Graphene oxide(GO) can be quickly deposited on a positively charged porous matrix via a layer-by-layer self-assembly strategy because GO nanosheets contain rich negatively charged, oxygen-containing function groups, such as COOH. In this paper, the GO-ceramics composite nanofiltration membrane was prepared via layer-by-layer deposition of GO solution and eolyethyleneimine(PEI) solution alternately, and then cross-linked by epoxy chloropropane(ECH) on 3-aminopropyltriethoxysilane-modified porous Al_2O_3 supp...