueous solution with a volume fraction of 14%-100%, and stirring is conducted to completely dissolve the Cu(CH3COO)2.H2O, so as to obtain solution A; step 2, 1g PVP is added into the solution A, initial stirring is conducted, then 3.993-35.937mg PDI is added, and continuous stirring is conducted, so as to obtain solution B; and step 3, the solution B is transferred into a polytetrafluoroethylene reaction kettle, the reaction kettle is placed into a drying box, reaction is carried out at 140-180 DEG C for 5-8h, the reaction kettle is cooled to room temperature, and the product C is collected, and then washing and vacuum drying are sequentially conducted, so as to obtain the Cu / PDI composite material, the near-infrared light absorption intensity of the Cu / PDI composite material is enhanced, and the Cu / PDI composite material has excellent photocatalytic activity.