Research Article
Sol-Gel Synthesis of TiO2 Nanocrystalline Particles with Enhanced Surface Area through the Reverse Micelle Approach
Table 2
Structural and morphological parameters of the TiO2 samples treated at 500°C for 1 h.
| Sample | Phase | Crystallite size (nm) | Density (g·cm−3) | BET surface area (m2·g−1) | Particle size2 (nm) |
| R0 | Anatase | 15.3 ± 0.2 | 3.51 ± 0.02 | 101.6 ± 0.6 | 15.8 ± 0.1 | R1 | Anatase | 17 ± 2 | 3.51 ± 0.02 | 88.0 ± 0.5 | 22.9 ± 0.1 | R2 | Anatase | 15 ± 2 | 3.66 ± 0.02 | 104.6 ± 0.5 | 15.6 ± 0.1 | R15 | Anatase1 | 15 ± 1 | 3.63 ± 0.02 | 116.0 ± 0.5 | 14.2 ± 0.1 | R24 (W10) | Anatase1 | 13.6 ± 0.2 | 3.67 ± 0.01 | 123.1 ± 0.4 | 13.3 ± 0.1 | W5 | Anatase | 13.7 ± 0.2 | 3.75 ± 0.02 | 126.6 ± 0.7 | 12.9 ± 0.1 | W2 | Anatase | 13.4 ± 0.1 | 3.62 ± 0.06 | 121.2 ± 0.3 | 13.1 ± 0.1 |
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1Some brookite phase is present (<5% weight). 2Calculated under the assumption of spherical symmetry according to equation ( 1). |