GO–MO hybrids with degradation/adsorption/photocatalytic properties to organic molecules (dyes or others) and metal ions.

Composition	Synthesis method, characteristics	Target molecules/metal ions	Ref.
GO–CuO	(i) Hydrothermal synthesis	(i) Brilliant green	(i) 112
	(ii) CuO/Cu2O heterostructure (10–15 nm)	(ii) Tetracyclin, MOr	(ii) 116
	(iii) Catalytic property	(iii) Reduces –NO2 to –NH2	(iii) 113
GO–AgO/Ag2O	(i) Synthesized by electrostatic interaction	(i) RhB	(i) 134
	(ii) Electrostatic interaction	(ii) MB	(ii) 137 and 141
	(iii) In situ green synthesis method	(iii) MB, RhB	(iii) 138
	(iv) GO–Ag/V/Mo heterostructure via precipitation method	(iv) RhB	(iv) 139
GO–ZnO	(i) Chemical method, ZnO (∼15–20 nm)	MB	(i) 144, 146 and 147
	(ii) Solution method		(ii) 151 and 152
	(iii) Flower like morphology of ZnO		(iii) 145
GO–Fe2O3, GO–Fe3O4	(i) Impregnation process, both α and γ phases are present	RhB, 4-nitrophenol, MB, Cu2+, fulvalic acid, NH4ClO4, AO7, Cd2+, Pb2+	166, 167, 169, 170, 172, 174, 175, 178 and 183
	(ii) In situ chemical deposition
	(iii) Core–shell structure (10–15 nm Fe3O4)
GO–NiO	(i) Hydrothermal method, solution mixing	MB, 2-chlorophenol, methyl violet (MV)	186–190
	(ii) Radiofrequency sputtering
	(iii) In situ reduction, particle size ∼20 nm
GO–CdO	Solution phase method without surfactant	MB, RhB	191
GO–ZrO2	Hydrothermal and co-precipitation method	RhB, MB, As, Cr	195, 197 and 198
GO–TiO2	Eco friendly synthesis using green alga	Congo red, crystal violet	202 and 203
GO–MgO	Hydrothermal and solvothermal method	Congo red, phenol ozonolysis	206, 212 and 215
GO–MgO	Co-precipitation	Pb2+, Cu2+	207 and 214
GO–EDTA	Chemical (silanization) reaction	Pb2+, Cu2+, Ni2+, Hg2+	217–219
GO–chitosan	Self-assembly, formation of 3D network	Pb2+, Cu2+, MB, RhB, Congo red, eosin Y	223–226
GO–PAn	Chemical oxidation with APS	Cd2+ adsorption	260
GO–PPy	Electrochemical deposition	Ag+, Cu2+, Pb2+, Cd2+, Fe3+ adsorption	270