Table 7.

Comparison of the Synthesis Route and removal capacity of different metal oxide nanocomposites adsorbent toward Congo Red dye.

Material	Synthesis Route	Removal capacity	References
Fe2O3–MgO Nanocomposite	One step hydrothermal method	95 %	[64]
FexCo3-xO4 Nanoparticles	Aqueous Precipitation Method	86.12 %	[65]
CeB4 Nanocrystal	Molten salt method	97.8 %	[66]
Fe3O4@carbon@ZIF-8 Nanoparticles	Self-assembly	∼80 %	[67]
Polyaniline-zinc titanate nanocomposite	Polymerisation reaction	98 %	[68]
l-cysteine decorated rGO/Polyaniline	Aqueous Precipitation	98 %	[69]
Biosynthesized ZnO Nanoparticles	Sol-gel technique.	92 %	[70]
ZnO/Chitosan Nanocomposites	In-situ Precipitation	90 %	[71]
Biosynthesized ZnO Nanoparticles	Green Synthesis	94.125 %	[72]
Fe3O4-TSPED- Tryptophan nanoparticles	Simple Precipitation Method	99 %	[73]
Ag–Cu–CeO2 nanocomposites	Aqueous Co-precipitation method	96.83 %	This Study