▎ 摘　　要

Sulfur and nitrogen dual doped graphene have been extensively investigated in the field of oxygen reduction reaction, supercapacitors and batteries, but their magnetic and microwave absorption performance have not been explored. Besides, the effects of sulfur and nitrogen doping sequence on the morphology, structure and absorption performance of the resultant dual doped graphene remain unexplored. In this work, nitrogen and sulfur dual doped graphene with different doping sequence was successfully prepared using a controllable two steps facile thermal- treatment route. The first doping process played a decisive role on the morphology, lateral size, interlayer distance, doping degree and ultimately magnetic and absorption properties of the dual doped graphene. Meanwhile, the second doping step affected the doping sites and further had a repairing or damaging effect on the final doped graphene. The dual doped graphene samples exhibited two pronounced absorption peaks which intensity was decided by the order of the doping elements. The investigated nitrogen and sulfur dual doped graphene with controlled doping order provides a strategy for understanding the interaction between dopants in graphene and further acquiring microwave materials with tunable absorption bands by varying doping sequences.