Pore structure and surface area of silica SBA-15: influence of washing and scale-up

• Jörg P. Thielemann,
• Frank Girgsdies,
• Robert Schlögl and
• Christian Hess

Beilstein J. Nanotechnol. 2011, 2, 110–118, doi:10.3762/bjnano.2.13

• larger batch sizes the influence of the quantity of solvent on the quality of the SBA-15 is reduced. Keywords: SBA-15; scale-up; silica mesoporous material; tensile strength effect; washing; Introduction SBA-15 is a mesoporous silica sieve based on uniform hexagonal pores with a narrow pore size

• similar features to the 1× half batch discussed in the previous section. The surface area was maximized in the little washed sample 3B (Table 1) and the typical bulge in the desorption branch due to the tensile strength effect was observed at p/p0 = 0.45 for 3C (Figure 8). As the extent of the bulge is

• pores of the prepared SBA-15 materials exhibit an average diameter of 70 Å. If part of those pores is narrowed to approximately 50 Å or lower, evaporation is delayed [25][26][27]. As a result the tensile strength effect is observed at p/p0 = 0.45 leading to a forced closure of the hysteresis loop. Its