Spherical V-Fe-MCM-48: The Synthesis, Characterization and Hydrothermal Stability
Abstract
:1. Introduction
2. Results and Discussion
2.1. Mesoporous Structure of V-Fe-MCM-48 Sample
2.1.1. XRD
2.1.2. Nitrogen Adsorption-Desorption
Sample | V/Si a | V/Si b | Fe/Si a | Fe/Si b | d211 | a0 c | dp d | as, BET | tw e | Vp |
---|---|---|---|---|---|---|---|---|---|---|
(Molar Ratio) | (Molar Ratio) | (Molar Ratio) | (Molar Ratio) | (nm) | (nm) | (nm) | (m2/g) | (nm) | (cm3/g) | |
Si-MCM-48 | — | — | — | — | 3.59 | 8.80 | 2.39 | 1369.4 | 1.65 | 0.832 |
V-Fe-MCM-48 | 0.0296 | 0.0066 | 0.0062 | 0.0021 | 3.81 | 9.33 | 2.46 | 1213.2 | 1.79 | 0.777 |
2.1.3. SEM and TEM
2.2. Statues of Heteroatoms
2.2.1. UV-Vis
2.2.2. XPS
2.3. Hydrothermal Stability Test
Time (h) | MCM-48 | V-Fe-MCM-48 | ||||
---|---|---|---|---|---|---|
d211 (nm) | a0 a (nm) | V/Si a (Molar Ratio) | Fe/Si b (Molar Ratio) | d211 (nm) | a0 a (nm) | |
0 | 3.59 | 8.80 | 0.0296 | 0.0066 | 3.81 | 9.33 |
24 | 3.56 | 8.72 | 0.0107 | 0.0041 | 3.70 | 9.06 |
48 | – | – | 0.0079 | 0.0028 | 3.68 | 9.01 |
72 | – | – | 0.0062 | 0.0021 | 3.56 | 8.72 |
96 | – | – | 0.0048 | 0.0014 | – | – |
3. Experimental Section
3.1. Materials
3.2. Synthesis of the Samples
3.3. Characterization
3.4. Hydrothermal Stability Test
4. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Qian, W.; Wang, H.; Chen, J.; Kong, Y. Spherical V-Fe-MCM-48: The Synthesis, Characterization and Hydrothermal Stability. Materials 2015, 8, 1752-1765. https://doi.org/10.3390/ma8041752
Qian W, Wang H, Chen J, Kong Y. Spherical V-Fe-MCM-48: The Synthesis, Characterization and Hydrothermal Stability. Materials. 2015; 8(4):1752-1765. https://doi.org/10.3390/ma8041752
Chicago/Turabian StyleQian, Wang, Haiqing Wang, Jin Chen, and Yan Kong. 2015. "Spherical V-Fe-MCM-48: The Synthesis, Characterization and Hydrothermal Stability" Materials 8, no. 4: 1752-1765. https://doi.org/10.3390/ma8041752