▎ 摘　　要

Photocatalyst composites of g-C3N4/ZnO/GO (graphene oxide) were successfully prepared by sol-gel method combined with thermal polycondensation. The composites were characterized by SEM, XRD, TGA, FT-IR, UV-vis and physical adsorption. The electrical properties of g-C3N4/ZnO/GO composites were characterized by open circuit potential method and AC impedance method. The degradation of methyl orange by composites was studied. The results demonstrate that composites have better photocatalytic efficiency for the degradation of methyl orange than g-C3N4. The most efficient photocatalytic degradation of methyl orange stimulated wastewater adopt that 1 g/L of composites solution, 120 min and degradation time at 35 degrees C with adding 120 mL/L of H2O2.