▎ 摘　　要

NOVELTY - Preparing polyethyleneimine cross-linked layered composite film involves dispersing graphene oxide in deionized water in 250 mL beaker and ultrasonically obtaining graphene oxide dispersion. Titanium(IV) Sulfate is added and mixed solution is heated at 60 degrees C for 24 h, centrifuged, washed and dried to obtain graphene oxide/titania nanocomposites. The graphene oxide/titania nanocomposite material is dispersed in water, and the ammonia is adjusted to pH to obtain the graphene oxide/titanium dioxide dispersion. The oxidized graphene / titania nanocomposites are dispersed in water. USE - Method for preparing polyethyleneimine cross-linked layered composite film for removing dye molecules in water (claimed). ADVANTAGE - The method enables to prepare polyethyleneimine cross-linked layered composite film, which allows the layered composite film to have a more stable separation performance. DETAILED DESCRIPTION - Preparing polyethyleneimine cross-linked layered composite film involves dispersing graphene oxide in deionized water in 250 mL beaker and ultrasonically obtaining graphene oxide dispersion. Titanium(IV) Sulfate is added and mixed solution is heated at 60 degrees C for 24 h, centrifuged, washed and dried to obtain graphene oxide/titania nanocomposites. The graphene oxide/titania nanocomposite material is dispersed in water, and the ammonia is adjusted to pH to obtain the graphene oxide/titanium dioxide dispersion. The oxidized graphene / titania nanocomposites are dispersed in water. The aqueous ammonia is added adjust the pH to obtain graphene oxide/titania dispersion. The oxidized graphene / titanium dioxide dispersion is stirred uniformly, the amino polymer is added and dissolved by ultrasonic treatment, and the resulting colloidal solution is taken as the base film with the mixed cellulose film and vacuum filtered at a temperature to obtain polyethyleneimine cross-linked layered composite film.