Characterization of the Structural and Gas Adsorption Properties of ETS-10 Molecular Sieve
A sample of ETS-10 was prepared and characterized by spectroscopic (Raman, UV–vis, FT-IR) and TPD techniques. An interpretation of the vibrational spectra was proposed. Absorption in the UV–vis range was typical of charge-transfer transitions involving octahedral Ti. No surface –OH groups were detec...
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| Format: | Article |
| Language: | English |
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SAGE Publishing
2003-09-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/026361703772776466 |
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| author | Giovanni Bagnasco Maria Turco Guido Busca Tiziana Armaroli Alfonso Nastro Pierantonio De Luca |
| author_facet | Giovanni Bagnasco Maria Turco Guido Busca Tiziana Armaroli Alfonso Nastro Pierantonio De Luca |
| author_sort | Giovanni Bagnasco |
| collection | DOAJ |
| description | A sample of ETS-10 was prepared and characterized by spectroscopic (Raman, UV–vis, FT-IR) and TPD techniques. An interpretation of the vibrational spectra was proposed. Absorption in the UV–vis range was typical of charge-transfer transitions involving octahedral Ti. No surface –OH groups were detected on the dehydrated sample. FT-IR measurements showed that water was adsorbed in two different molecular modes while ammonia was adsorbed coordinatively and mostly desorbed below 600 K. These results were confirmed by TPD studies that showed hydrogen-bonded water and water coordinated to Na + and K + cations located in the main channels of ETS-10. Ammonia TPD measurements on the hydrated material provided evidence for two forms of adsorbed NH 3 , both bonded to water molecules. On the anhydrous material, NH 3 was probably coordinated only to the more loosely bonded Na + and K + ions in the main channels of ETS-10. The amount of adsorbed NH 3 was markedly reduced after heat treatment that led to a partial loss of crystallinity. |
| format | Article |
| id | doaj-art-161c4bba6c174143a84e849cc9c8d387 |
| institution | Kabale University |
| issn | 0263-6174 2048-4038 |
| language | English |
| publishDate | 2003-09-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj-art-161c4bba6c174143a84e849cc9c8d3872025-01-02T02:58:23ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40382003-09-012110.1260/026361703772776466Characterization of the Structural and Gas Adsorption Properties of ETS-10 Molecular SieveGiovanni Bagnasco0Maria Turco1Guido Busca2Tiziana Armaroli3Alfonso Nastro4Pierantonio De Luca5 Dipartimento di Ingegneria Chimica, Università “Federico II” di Napoli, P. le V. Tecchio, 80125 Naples, Italy Dipartimento di Ingegneria Chimica, Università “Federico II” di Napoli, P. le V. Tecchio, 80125 Naples, Italy Dipartimento di Ingegneria Chimica e di Processo “G.B. Bonino”, Università di Genova, P. le J.F. Kennedy, 16129 Genoa, Italy Dipartimento di Ingegneria Chimica e di Processo “G.B. Bonino”, Università di Genova, P. le J.F. Kennedy, 16129 Genoa, Italy Dipartimento di Pianificazione Territoriale, Università della Calabria, Arcavacata di Rende, 87030 Cosenza, Italy Dipartimento di Pianificazione Territoriale, Università della Calabria, Arcavacata di Rende, 87030 Cosenza, ItalyA sample of ETS-10 was prepared and characterized by spectroscopic (Raman, UV–vis, FT-IR) and TPD techniques. An interpretation of the vibrational spectra was proposed. Absorption in the UV–vis range was typical of charge-transfer transitions involving octahedral Ti. No surface –OH groups were detected on the dehydrated sample. FT-IR measurements showed that water was adsorbed in two different molecular modes while ammonia was adsorbed coordinatively and mostly desorbed below 600 K. These results were confirmed by TPD studies that showed hydrogen-bonded water and water coordinated to Na + and K + cations located in the main channels of ETS-10. Ammonia TPD measurements on the hydrated material provided evidence for two forms of adsorbed NH 3 , both bonded to water molecules. On the anhydrous material, NH 3 was probably coordinated only to the more loosely bonded Na + and K + ions in the main channels of ETS-10. The amount of adsorbed NH 3 was markedly reduced after heat treatment that led to a partial loss of crystallinity.https://doi.org/10.1260/026361703772776466 |
| spellingShingle | Giovanni Bagnasco Maria Turco Guido Busca Tiziana Armaroli Alfonso Nastro Pierantonio De Luca Characterization of the Structural and Gas Adsorption Properties of ETS-10 Molecular Sieve Adsorption Science & Technology |
| title | Characterization of the Structural and Gas Adsorption Properties of ETS-10 Molecular Sieve |
| title_full | Characterization of the Structural and Gas Adsorption Properties of ETS-10 Molecular Sieve |
| title_fullStr | Characterization of the Structural and Gas Adsorption Properties of ETS-10 Molecular Sieve |
| title_full_unstemmed | Characterization of the Structural and Gas Adsorption Properties of ETS-10 Molecular Sieve |
| title_short | Characterization of the Structural and Gas Adsorption Properties of ETS-10 Molecular Sieve |
| title_sort | characterization of the structural and gas adsorption properties of ets 10 molecular sieve |
| url | https://doi.org/10.1260/026361703772776466 |
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