Journal of Inorganic Materials, Volume. 39, Issue 4, 390(2024)
Figures & Tables(16)
1. (a) XRD patterns, (b) Raman spectra, (c) N2 adsorption-desorption isotherms, and (d) pore size distributions of AC, AC-S, and AC-N
2. (a) Amounts of surface functional groups and (b) FT-IR spectra of AC, AC-S, and AC-N
S3. (a) C1s XPS spectra and (b) relative contents of oxygen-containing functional groups for AC, AC-S and AC-N
3. (a) Breakthrough curves and (b) saturation adsorption capacity for the adsorption of styrene by AC, AC-S, and AC-N
4. Adsorption kinetics of (a) AC, (b) AC-S and (c) AC-N, and (d) correspoding adsorption isotherm fitting
5. Configurations of (a-d) styrene interacting with hydroxyl group, (e-h) styrene interacting with lactone group, and (j-m) styrene interacting with the carboxyl group
6. (a) Section view and (b) ELF of optimal adsorption configuration of styrene on the lactone group
7. Adsorption mechanism of interaction between styrene and lactone group on activated carbon
Table 1. Textural characteristics of AC, AC-S, and AC-N
View tableView in ArticleTable 1. Textural characteristics of AC, AC-S, and AC-N
Sample SBET/ (m2•g-1) Vmicro/ (cm3•g-1) Vmeso/ (cm3•g-1) Vtotal/ (cm3•g-1) AC 485.51 0.12 0.21 0.33 AC-S 558.10 0.14 0.24 0.38 AC-N 348.88 0.06 0.21 0.27
Table 1. Kinetic parameters of styrene adsorption by AC, AC-S, and AC-N
View tableView in ArticleTable 1. Kinetic parameters of styrene adsorption by AC, AC-S, and AC-N
Sample PFO PSO qe/(mg•g-1) k1/min-1 R2 qe/(mg•g-1) k2/(g•mg-1•min-1) R2 AC 123 0.0041 0.99 184 1.59×10-5 0.99 AC-S 319 0.0015 0.99 548 1.59×10-6 0.99 AC-N 338 0.0014 0.99 595 1.29×10-6 0.99
Table 2. Fitting parameters of the Langmuir and Freundlich models for styrene adsorption
View tableView in ArticleTable 2. Fitting parameters of the Langmuir and Freundlich models for styrene adsorption
Isotherm model Parameter AC AC-S AC-N Langmuir qe/(mg•g-1) 239 317 281 KL/(m3•mg-1) 0.25 0.40 0.42 R2 0.98 0.99 0.97 RMSE 3.53 3.86 5.39 Freundlich KF/((mg•g-1)·(m3•mg-1)1/n) 59.82 122.75 102.76 n 2.06 2.63 2.69 R2 0.99 0.95 0.93 RMSE 2.73 7.74 8.52
Table 3. Amounts of surface functional groups of AC, AC-S, and AC-N
View tableView in ArticleTable 3. Amounts of surface functional groups of AC, AC-S, and AC-N
Sample Hydroxyl group/(mmol•g-1) Lactone group/(mmol•g-1) Carboxyl group/(mmol•g-1) Total/(mmol•g-1) AC 0.10 0.01 0.02 0.13 AC-S 0.21 0.82 0.15 1.18 AC-N 0.14 0.63 0.37 1.14
Table 4. XPS results of C1s on the surface of AC, AC-S, and AC-N
View tableView in ArticleTable 4. XPS results of C1s on the surface of AC, AC-S, and AC-N
Sample Relative content/% C - CC - OC=O/COOH O - C=OAC 70.67 20.99 2.91 5.43 AC-S 65.14 16.56 4.99 13.32 AC-N 72.94 6.70 14.57 5.79
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Guangyu WU, Song SHU, Hongwei ZHANG, Jianjun LI.
Paper Information
Category:
Received: Oct. 13, 2023
Accepted: --
Published Online: Jul. 8, 2024
The Author Email: LI Jianjun (jjli@scu.edu.cn)
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