The Photocatalytic Activity of CaTiO3 Derived from the Microwave-Melting Heating Process of Blast Furnace Slag
Abstract
:1. Introduction
2. Materials and Methods
2.1. Material Preparation
2.2. Experimental Design of Photocatalysis
2.3. Instrumental Characterization
2.4. First-Principles Theoretical Analysis
3. Results and Discussion
3.1. Characterization
3.2. Photocatalytic Performance of MM-CaTiO3
3.3. Degradation Mechanism of MB Using MM-CaTiO3
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Materials | Titanium-Bearing Blast Furnace Slag | MM-CaTiO3 | Pristine CaTiO3 | |
---|---|---|---|---|
Space group|number | Pnma|62 | Pbnm|62 | Pm-3m|221 | Pbnm|62 |
a(Å) | 5.4424 | 5.3796 | 3.7950 | 5.3780 |
b(Å) | 7.6417 | 5.4423 | 3.7950 | 5.4440 |
c(Å) | 5.3807 | 7.6401 | 3.7950 | 7.6370 |
α/β/γ(°) | 90.0000 | 90.0000 | 90.0000 | 90.0000 |
Z | 4.00 | 4.00 | 1.00 | 4.00 |
(h k l) | (121) | (112) | (110) | (112) |
d(Å) | 2.7025 | 2.7030 | 2.6835 | 2.7030 |
Lattice Plane | (112) | (110) |
---|---|---|
Molecular model | ||
Epure | −609.95 eV | −595.48 eV |
Eov-1 | −601.76 eV | −587.59 eV |
Oxygen vacancy formation energy | 8.152 eV | 7.852 eV |
Model | Equation | R2 |
---|---|---|
Zero-order reaction kinetics | Ct = −0.5220 t + 3.0770 | 0.98422 |
First-order reaction kinetics | ln(Ct/C0) = −0.2358 t − 0.2364 | 0.99902 |
Second-order reaction kinetics | 1/Ct = 0.0998 t + 0.3101 | 0.98969 |
Raw Material | Synthesis Method | Band Gap | Ref. |
---|---|---|---|
Calcium carbonate and titanium dioxide. | Calcium carbonate and titanium dioxide are firstly mixed and then calcined at 1400 °C for 2 h. | 3.50 eV | [44] |
Titanium isoprenoid, calcium acetate and nitric acid. | The Ca2+/TiO2 sol is first synthesized using calcium acetate, nitric acid and titanium isoprenoid, and then aging and calcined after freeze-drying. | 3.44 eV | [18] |
Ti(C4H9O)4, AgNO3, and CH3COOH. | Ag-doped TiO2 NPs were synthesized by sol–gel technology. | 2.67 eV | [27] |
C12H28O4Ti, Cu(NO3)2, CH3COOH, C3H7OH, and NaBH4. | Cu(NO3)2 is added to the ultrasonically dispersed TiO2 NPs aqueous suspension and magnetically stirred. Subsequently, add NaBH4 solution and continue stirring for 24 h. Finally, centrifuge, wash, and dry. | 2.40 eV | [28] |
TiO2 (001), TiO2 (100), TiO2 (101), and Cu(NO3)2 (0.1 mol/L). | CuOx/TiO2 catalysts were synthesized by the initial impregnation method using TiO2 (001), TiO2 (100) and TiO2 (101) as the vector and Cu(NO3)2 (0.1 mol/L) solution as the load. | 2.25 eV | [45] |
Titanium-bearing blast furnace slag. | Melting pretreatment at 1300 °C for 1 h and then roasted in a microwave field at 1200 °C with a heating time of 20 min. | 2.25 eV | This study |
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Xie, J.; Ye, Q.; Zhou, J.; Liao, Y.; Qian, G. The Photocatalytic Activity of CaTiO3 Derived from the Microwave-Melting Heating Process of Blast Furnace Slag. Nanomaterials 2023, 13, 1412. https://doi.org/10.3390/nano13081412
Xie J, Ye Q, Zhou J, Liao Y, Qian G. The Photocatalytic Activity of CaTiO3 Derived from the Microwave-Melting Heating Process of Blast Furnace Slag. Nanomaterials. 2023; 13(8):1412. https://doi.org/10.3390/nano13081412
Chicago/Turabian StyleXie, Jun, Qing Ye, Jianghao Zhou, Yue Liao, and Gongming Qian. 2023. "The Photocatalytic Activity of CaTiO3 Derived from the Microwave-Melting Heating Process of Blast Furnace Slag" Nanomaterials 13, no. 8: 1412. https://doi.org/10.3390/nano13081412