A facile hydrothermal synthesis route to N and S, N co-doped graphene quantum dots (GQDs) was developed by using citric acid as the C source and urea or thiourea as N and S sources. Both N and S, N doped
Nitrogen, sulfur-codoped graphene sponge as electroactive carbon interlayer for high-energy and -power lithium-sulfur batteries.
Xing LB, et al.
Journal of Power Sources, 303, 22-28 (2016)
Sulfur and nitrogen dual-doped mesoporous graphene electrocatalyst for oxygen reduction with synergistically enhanced performance.
Ji Liang et al.
Angewandte Chemie (International ed. in English), 51(46), 11496-11500 (2012-10-12)