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风轻云淡278

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专业: 高分子合成化学

[交流] 【求助】BJH孔径分布数据分析已有1人参与

做了BET，拷回来的数据很奇怪，做不了文献里那样的孔径分布图（Pore Volume
(cm³/g.nm) 对 pore diameter(nm) ）,
刚才看了下，这里似乎缺了一组数据， dV/dD，单位是(cm³/g.nm)
请问根据现有数据，如何计算得到呢？
我用Incremental Pore Volume除以pore diameter，作图，好像与给的图不一样。

另外给的孔容有好几组数据，用哪一个呢？

原始数据
Pore Volume
Single point adsorption total pore volume of pores
less than 79.2912 nm diameter at P/Po = 0.974965336: 0.168748 cm³/g
t-Plot micropore volume: -0.016044 cm³/g
BJH Adsorption cumulative volume of pores
between 1.7000 nm and 300.0000 nm diameter: 0.183273 cm³/g
BJH Desorption cumulative volume of pores
between 1.7000 nm and 300.0000 nm diameter: 0.185250 cm³/g
Pore Size
Adsorption average pore width (4V/A by BET): 8.74742 nm
BJH Adsorption average pore diameter (4V/A): 7.5035 nm
BJH Desorption average pore diameter (4V/A): 5.0561 nm

BJH Adsorption Pore Distribution Report
Faas Correction
Halsey
t = 3.54 [ -5 / ln(P/Po) ] ^ 0.333
Diameter Range: 1.7000 nm to 300.0000 nm
Adsorbate Property Factor: 0.95300 nm
Density Conversion Factor: 0.0015468
Fraction of Pores Open at Both Ends: 0.00
Pore Diameter Range (nm)
Average Diameter (nm)
Incremental Pore Volume (cm³/g)
Cumulative Pore Volume (cm³/g)
Incremental Pore Area (m²/g)
Cumulative Pore Area (m²/g)
399.7 - 216.5 257.6 0.006093 0.006093 0.095 0.095
216.5 - 100.6 120.7 0.006619 0.012712 0.219 0.314
100.6 - 78.9 87.1 0.002671 0.015383 0.123 0.437
78.9 - 40.9 48.7 0.006904 0.022287 0.567 1.004
40.9 - 27.3 31.4 0.007063 0.029350 0.899 1.903
27.3 - 20.5 22.9 0.009493 0.038843 1.660 3.563
20.5 - 16.4 18.0 0.011523 0.050366 2.566 6.129
16.4 - 13.7 14.8 0.012729 0.063095 3.445 9.575
13.7 - 11.4 12.3 0.015414 0.078510 5.010 14.584
11.4 - 10.2 10.7 0.010212 0.088721 3.813 18.398
10.2 - 8.1 8.9 0.021096 0.109817 9.506 27.904
8.1 - 6.7 7.2 0.016404 0.126221 9.072 36.975
6.7 - 5.7 6.1 0.012464 0.138685 8.212 45.187
5.7 - 4.9 5.2 0.009805 0.148490 7.549 52.736
4.9 - 4.2 4.5 0.007804 0.156293 6.927 59.663
4.2 - 3.7 3.9 0.005996 0.162289 6.076 65.739
3.7 - 3.3 3.5 0.004894 0.167183 5.609 71.349
3.3 - 2.9 3.1 0.003887 0.171070 5.011 76.359
2.9 - 2.6 2.8 0.003486 0.174556 5.043 81.403
2.6 - 2.3 2.5 0.003007 0.177563 4.886 86.288
2.3 - 2.1 2.2 0.002425 0.179988 4.431 90.720
2.1 - 1.8 1.9 0.002213 0.182201 4.572 95.292
1.8 - 1.7 1.8 0.001072 0.183273 2.407 97.699
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