Similar to the paper-making process, the effi cient fl ame retardant graphene paper is conveniently obtained by using graphene oxide (GO) and hexachlorocyclotriphosphazene (HCCP) aqueous pulp. The "paper pulp" can also conceivably be used as ink to make other hydrophilic fi lms become fl ame retardant paper. Further, the as-prepared reduced GO-HCCP paper (RGO-HCCP paper), compared with GO-HCCP paper, can maintain its intact structure for a longer time in an ethanol fl ame. As a consequence of these preparation methods, the bearing temperature of the as-prepared graphene papers shows a signifi cant increase.

A one-step strategy for the development of graphitic-C3N4 functionalized graphene composites as advanced three-dimensional supercapacitor electrode materials.

Graphenes have attracted increasing attention in a variety of scientific fields. By modification with foreign elements such as boron, sulfur, and fluorine, their unique electronic and spin structures can be effectively tuned and the substituted or decorated graphenes as promising materials have been successfully employed in electrical, optical, and catalytic fields. In this review, we summarize the recent advances of these newly derived heteroatom substituted or decorated graphenes with an emphasis on the preparation methods, applications and the mechanisms of action. We are hopeful for future developments of heteroatom substituted or decorated graphenes in precisely controlled substitution methods, and finding wide applications of heteroatom substituted or decorated graphenes in many different fields.

In this study, N,P co-doped graphene (NPG) was prepared by a one-step pyrolysis using a mixture of graphene oxide and hexachlorocyclotriphosphazene (HCCP), in which HCCP was used as both the N and P source. Furthermore, it is shown that NPG electrodes, as efficient metal-free electrocatalysts, have a high onset potential, high current density, and long-term stability for the oxygen reduction reaction.