Journal of Inorganic Materials, Volume. 38, Issue 5, 521(2023)
Figures & Tables(13)
1. XRD patterns of Ti3C2Tx MXene, FeMX0.5-1, FeMX1-1 and FeMX2-1 samples (b) Enlarged XRD patterns of (002) crystalline
2. (a) Diagram of Ti3C2Tx MXene doped with Fe3O4; SEM images of (b)Ti3AlC2, (c)Ti3C2Tx and (d) FeMX1-1 sample; (e)Elements distributions of FeMX1-1 sample
3. Nitrogen adsorption-desorption isotherms of different FeMX samples
4. (a) XPS spectra of FeMX before and after doping; (b) O1s and (c) Ti2p spectra of MXene materials; (d) Fe2p, (e) O1s and (f) Ti2p spectra of FeMX composite
5. Pb(II) adsorption properties of FeMX1-1 at different temperatures
6. (a) Adsorption isotherms and (b) adsorption kinetics curves of FeMX with different doping ratios
7. (a) XPS spectra of FeMX before and after Pb (II) adsorption ; (b) Pb4f and (c) O1s spectra of FeMX1-1 sample after Pb(II) adsorption; (d)Na1s spectra of FeMX1-1 sample before and after Pb(II) adsorption
S2. Effects of pH and ionic strength on Pb(II) adsorption capacity of FeMX2-1
Table 1. Fitting parameters of Langmuir and Freundlich isothermal adsorption models for Pb (II) adsorption by FeMX1-1 at different temperatures
View tableView in ArticleTable 1. Fitting parameters of Langmuir and Freundlich isothermal adsorption models for Pb (II) adsorption by FeMX1-1 at different temperatures
Temperature Langmiur Freundlich KL Qm/(mg·g-1) R2 KF n R2 30 ℃ 0.05 110.54 0.8327 32.80 0.20 0.9881 40 ℃ 0.21 126.04 0.8854 76.09 0.12 0.9435 50 ℃ 0.29 120.24 0.9190 62.61 0.09 0.9934
Table 2. Fitting parameters of Langmuir and Freundlich isothermal adsorption models for Pb (II) adsorption by FeMX with different doping ratios
View tableView in ArticleTable 2. Fitting parameters of Langmuir and Freundlich isothermal adsorption models for Pb (II) adsorption by FeMX with different doping ratios
Absorbance Langmiur Freundlich KL Qm/(mg·g-1) R2 KF n R2 MXene 0.0177 110.23 0.86006 15.8026 0.30 0.9106 FeMX0.5-1 0.1652 149.63 0.99028 67.9776 0.14 0.90833 FeMX1-1 0.2781 126.04 0.88536 76.0907 0.09 0.94345 FeMX2-1 0.0139 210.54 0.97478 22.1793 0.36 0.91117
Table 3. Fitting parameters of pseudo-first-order and pseudo-second-order kinetic adsorption models for Pb (II) adsorption by FeMX composites with different doping ratios
View tableView in ArticleTable 3. Fitting parameters of pseudo-first-order and pseudo-second-order kinetic adsorption models for Pb (II) adsorption by FeMX composites with different doping ratios
Absorbance Pseudo first-order reaction Pseudo second-order reaction k1/min-1 Qe/(mg·g-1) R2 k2/(g·(mg·min) -1) Qe/(mg·g-1) R2 MXene 2.0966 104.22 0.98786 0.4378 108.85 0.99402 FeMX0.5-1 0.6308 173.65 0.95009 0.0039 201.10 0.98103 FeMX1-1 0.7447 148.66 0.90406 0.0053 171.57 0.95077 FeMX2-1 1.1093 184.59 0.97027 0.0076 204.46 0.99135
Table 4. Comparison of Pb(II) adsorption properties of existing adsorption materials and FeMX
View tableView in ArticleTable 4. Comparison of Pb(II) adsorption properties of existing adsorption materials and FeMX
Absorbance Condition Adsorption property/ (mg·g-1) Ref. Zeolite A based on blast furnace slag Shake for 60 min at room temperature, C0=50 mg/L 39.37 [S1] MXene (Ti3C2Tx) T=293 K, pH 6, C0=2 mg/L, 2 min contact time ~90 [S2] Bead-supported MnFe2O4 nanoparticles T=298 K, pH 5, C0= 20 mg/L, 2 h equilibrium time 11.98 [S3] Polyhydroxyl-aluminum T=298 K, shake for 270 min, C0=1500 mg/L, 150 min equilibrium time 3.99 [S4] Peanut shell-based biochar T=293 K, pH 5.5, C0=100 mg/L, 180 min contact time 56.5 [S5] MnO2 modified magnetic graphitic carbon nitride composite T=298 K, pH 6, C0=250 mg/L, shake for 270 min 187.6 [S6] FeMX2-1 T=313 K, pH 6, C0=500 mg/L, 3 h equilibrium time 210.54 This work
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Shiyi WANG, Aihu FENG, Xiaoyan LI, Yun YU.
Paper Information
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Received: Oct. 25, 2022
Accepted: --
Published Online: Oct. 17, 2023
The Author Email: LI Xiaoyan (lixiaoyan@usst.edu.cn), YU Yun (yunyush@mail.sic.ac.cn)
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