Supplementary Material for Chemical Communications
This journal is © The Royal Society of Chemistry 2003
Table 1 Structural properties of the SBA-15 samples
Samples
Unit cell a
Pore size w a Wall
Pore
BET surface
b
a
SiO2/P123 as-syn. calcined BJHads./BJHdes. thickness volume area a
(r)
(nm)
(nm)
(nm)
(cm3/g) (m2/g)
45
60
75
a
12.29
12.57
11.85
9.99
10.29
10.62
8.6 / 6.6
7.4 / 6.0
6.9 / 5.4
1.39
2.89
3.72
1.17
0.86
0.72
701
611
527
We do not intend here to discuss the accuracy of the evaluation methods used. In any cases, they can be
employed systematically to identify trends. However, the BJH is known to underestimate pore sizes by about
20-25% (ref. 8) b Calculated from a- wBJH adsorption
Supplementary Material for Chemical Communications
This journal is © The Royal Society of Chemistry 2003