Ag-Cu Bimetallic Nanoparticles Prepared by Microemulsion Method as Catalyst for Epoxidation of Styrene

Table 3

The crystalline size of Ag and Al₂O₃. Angle 2θ, corrected half width (β), corresponding to (111) peak of Ag and (440) peak of γ-Al₂O₃ and particles diameter “d” after Scherrer equation for Ag-Cu colloids supported on γ-Al₂O₃.

Ag/Cu	For Ag colloids			For Al2O3 colloids
	2θ (°)	β (°)	“d” (nm)	2θ (°)	β (°)	“d” (nm)
Al2O3	n.c.	n.c.	n.c.	66.005	0.056	2.92
1/0	37.690	0.029	4.98	65.846	0.059	2.77
3/1	37.382	0.029	4.99	67.846	0.042	3.93
1/1	37.382	0.029	4.99	67.846	0.063	2.62
1/3	n.c.	n.c.	n.c.	65.905	0.063	2.59
0/1	n.c.	n.c.	n.c.	66.136	0.046	3.56