Table 1.
Characterization of the synthetic ACC samples
| Sample description |
H2O, n (mol) from TGA |
FTIR I(ν2)/I(ν4) |
BET surface area (m2/g) |
Particle size (nm) |
||
| Type | ID | BET | SEM | |||
| Synthetic calcite | Calcite | 0 | 1.4 | 0.99 ± 0.08 | - | |
| More disordered synthetic ACC (more metastable) | ACC-1 | 1.20 ± 0.02 | 8.0 | 19.3 ± 0.2 | 192 ± 3 | - |
| ACC-2 | 1.58 ± 0.01 | 9.5 | 9.0 ± 1 | 412 ± 53 | ∼200 | |
| Less disordered Synthetic ACC (less metastable) | ACC-3 | 1.46 ± 0.01 | 6.8 | 12.1 ± 0.2 | 306 ± 6 | - |
| ACC-4 | 1.36 ± 0.01 | 6.2 | 12.5 ± 0.1 | 296 ± 3 | 150–200 | |
| ACC-5 | 1.13 ± 0.02 | 7.2 | 42.4 ± 0.2 | 86 ± 4 | 50–100 | |