Table 3. Low-Pressure N2 Adsorption Isotherm Type, Hysteresis Pattern, Pore Structures, and Results of Surface Area Derived from Different Methods.
| surface area (m2/g) |
|||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| sample no. | single-point BET | multipoint BET | Langmuir | BJH | DH | t-method external | t-method micropore | DR | DFT | adsorption isotherm type | hysteresis pattern | pore structures | pore types |
| JHK-1 | 13.38 | 13.95 | 22.6 | 7.32 | 7.40 | 9.95 | 4.00 | 38.99 | 10.19 | type II | H1 | open-end cylinder | cylindrical |
| JHK-2 | 7.97 | 8.24 | 13.24 | 4.81 | 4.86 | 8.24 | 25.72 | 6.66 | type II | H2 | open condensate | cylindrical-slit wide openings | |
| JHK-3 | 12.97 | 13.3 | 20.11 | 3.67 | 3.71 | 6.53 | 6.77 | 23.30 | 13.05 | type II | H1 | open-end cylinder | cylindrical |
| JHK-4 | 1.38 | 1.38 | 2.75 | 0.34 | 0.38 | 0.57 | 0.81 | 2.61 | 0.67 | type II | H1 | open-end cylinder | cylindrical |
| JHK-5 | 1.53 | 2.60 | 2.10 | 0.48 | 0.51 | 1.40 | 1.20 | 0.08 | 3.46 | type II | H1 | open-end cylinder | cylindrical |
| JHK-6 | 2.88 | 3.07 | 4.87 | 2.03 | 2.06 | 3.07 | 6.30 | 3.96 | type II | H1 | open-end cylinder | cylindrical | |
| JHK-7 | 8.93 | 9.15 | 14.49 | 4.36 | 4.40 | 3.73 | 1.42 | 25.64 | 8.20 | type II | H1 | open-end cylinder | cylindrical |
| JHK-8 | 6.29 | 6.53 | 10.83 | 3.10 | 3.13 | 5.64 | 0.88 | 6.46 | 5.22 | type II | H1 | open-end cylinder | cylindrical |
| JHK-9 | 8.92 | 9.35 | 16.14 | 5.18 | 5.23 | 7.10 | 2.25 | 8.96 | 8.22 | type II | H2 | open-interconnected | slit |
| JHK-10 | 5.09 | 9.11 | 47.41 | 4.89 | 4.95 | 5.13 | 3.98 | 19.02 | 3.61 | type II | H1 | open-end cylinder | cylindrical |
| JHK-11 | 7.25 | 8.59 | 2.04 | 6.02 | 6.09 | 8.18 | 0.41 | 2.64 | 5.22 | type II | H1 | combined interconnected | combined pores |
| JHK-12 | 8.17 | 9.29 | 19.54 | 6.04 | 6.10 | 8.14 | 1.15 | 27.94 | 5.90 | type II | H2 | open end—slit | large condensate pore |
| JHK-13 | 3.38 | 3.75 | 6.69 | 2.94 | 2.97 | 3.75 | 12.52 | 3.40 | type II | H2 | open end—slit | medium condensate pore | |
| JHK-14 | 5.38 | 7.98 | 24.35 | 6.59 | 6.66 | 5.88 | 2.10 | 22.68 | 3.84 | type II | H1 | combined interconnected | combined pores |
| JHK-15 | 10.91 | 11.26 | 18.05 | 5.98 | 6.04 | 8.53 | 2.73 | 21.98 | 9.48 | type II | H2 | open-interconnected | slit |