▎ 摘　　要

The membranes of O-(carboxymethyl)-chitosan (O-CMC), O-CMC-graphene oxide (GO) and O-CMC-reduced graphene oxide (rGO) are prepared by dialysis method, respectively. The membrane structures and properties are investigated with different techniques. Fourier transform infrared (FT-IR) and X-ray diffraction (XRD) spectra indicate that the composition (O-CMC) of the membranes is protonated. The mechanical strength of these membranes is enhanced with the added amount of GO. These membranes show effective adsorption capacity for dyes and Cu2+ in water, showing that they may be the promising applications for water purification including dye adsorption and selective dialysis.