Table 2.
Surface parameters and average crystallite size calculated from XRD for A, AC1, AC2.5 and AP supports.
| Support | S BET (m2 g− 1) |
VP (cm3 g− 1) |
Dp (nm) |
ao (nm)a | Crystallite size(nm) | ||
|---|---|---|---|---|---|---|---|
| D XRD b | D BETc | D TEM d | |||||
| A | 140 | 0.43 | 10.9 | 0.119 | 8.3 | 10.8 | 0.8–1.2 |
| AC 1 | 243 | 0.52 | 6.5 | 0.118 | 11.6 | 6.2 | 1.8–3.5 |
| AC 2.5 | 285 | 0.63 | 7.7 | 0.118 | 12.1 | 5.3 | 1.5–3.5 |
| AP | 228 | 0.39 | 5.7 | 0.118 | 10.3 | 6.6 | 1.5–5.2 |
a: is the unit cell parameter of alumina lattice calculated by equation.
a= d440 [j2+ k2+ l2]1/2 (4).
b: crystallite size calculated by scherrer equation.
c: crystallite size calculated by BET equation.