A time resolved, in-situ X-ray diffraction study of the de-intercalation of anions and lithium cations from [LiAl2(OH)(6)](n)X center dot qH(2)O (X = Cl-, Br-, NO3-, SO42-)
The layered double hydroxides (LDHs), [LiAl2(OH) 6]nX·qH2O (Xn- = CP -, Br-, NO3,- SO42-) spontaneously lose both Li+ cations and Xn- anions to give crystalline Al(OH)3 on stirring in water. The kinetics of this topochemical de-intercalation reaction have been studied using time-resolved, in-situ en...
| Hlavní autoři: | , , , |
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| Médium: | Journal article |
| Jazyk: | English |
| Vydáno: |
2004
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| _version_ | 1826288189882499072 |
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| author | Tarasov, K Isupov, V Chupakhina, L O'Hare, D |
| author_facet | Tarasov, K Isupov, V Chupakhina, L O'Hare, D |
| author_sort | Tarasov, K |
| collection | OXFORD |
| description | The layered double hydroxides (LDHs), [LiAl2(OH) 6]nX·qH2O (Xn- = CP -, Br-, NO3,- SO42-) spontaneously lose both Li+ cations and Xn- anions to give crystalline Al(OH)3 on stirring in water. The kinetics of this topochemical de-intercalation reaction have been studied using time-resolved, in-situ energy dispersive X-ray powder diffraction. The temperature dependence of the rate of the de-intercalation reaction yields activation energies of 94 ± 15 kJ mol-1 for mono-dispersed [LiAl2(OH)6]Cl·1.5H2O crystallites (particle size 5-10 μm) and 117 ± 15 kJ mol-1 for poly-dispersed [LiAl2(OH)6]Cl·1.5H2O crystallites (particle size 1-30 μm). The rate of ion de-intercalation was found to decrease as the H2O/LDH ratio decreased. The rate of the de-intercalation has also been shown to be dependent on the interlayer anion, with the reaction rates NO3- > Cl- > Br-. In the case of SO42- rapid de-intercalation only goes to 40% completion. |
| first_indexed | 2024-03-07T02:09:57Z |
| format | Journal article |
| id | oxford-uuid:a048a913-e159-4893-a08b-9ecba06bb734 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T02:09:57Z |
| publishDate | 2004 |
| record_format | dspace |
| spelling | oxford-uuid:a048a913-e159-4893-a08b-9ecba06bb7342022-03-27T02:04:17ZA time resolved, in-situ X-ray diffraction study of the de-intercalation of anions and lithium cations from [LiAl2(OH)(6)](n)X center dot qH(2)O (X = Cl-, Br-, NO3-, SO42-)Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:a048a913-e159-4893-a08b-9ecba06bb734EnglishSymplectic Elements at Oxford2004Tarasov, KIsupov, VChupakhina, LO'Hare, DThe layered double hydroxides (LDHs), [LiAl2(OH) 6]nX·qH2O (Xn- = CP -, Br-, NO3,- SO42-) spontaneously lose both Li+ cations and Xn- anions to give crystalline Al(OH)3 on stirring in water. The kinetics of this topochemical de-intercalation reaction have been studied using time-resolved, in-situ energy dispersive X-ray powder diffraction. The temperature dependence of the rate of the de-intercalation reaction yields activation energies of 94 ± 15 kJ mol-1 for mono-dispersed [LiAl2(OH)6]Cl·1.5H2O crystallites (particle size 5-10 μm) and 117 ± 15 kJ mol-1 for poly-dispersed [LiAl2(OH)6]Cl·1.5H2O crystallites (particle size 1-30 μm). The rate of ion de-intercalation was found to decrease as the H2O/LDH ratio decreased. The rate of the de-intercalation has also been shown to be dependent on the interlayer anion, with the reaction rates NO3- > Cl- > Br-. In the case of SO42- rapid de-intercalation only goes to 40% completion. |
| spellingShingle | Tarasov, K Isupov, V Chupakhina, L O'Hare, D A time resolved, in-situ X-ray diffraction study of the de-intercalation of anions and lithium cations from [LiAl2(OH)(6)](n)X center dot qH(2)O (X = Cl-, Br-, NO3-, SO42-) |
| title | A time resolved, in-situ X-ray diffraction study of the de-intercalation of anions and lithium cations from [LiAl2(OH)(6)](n)X center dot qH(2)O (X = Cl-, Br-, NO3-, SO42-) |
| title_full | A time resolved, in-situ X-ray diffraction study of the de-intercalation of anions and lithium cations from [LiAl2(OH)(6)](n)X center dot qH(2)O (X = Cl-, Br-, NO3-, SO42-) |
| title_fullStr | A time resolved, in-situ X-ray diffraction study of the de-intercalation of anions and lithium cations from [LiAl2(OH)(6)](n)X center dot qH(2)O (X = Cl-, Br-, NO3-, SO42-) |
| title_full_unstemmed | A time resolved, in-situ X-ray diffraction study of the de-intercalation of anions and lithium cations from [LiAl2(OH)(6)](n)X center dot qH(2)O (X = Cl-, Br-, NO3-, SO42-) |
| title_short | A time resolved, in-situ X-ray diffraction study of the de-intercalation of anions and lithium cations from [LiAl2(OH)(6)](n)X center dot qH(2)O (X = Cl-, Br-, NO3-, SO42-) |
| title_sort | time resolved in situ x ray diffraction study of the de intercalation of anions and lithium cations from lial2 oh 6 n x center dot qh 2 o x cl br no3 so42 |
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