Journal of Inorganic Materials, Volume. 36, Issue 11, 1163(2021)
Figures & Tables(17)
2. (a, b) SEM images, (c, d) EDX elemental analyses, (e) XRD patterns and (f) TG curves of (a, c) SBA-15 and (b, d) Q-SBA-15 samples
3. (a) N2 adsorption-desorption isotherms, (b) pore size distributions of SBA-15 and Q-SBA-15, (c, d) TEM images of Q-SBA-15
4. (a) FT-IR spectra of Q-SBA-15 and SBA-15, and (b) XPS survey spectrum of Q-SBA-15
5. Effect of solution pH on the adsorption of Cr(III) with Q-SBA-15
7. Linearized fitting curves of (a) Langmuir model and (b) Freundlich model for adsorption of Cr(III) on Q-SBA-15
S1. (a) Effect of contacting time on the adsorption capacity of Cr(III) by Q-SBA-15 and (b) EDX analyses of Q-SBA-15 after adsorption of Cr(III)
S2. Fitting curves for adsorption of Cr(III) by (a) pseudo-first-order model and (b) pseudo-first-order model
S3. Plots of lnK cversus 1/T for the adsorption of Cr(III) by Q-SBA-15
Table 1. Textural properties of the synthesized samples
View tableView in ArticleTable 1. Textural properties of the synthesized samples
Sample SBET/(cm2·g-1) Pore size/nm SBA-15 757 9.6 Q-SBA-15 283 6.7
Table 1. Kinetic parameters for Cr(III) adsorption onto Q-SBA-15
View tableView in ArticleTable 1. Kinetic parameters for Cr(III) adsorption onto Q-SBA-15
Sample qe,exp/(mg·g-1) Pseudo first-order model Pseudo second-order model K1/ min-1 qe,cal/(mg·g-1) R2 K2/(g·mg-1·min-1) qe,cal/(mg·g-1) R2 Q-SBA-15 102.3 0.0647 61.75 0.857 4.26×10-4 119.19 0.979
Table 2. Comparison of Cr(III) adsorption performance with different materials selected from literature
View tableView in ArticleTable 2. Comparison of Cr(III) adsorption performance with different materials selected from literature
Adsorbent qm/(mg·g-1) References Biomass-based hydrogel 41.7 [1] m-MCM-41-NH2 36.92 [2] Graphene oxide 13.3 [3] Thiol-functionalized MCM-41 15.34 [4] TS-SBA-15 95.68 [5] NH2-SBA-15 24.88 [6] Q-SBA-15 102.3 This work
Table 2. Different model parameters for adsorption of Cr(III) by Q-SBA-15 at different temperatures
View tableView in ArticleTable 2. Different model parameters for adsorption of Cr(III) by Q-SBA-15 at different temperatures
Temperature /℃ Langmuir Freundlich qm/(g·mg-1) KL R2 KF n R2 30 106.84 0.09 0.988 24.59 3.12 0.836 40 108.23 0.25 0.997 48.39 5.47 0.913 50 112.74 0.41 0.997 42.72 4.27 0.697
Table 3. Thermodynamic parameters of Cr(III) adsorption on Q-SBA-15
View tableView in ArticleTable 3. Thermodynamic parameters of Cr(III) adsorption on Q-SBA-15
Sample Tempera- ture/K Kc ΔG/ (kJ·mol-1) ΔS/ (kJ·mol·K-1) ΔH/ (kJ·mol-1) Q-SBA-15 293 1.846 -4.386 0.128 33.118 303 2.095 -5.666 313 2.650 -6.946 318 2.780 -7.586 323 3.088 -8.226
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Yu GUO, Xiaoqing JIANG, Hongmei WU, Yu XIAO, Dafu WU, Xin LIU.
Paper Information
Category: RESEARCH ARTICLE
Received: Feb. 23, 2021
Accepted: --
Published Online: Dec. 20, 2021
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