Table 2.

Comparison of specific capacitance values of different nanomaterials

Materials	Electrolyte	Specific capacitance values (F g−1)	Reference
S, N-GQDs	2 M KOH	362.60	This work
N-GQD/cMOF-5	1 M H2SO4	294.1	[37]
CQD aerogel	1 M LiClO4	294.7	[54]
Graphene nanosheets	6 M KOH	233.1	[55]
N-doped graphene	1 M KOH	282	[56]
N-GQD@cZIF-8/CNT	1 M H2SO4	540	[52]
Interconnected mesoporous carbon sheets	6 M KOH	242	[57]
Mn3O4-graphene QDs	6 M KOH	452.72	[58]
PVA-GQD/PEDOT	1 M H2SO4	291.86	[59]
NrGO/GQDs	6 M KOH	344	[60]
GQDs-graphene	6 M KOH	296	[61]
N-GQD@Fe3O4-HNTs	1 M Na2SO4	418	[62]
GQD-HNTs	1 M Na2SO4	363	[63]
Fe2O3 QDs/FGS	1 M Na2SO4	347	[64]
GQDs–3D graphene	1 M H2SO4	268	[65]
N-graphene nanosheet	6 M KOH	244.6	[66]
3D N-doped graphene	6 M KOH	334	[67]