Synthesis and characterization of AlPO4-n molecular sieves from hexamethyleneimine template
Metadata of CSIR Papers
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| Title |
Synthesis and characterization of AlPO4-n molecular sieves from hexamethyleneimine template
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| Creator |
Venkatathri, N
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| Subject |
Chemistry, Multidisciplinary
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| Description |
Aluminophosphates AlPO4-5, AlPO4-16, AlPO4-22, AlPO4-31, SAPO-35 and AlPO4-L have been synthesized using hexamethyleneimine template, by a procedure different from the standard one. Gel composition Al2O3: P2O5: 1.16HEM: 45H(2)O at 24h, 473K are the standard reaction conditions for synthesis of AlPO4-5. To this, addition of excess template (1.35 M) leads to AlPO4-22. Changing the aluminium source from catapal - B to aluminium isopropoxide gives AlPO4-16. Aging for 8 h at room temperature with nonaqueous gel and stirring leads to AlPO4-31. Addition of 0.3 M SiO2 to nonaqueous AlPO gel gives SAPO-35. The aluminophosphates have been characterized by elemental analysis, XRD, SEM, FTIR,TG/DTA, and C-13 MAS NMR techniques. Elemental analysis shows that Al and P are in equi-molar composition. XRD analysis shows that the synthesized samples are highly crystalline. SEM shows the morphology change with structure. TG/DTA analysis reveals the presence of maximum five stage elimination of templates. Carbon and nitrogen analysis gives the number of templates present in a unit cell of the molecular sieves. C-13 NMR analysis shows the interaction of template with structure of the framework.
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| Publisher |
NATL INST SCIENCE COMMUNICATIONNEW DELHIDR K S KRISHNAN MARG, NEW DELHI 110 012, INDIA
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| Date |
2011-09-24T09:59:46Z
2011-09-24T09:59:46Z 2002 |
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| Type |
Article
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| Identifier |
INDIAN JOURNAL OF CHEMISTRY SECTION A-INORGANIC BIO-INORGANIC PHYSICAL THEORETICAL & ANALYTICAL CHEMISTRY
0376-4710 http://hdl.handle.net/123456789/24223 |
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| Language |
English
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