Table 1. Comparison between the Catalytic Degradation Efficiency of AuNPs, rGO-AuNPs, and Other Nanocatalysts Reported in Other Studies against MB.

catalyst	dye concentration (ppm)	pH	degradation efficiency (%)	time (min)	refs
reduced graphene oxide–gold nanohybrid	10	6	98	10	(76)
Au-Fe3O4/graphene	20	7	99	120	(77)
reduced graphene oxide magnetic composite (rGO/CoFe2O4)	20	3	100	24	(72)
Au-Cu2O/rGO	20	10.5	99.8	20	(78)
reduced graphene oxide/meso-TiO2/AuNPs	30	6	≃100	240	(79)
manganese-reduced (Mn/RGO) nanocomposite	50		70.4	30	(80)
manganese-cobalt-reduced (Mn-Co/RGO) nanocomposite			≃100
reduced graphene oxide–silver (rGO-Ag) nanocomposite			71.42	8	(81)
rGO-stabilized MnO/N-doped carbon nanofibers	20		100	180	(73)
MoS2	200	9	98	30	(82)
(MoS2-rGO) nanocomposite				10
graphene/MnO2 hybrids	50	6	≃100	5	(83)
gold nanoparticles (AuNPs)	10	5	≃100	immediately	the current work
	15		26.7
	20		24
reduced graphene oxide–gold nanoparticles (rGO-AuNPs)	10		≃100
	15
	20