Journal of Inorganic Materials ›› 2023, Vol. 38 ›› Issue (5): 521-528.DOI: 10.15541/jim20220627
Special Issue: 【能源环境】污染物去除(202312); 【信息功能】MAX层状材料、MXene及其他二维材料(202409)
• RESEARCH ARTICLE • Previous Articles Next Articles
WANG Shiyi1,2(), FENG Aihu2, LI Xiaoyan1(
), YU Yun2(
)
Received:
2022-10-25
Revised:
2022-12-02
Published:
2023-01-11
Online:
2023-01-11
Contact:
LI Xiaoyan, associate professor. E-mail: lixiaoyan@usst.edu.cn;About author:
WANG Shiyi (1996-), female, Master candidate. E-mail: wsysues051115114@163.com
CLC Number:
WANG Shiyi, FENG Aihu, LI Xiaoyan, YU Yun. Pb (II) Adsorption Process of Fe3O4 Supported Ti3C2Tx[J]. Journal of Inorganic Materials, 2023, 38(5): 521-528.
Fig. 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 Colorful figures are available on website
Fig. 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
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 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 |
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 S2 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 |
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 S3 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 |
Fig. 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 Colorful figures are available on website
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 |
Table S4 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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