▎ 摘　　要

In the present study, laccase (Lac) was immobilized into molecular sieves (Lac/NaY, Lac/SSZ, Lac/MCM) and graphene oxide (Lac/GO). The activities of these laccase preparations were comparatively studied on phenolic lignin model compound (vanillyl alcohol), nonphenolic lignin model compound (veratryl alcohol) and organosolvlignin, in the presence of ABTS. GO immobilized laccase (Lac/GO) afforded better performance in terms of conversion rate and reusability than the molecular sieves during oxidation of vanillyl alcohol and veratryl alcohol. GPC and P-31-NMR were used to characterize the structural modifications induced in the organosolv lignin. Compared to the molecular sieves, the GO-immobilized laccase was found to be more reactive, displaying higher distinct reaction selectivities in the oxidative pattern of the lignin.