Sample Designations SSA (m²/g) D BETnm Color
T1 54.00 ± 0.80 50.28 Gray
T2 74.08 ± 0.32 36.65 Brown
T3 296.40 ± 0.55 9.16 White
T4 274.64 ± 0.60 9.89 White
T5 230.63 ± 0.27 11.77 White
T6 69.57 ± 0.96 39.03 Brown
T7 250.49 ± 0.48 10.84 White
T8 228.03 ± 0.76 11.91 White
T9 216.91 ± 0.16 12.52 White
T10 83.45 ± 0.93 32.54 Brown
T11 330.63 ± 0.68 8.21 White
T12 296.40 ± 1.02 9.16 White
T13 250.73 ± 0.45 10.83 White
Table 2: Values of specific surface area obtained by BET, average size of the particles (D BET) and color of the samples