Table 9.

Synthesis of nanoceria by Sol–gel method

S. no	Precursors	Medium	Method	References
1.	Cerium nitrate hexahydrate and oleic acid	Tri-n-octylamine, oleyamine and diphenyl ether	Nonhydrolytic sol–gel method	[105]
2.	Cerium nitrate hexahydrate and europium nitrate pentahydrate and citric acid monohydrate	Water and polyethylene glycol	Sol–gel method	[106]
3.	Cerium chloride heptahydrate and aqueous ammonia solution	Water and methanol	Sol–gel method	[107]