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| gel composition | surface area (m2/g) | pore volume (cm3/g) | pore diameter (nm) | elemental composition (mol %) XPS |
|---|---|---|---|---|
| sample-1 (standard) | 449 | 0.22 | 1.97 | Si0.195Al0.422P0.322 |
| sample-2 (HClO4–) | 446 | 0.22 | 1.97 | Si0.189Al0.461P0.361 |
| sample-3 (HF) | 440 | 0.22 | 1.96 | Si0.186Al0.468P0.345 |
| sample-4 (H3PO4) | 446 | 0.22 | 1.98 | Si0.177Al0.466P0.329 |
| sample-5 (NaNO3) | 461 | 0.23 | 2.01 | Si0.179Al0.461P0.361 |
| sample-6 (aq. media) | 444 | 0.22 | 1.97 | Si0.187Al0.484P0.326 |
