▎ 摘　　要

Ferromagnetism of two-dimensional (2D) carbon-based materials, such as g-C3N4 and graphene based materials, is technologically and fundamentally important for many applications in spintronics. Herein, nitrogen-vacant g-C3N4 (V-N-CN) and nitrogen doped graphene (N-G) have been successfully obtained by a facile metal co-heating denitrification from the g-C3N4 matrix. Magnetic measurement results indicate that both V-N-CN and N-G exhibit high temperature ferromagnetism with the Curie temperature of 926 K and 1043 K, respectively. First principle calculation results show that such unusual ferromagnetism is closely related to their N configuration in each case. This work provides a new method for the preparation of magnetic 2D carbonitride materials.