Table 2

Structural properties of the mesoporous silica products
Sample d100 spacinga (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

aCalculated from 2θ value corresponding to the (100) peak in the XRD pattern using Braggs law; b<a onClick="popup('http://www.nanoscalereslett.com/content/8/1/484/mathml/M1','MathML',630,470);return false;" target="_blank" href="http://www.nanoscalereslett.com/content/8/1/484/mathml/M1">View MathML</a>; 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.

Alsyouri et al.

Alsyouri et al. Nanoscale Research Letters 2013 8:484   doi:10.1186/1556-276X-8-484

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