Table 1.
Textural properties of the six magnetic materials synthesised.
| Material | SBET (m2/g) a | Pore Volume (cm3/g) b | Pore Diameter (Å) c | Elemental Analysis (%) | |||
|---|---|---|---|---|---|---|---|
| C | N | H | (mmol ligand/g) d | ||||
| Fe3O4 | - | - | - | - | - | - | - |
| Fe3O4@SiO2 | 147 | 0.18 | 125.8 | - | - | - | - |
| Fe3O4@SiO2@C8 | 26 | 0.09 | 124.4 | 3.432 | 0.000 | 1.070 | 0.286 |
| Fe3O4@SiO2@C18 | 24 | 0.10 | 124.9 | 3.227 | 0.000 | 0.928 | 0.134 |
| Fe3O4@SiO2@mSiO2 | 355 | 0.23 | 38.9 | - | - | - | - |
| Fe3O4@SiO2@mSiO2@C8 | 191 | 0.14 | 39.0 | 10.426 | 0.000 | 2.174 | 0.869 |
| Fe3O4@SiO2@mSiO2@C18 | 14 | 0.04 | 36.4 | 11.310 | 0.000 | 2.178 | 0.471 |
a SBET: Specific surface area calculated by Brunauer–Emmett–Teller (BET) method. b Total pore volume was measured at relative pressure (P/P0) = 0.97. c Pore diameter estimated by using the BJH (Barrett, Joyner and Halenda) model applied on the desorption Branch. d mmol of ligand/g of material calculated with the % obtained by elemental analysis.