Preparation method of surface charge modified two-dimensional covalent organic framework photo-thermal driving device

The invention discloses a preparation method of a surface charge modified two-dimensional covalent organic framework photo-thermal driving device, and provides a method for preparing covalent organic framework ink with good dispersity by utilizing a surface ion adsorption method, which is used for preparing a large-scale flexible uniform film. Wherein salt ions are captured by holes in the covalent organic framework material, so that the surface Zeta potential of the covalent organic framework material is changed, agglomeration of the covalent organic framework material in water can be effectively prevented, and the solution dispersity of the covalent organic framework material is improved. Therefore, the large-size flexible uniform covalent organic framework hybrid heterogeneous film can be easily prepared by using a simple coating method and is used for a photo-thermal driving device. The surface Zeta potential of the frame material is adjusted by a simple method for capturing salt ions through holes in the