36714.4 Different methods used for the synthesis of metal oxide nanopowder
FIGURE 14.17
Reverse microemulsion – sol–gel processing.
Precursor solution
Precursor
addition
Hydrolysis
Reverse microemulsion
Ageing
condensation
Particle recovery
Freeze drying
Rotoevaporation
Filtration
Calcination
and
crystallization
Drying
Surfactant and
solvent
removal
The speed for ligand exchange process is slow at room temperature and increases
with increase in temperature and use of catalyst.
MClMORMOR
MCl redistribution
≡→≡
≡≡
14.4.10 PECHINI METHOD
This method is based on citric acid and ethylene glycol using water in the presence of
metal chloride or nitrates as a metal ...
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