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.

SamplePhaseCrystallite size (nm)Density (g·cm−3)BET surface area (m2·g−1)Particle size2 (nm)

R0Anatase15.3 ± 0.23.51 ± 0.02101.6 ± 0.615.8 ± 0.1
R1Anatase17 ± 23.51 ± 0.0288.0 ± 0.522.9 ± 0.1
R2Anatase15 ± 23.66 ± 0.02104.6 ± 0.515.6 ± 0.1
R15Anatase115 ± 13.63 ± 0.02116.0 ± 0.514.2 ± 0.1
R24 (W10)Anatase113.6 ± 0.23.67 ± 0.01123.1 ± 0.413.3 ± 0.1
W5Anatase13.7 ± 0.23.75 ± 0.02126.6 ± 0.712.9 ± 0.1
W2Anatase13.4 ± 0.13.62 ± 0.06121.2 ± 0.313.1 ± 0.1

1Some brookite phase is present (<5% weight). 2Calculated under the assumption of spherical symmetry according to equation (1).