Table 3.

Optimization parameters for the synthesis of Y₂O₃: Pr³⁺ NCs by homogeneous precipitation method.

Entry	Time (h)	V H2O (mL)	Urea Amount (mol)	Observations
1	120	360	0.485	Well-dispersed spheres of 260(26) nm; NC size (PXRD): 20.2(2) nm.
2	120	720	0.485	Well-dispersed spheres of 233(41) nm; NC size (PXRD): 21.8(3) nm.
3	120	200	0.485	Well-dispersed spheres of 229(20) nm; NC size (PXRD): 25.2(4) nm.
4	120	360	0.166	Very well-dispersed spheres of 338(35) nm; NC size (PXRD): 26.9(3) nm.
5	120	360	1.415	Agglomerated spheres of 75(34) nm; NC size (PXRD): 22.2(2) nm.
6	120	360	0.832	Well-dispersed spheres of 219(24) nm; NC size (PXRD): 21.2(2) nm.
7	120	200	0.832	Very well-dispersed spheres of 155(20) nm; NC size (PXRD): 30(5) nm.