Keggin-Al13 Polycations: Influence of Synthesis and Intercalation Parameters on the Structural Properties of Al-Pillared Clays
Abstract
:1. Introduction
2. Materials and Methods
2.1. Synthesis of the Pillaring Agent under Different Temperatures
2.2. Evaluation of the Intercalation Time
2.3. Diluted Pillaring Solutions and Re-Pillaring Procedures
2.4. Characterization Techniques
3. Results and Discussion
3.1. Influence of Temperature in the Synthesis of the Pillaring Agent
3.2. Influence of the Intercalation Time
3.3. Control of Pillar Insertion
4. Conclusions
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Sample | d001 1 (nm) | SBET 2 (m2/g) | Sext 3 (m2/g) | Vµ 4 (cm3/g) | TPV 5 (cm3/g) | Si/Al 6 |
---|---|---|---|---|---|---|
CN-1 | 1.57 | 90 | 42 | 0.03 | 0.13 | 2.48 |
25/25 | 1.75 | 226 | 95 | 0.07 | 0.15 | 1.77 |
60/60 | 1.71 | 224 | 79 | 0.07 | 0.15 | 1.77 |
60/25 | 1.75 | 224 | 79 | 0.07 | 0.15 | 1.77 |
Sample | d001 1 (nm) | SBET 2 (m2/g) | Sext 3 (m2/g) | Vµ 4 (cm3/g) | TPV 5 (cm3/g) | Si/Al 6 |
---|---|---|---|---|---|---|
CN-1 | 1.57 | 90 | 42 | 0.03 | 0.13 | 2.48 |
0.5 h | 1.64 | 168 | 46 | 0.06 | 0.12 | 1.76 |
1 h | 1.80 | 213 | 65 | 0.07 | 0.13 | 1.74 |
2 h | 1.75 | 226 | 95 | 0.07 | 0.15 | 1.77 |
72 h | 1.72 | 184 | 52 | 0.06 | 0.14 | 1.74 |
Sample | d001 1 (nm) | SBET 2 (m2/g) | Sext 3 (m2/g) | Sµ 4 (m2/g) | Vµ 5 (cm3/g) | TPV 6 (cm3/g) | Si/Al 7 | AlVI/AlIV 9 |
---|---|---|---|---|---|---|---|---|
CN-2 | 1.48 | 95 | 49 | 46 | 0.03 | 0.13 | 1.95 | 5.75 |
10% | 1.70 | 179 | 35 | 144 | 0.06 | 0.14 | n.d. 8 | 6.39 |
25% | 1.68 | 180 | 67 | 113 | 0.06 | 0.14 | 1.62 | 6.79 |
50% | 1.70 | 175 | 51 | 124 | 0.06 | 0.13 | 1.65 | 7.74 |
100% | 1.71 | 195 | 45 | 150 | 0.07 | 0.15 | 1.54 | 8.66 |
RP-10% | 1.66 | 154 | 64 | 90 | 0.05 | 0.17 | 1.66 | n.d. 8 |
RP-25% | 1.68 | 137 | 60 | 77 | 0.04 | 0.13 | 1.52 | n.d. 8 |
RP-50% | 1.68 | 137 | 59 | 78 | 0.04 | 0.12 | 1.57 | n.d. 8 |
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Parodia, A.; Prasniski, J.A.; Bertella, F.; Pergher, S.B.C. Keggin-Al13 Polycations: Influence of Synthesis and Intercalation Parameters on the Structural Properties of Al-Pillared Clays. Minerals 2021, 11, 1211. https://doi.org/10.3390/min11111211
Parodia A, Prasniski JA, Bertella F, Pergher SBC. Keggin-Al13 Polycations: Influence of Synthesis and Intercalation Parameters on the Structural Properties of Al-Pillared Clays. Minerals. 2021; 11(11):1211. https://doi.org/10.3390/min11111211
Chicago/Turabian StyleParodia, Anderson, Janaina A. Prasniski, Francine Bertella, and Sibele B. C. Pergher. 2021. "Keggin-Al13 Polycations: Influence of Synthesis and Intercalation Parameters on the Structural Properties of Al-Pillared Clays" Minerals 11, no. 11: 1211. https://doi.org/10.3390/min11111211