TABLE 3.

Summary of graphene derivatives with WO₃ and Fe₂O₃ nanocomposites for photodegradation of dye pollutants.

Photocatalyst	Metal oxide morphology	Targeted pollutant	Removal (%)	Ref.
rGO/WO3 nanoplate	Nanoparticles	Congo red	94	Yadav et al. (2021)
rGO/WO3 nanocomposite	Nanoparticles	Methylene blue	82	Kodarkar et al. (2021)
rGO/WO3 nanocomposite	Nanorod	Rhodamine B	96	Govindaraj et al. (2021)
Indigo-rGO/WO3 nanocomposite	-	Methylene blue	80	Khan et al. (2019)
GO/WO3 nanocomposite	Nanorod	Methylene blue	83	Hu et al. (2018)
GO/α-Fe2O3 nanocomposite	Nanoparticles	Methylene blue	90	Mandal et al. (2018)
Graphene/α-Fe2O3	-	Rhodamine B	99	Frindy and Sillanpää, (2020)
Graphene/Fe2O3/CuO	-	Methylene blue	94	Nuengmatcha et al. (2019)
Graphene/Fe2O3/TiO2 nanocomposite	-	Rhodamine B	97	Zhang et al. (2018)
GO/Fe2O3/SnO2 nanocomposite	-	Methylene blue	98	Botsa et al. (2020)
rGO/SnO2	Aerogel	Methyl orange	84	Kim et al. (2019)
rGO-SnO2	-	Rhodamine B	98	Kim et al. (2019)