Mn 3 O 4 nanodots loaded g-C 3 N 4 nanosheets for catalytic membrane degradation of organic contaminants.

•Highly dispersed Mn3O4 nanodots loaded g-C3N4 nanosheets (Mn3O4/CNNS) were synthesized.•A Mn3O4/CNNS-150@PTFE membrane was also prepared by facile vacuum filtration.•The catalytic membrane exhibits high catalytic ability and stability for contaminants removal.•The redox circles of manganese species were the main the reason for PMS activation.