In a typical process, 2.5 mmol La(NO3)3*6H2O, 2.24 g 50% Mn(NO3)2 solution (containing 7 mmol Mn2+), 10 mmol citric acid (C6H8O7*H2O), 45 mmol urea and 1.0 g P123 were dissolved with a mixed solvent containing 2 mL ethanol, 8 mL ethylene glycol and 2 mL H2O. After being stirred for 5 h, the obtained solution was transferred into a 70 mL stainless autoclave, and heated at 100 degC for 48 h. The solid product was washed and collected by centrifugation, then dried overnight at 60 degC. This gray product was calcined at 600 degC for 8 h in air flow to convert it to LaMnO3.
La(NO3)3*6H2O
dissolved
2.5 mmol
mmol
50% Mn(NO3)2 solution
dissolved
2.24 g
g
solution
Mn(NO3)2
50%
%
Mn2+
7 mmol
mmol
citric acid (C6H8O7*H2O)
dissolved
10 mmol
mmol
urea
dissolved
45 mmol
mmol
P123
dissolved
1.0 g
g
solvent
ethanol
2 mL
mL
solvent
ethylene glycol
8 mL
mL
solvent
H2O
2 mL
mL
stainless autoclave
70 mL
mL
obtained solution
heated
100 degC
degC
obtained solution
heated
48 h
h
solid product
dried overnight
60 degC
degC
gray product
calcined
600 degC
degC
gray product
calcined
8 h
h