Tuning the Pore Geometry of Ordered Mesoporous Carbons for Enhanced Adsorption of Bisphenol-A
Abstract
:1. Introduction
2. Results and Discussion
2.1. Characterization of the Adsorbents
Material | Specific Surface Area (m2/g) | Pore Volume (cm3/g) | Pore diameter D (nm) | Unit cell parameter a a0 (nm) | Wall thickness a (nm) |
---|---|---|---|---|---|
PAC | 1027 | 0.50 | <3 | - | - |
CMK-3 | 1420 | 1.14 | 4.0 | 9.6 | 5.6 |
SMC | 476 | 0.49 | 7.0 | 11.6 | 4.6 |
Material | Elemental analysis [wt %] | |||
---|---|---|---|---|
C | H | N | O | |
PAC | 85.90 | 0.45 | 0.29 | 13.36 |
CMK-3 | 93.33 | 0.68 | 0.07 | 5.92 |
SMC | 93.93 | 0.50 | 0.08 | 5.49 |
2.2. Adsorption Isotherms
Material | Experimental | Langmuir | Freundlich | |||||
---|---|---|---|---|---|---|---|---|
qmax (mg/g) | Adsorbed BPA (molecules/nm2) | qmax (mg/g) | KL (L/mg) | R2 | 1/n | KF (mg/g (L/mg)1/n) | R2 | |
PAC | 290 | 0.75 | 307 | 0.64 | 0.98 | 0.14 | 181 | 0.93 |
CMK-3 | 474 | 0.88 | 447 | 2.81 | 0.82 | 0.12 | 296 | 0.99 |
SMC | 154 | 0.86 | 156 | 0.40 | 0.87 | 0.19 | 74 | 0.98 |
2.3. Adsorption Kinetics
Material | Pseudo-first-order model | Pseudo-second-order model | Weber-Morris | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
qe (exp) (mg/g) | qe (calc) (mg/g) | k1 (1/min) | R2 | qe (calc) (mg/g) | k2 (g/(mg∙min) | t1/2 (min) | R2 | kd (min∙g/(mg)) | C (mg/g) | R2 | |
PAC | 277 | 264 | 0.0657 | 0.98 | 315 | 0.00024 | 13.4 | 0.99 | 31.2 | 13.2 | 0.94 |
CMK-3 | 295 | 281 | 2.64 | 0.77 | 291 | 0.01647 | 0.208 | 0.96 | 13.7 | 215 | 0.65 |
SMC | 147 | 137 | 0.0236 | 0.97 | 149 | 0.00157 | 4.27 | 0.99 | 15.0 | 29.6 | 0.86 |
PAC | kd (min∙g/mg) | C | R2 | SMC | kd (min∙g/mg) | C | R2 |
---|---|---|---|---|---|---|---|
62–88 µm | 31.2 | 13.2 | 0.94 | 62–88 µm | 15.0 | 29.6 | 0.86 |
177–250 µm | 20.9 | −3.93 | 0.99 | 177–250 µm | 13.5 | 6.10 | 0.97 |
510–700 µm | 7.62 | −6.68 | 0.98 | 510–700 µm | 8.33 | 2.60 | 0.99 |
3. Experimental Section
3.1. Synthesis of Ordered Mesoporous Carbons
3.2. Characterization
3.3. Adsorption Tests
4. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Libbrecht, W.; Vandaele, K.; De Buysser, K.; Verberckmoes, A.; Thybaut, J.W.; Poelman, H.; De Clercq, J.; Van Der Voort, P. Tuning the Pore Geometry of Ordered Mesoporous Carbons for Enhanced Adsorption of Bisphenol-A. Materials 2015, 8, 1652-1665. https://doi.org/10.3390/ma8041652
Libbrecht W, Vandaele K, De Buysser K, Verberckmoes A, Thybaut JW, Poelman H, De Clercq J, Van Der Voort P. Tuning the Pore Geometry of Ordered Mesoporous Carbons for Enhanced Adsorption of Bisphenol-A. Materials. 2015; 8(4):1652-1665. https://doi.org/10.3390/ma8041652
Chicago/Turabian StyleLibbrecht, Wannes, Koen Vandaele, Klaartje De Buysser, An Verberckmoes, Joris W. Thybaut, Hilde Poelman, Jeriffa De Clercq, and Pascal Van Der Voort. 2015. "Tuning the Pore Geometry of Ordered Mesoporous Carbons for Enhanced Adsorption of Bisphenol-A" Materials 8, no. 4: 1652-1665. https://doi.org/10.3390/ma8041652