The DOI matches its Crossref record; 11 of the 11 references it cites were found in a registry or an index.
Alumination and Ion Exchange of Mesoporous SBA-15 Molecular Sieves
Abstract
Mesoporous silica SBA-15 molecular sieve has been synthesized and incorporated with aluminum via three different postsynthesis procedures by reacting SBA-15 with AlCl 3 in dry ethanol (route 1), with aluminum isopropoxide in dry hexane (route 2) and with an aqueous solution of sodium aluminate (route 3) followed by calcination. Characterization by transmission electron microscopy, N 2 adsorption, electron probe microanalysis, powder X-ray diffraction, 27 Al magic-angle-spinning NMR, and electron spin resonance spectroscopies has been carried out to evaluate the efficiency of these alumination methods and their effect on the pore structure and ion exchange capacity of SBA-15. The Si/Al ratios in the resulting materials are in close agreement with the composition in the postsynthesis mixtures over a range of 40−10, indicating that the aluminum is mostly incorporated into silica SBA-15. The silanol groups on the internal wall surfaces of SBA-15 are suggested to be the sites for aluminum incorporation. The incorporation procedure has a strong effect on the aluminum coordination, pore structure and ion exchange capacity of the resulting materials. At comparable Si/Al ratios around 20, the percentage of aluminum with tetrahedral symmetry in the synthesized materials is about 100% (route 3) > 76% (route 1) > 71% (route 2), indicating that alumination by aqueous sodium aluminate is most effective. This is probably due to the presence of Na + ions which balance the negative charges associated with tetrahedral aluminums. The BET specific surface areas are 85% (route 1) > 60% (route 2) > 42%(route 3), showing that alumination by AlCl 3 in ethanol best maintains the mesoporous structure of SBA-15. Electron-spin resonance reveals a linear dependence of the Cu(II) ion exchange capacity on the tetrahedral aluminum content of the aluminum-containing SBA-15 materials. This suggests that the incorporated aluminums in the tetrahedral framework do serve as ion exchange sites.
Overview
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cites
Sing, K. S. W. (1985) · Pure and Applied Chemistry · doi:10.1351/pac198557040603 · Cited by 24,485
Ordered mesoporous molecular sieves synthesized by a liquid-crystal template mechanism
Kresge, C. T., Leonowicz, M. E., Roth, W. J., Vartuli, J. C., & Beck, J. S. (1992) · Nature · doi:10.1038/359710a0 · Cited by 16,275
Barrett, E. P., Joyner, L. G., & Halenda, P. P. (1951) · Journal of the American Chemical Society · doi:10.1021/ja01145a126 · Cited by 13,172
Triblock Copolymer Syntheses of Mesoporous Silica with Periodic 50 to 300 Angstrom Pores
Zhao, D., Feng, J., Huo, Q., Melosh, N., Fredrickson, G. H., Chmelka, B. F., & Stucky, G. D. (1998) · Science · doi:10.1126/science.279.5350.548 · Cited by 11,753
Self-citationRollmann, L. D., Valyocsik, E. W., & Shannon, R. D. (1984) · Inorganic Syntheses · doi:10.1002/9780470132531.ch12 · Cited by 3,373
The electronic properties and stereochemistry of mono-nuclear complexes of the copper(II) ion
Hathaway, B. J., & Billing, D. E. (1970) · Coordination Chemistry Reviews · doi:10.1016/s0010-8545(00)80135-6 · Cited by 2,668
Studies on mesoporous materials
Chen, C.-Y., Li, H.-X., & Davis, M. E. (1993) · Microporous Materials · doi:10.1016/0927-6513(93)80058-3 · Cited by 943
Acidity and Stability of MCM-41 Crystalline Aluminosilicates
Corma, A., Fornes, V., Navarro, M. T., & Perezpariente, J. (1994) · Journal of Catalysis · doi:10.1006/jcat.1994.1243 · Cited by 637
Post-synthesis grafting of Al onto MCM-41
Mokaya, R. (1997) · Chemical Communications · doi:10.1039/a705340a · Cited by 153
Tanev, P. T., & Vlaev, L. T. (1993) · Journal of Colloid and Interface Science · doi:10.1006/jcis.1993.1374 · Cited by 109
Cited by
Characterization of the porous structure of sba-15
Kruk, M., Jaroniec, M., Ko, C. H., & Ryoo, R. (2000) · Chemistry of Materials · doi:10.1021/cm000164e · Cited by 1,409
Perspectives in catalytic applications of mesostructured materials
Trong On, D., Desplantier-Giscard, D., Danumah, C., & Kaliaguine, S. (2001) · Applied Catalysis A: General · doi:10.1016/s0926-860x(01)00842-0 · Cited by 444
Galarneau, A., Cambon, H., Di Renzo, F., & Fajula, F. (2001) · Langmuir · doi:10.1021/la0105477 · Cited by 422
Zeolite synthesis from low-cost materials and environmental applications: A review
Khaleque, A., Alam, M. M., Hoque, M., Mondal, S., Haider, J. B., Xu, B., Johir, M. A. H., Karmakar, A. K., Zhou, J. L., Ahmed, M. B., et al. (2020) · Environmental Advances · doi:10.1016/j.envadv.2020.100019 · Cited by 396
Direct Synthesis of Al−SBA-15 Mesoporous Materials via Hydrolysis-Controlled Approach
Li, Y., Zhang, W., Zhang, L., Yang, Q., Wei, Z., Feng, Z., & Li, C. (2004) · The Journal of Physical Chemistry B · doi:10.1021/jp049824j · Cited by 260
Metadata
- Authors
- Luan, Z., Hartmann, M., Zhao, D., Zhou, W., & Kevan, L.
- Venue
- Chemistry of Materials
- Publisher
- American Chemical Society (ACS)
- Published
- 1999-05-13
- Volume
- 11
- Issue
- 6
- Pages
- 1621-1627
- ISSN
- 0897-4756 (ISSN-L)
- 1520-5002
- OpenAlex
- W2046468736
- Cited by
- 408
- References
- 11
- FWCI
- 12.58
- Type
- journal article
- Language
- en
- Open access
- closed
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
