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Table 2 Structural properties of the mesoporous silica products

From: Ordered mesoporous silica prepared by quiescent interfacial growth method - effects of reaction chemistry

Sample d100spacinga(nm) a0b(nm) wBJHc(nm) Wall thicknessd(nm) SBET(m2/g) Vtotf(cm3/g)
MSF 3.72 4.3 2.35 1.95 1,008 0.64
MS7       
  0.2 NA 4.60 5.31 3.01 2.30 624 0.43
  0.5 NA 4.70 5.42 2.97 2.45 560 0.40
  1 NA 3.42 3.95 2.5, 3.8i 0.92 1,454 1.26
  2 NA 3.20 3.69 2.90 0.30 799 0.62
  3.34 NA 4.34 5.01 2.86 1.48 887 0.54
MS12       
  1 SA 3.27 3.78 2.49 0.78 1,506 0.98
  2 SA 3.42 3.95 2.56 0.86 1,504 0.96
  3.34 SAg       
  MS4 3.64 to 7.21 4.3 to 8.3 3.70 1.73 (1.91e) 475 0.28
  MS6b 4.10 4.73 2.64 1.46 299 0.16
  MS5a h h 3.00 - 375 0.24
  MS5b 6.15 7.10 3.70 2.45 (2.85e) 199 0.17
  1. aCalculated from 2θ value corresponding to the (100) peak in the XRD pattern using Braggs law; b a 0 = d 100 × 4 / 3 ; cBJH pore diameter calculated from the desorption isotherm; dFor poorly ordered materials wall thickness = d100 − wBJH, the better order samples (MSF, 0.1 NA and 0.2 NA) are calculated as a0 − wBJH; eEstimated from TEM images; fSingle-point total pore volume at p/po = 0.995; gNo growth was observed with this molar value of sulfuric acid over the growth period; hNot determined from XRD graph; iBimodal pore size distribution.