Intercluster porous nanocomposites from combination of [AlO₄ Al₁₂(OH)₂₄(H₂O)₁₂]⁷⁺ cation and Anderson-type [Al₁₋ₓ Crₓ Mo₆O₂₄H₆]³⁻ anion: XRD, TG-DTA, SEM-EDAX and EPR studies
The synthesis of intercluster porous nanocomposites obtained from polyoxometallate compounds such as the [AlO₄Al₁₂(OH)₂₄(H₂O)₁₂] ⁷⁺ cation (named Al₁₃) and the Anderson-type [Al₁₋ₓ Crₓ Mo₆O₂₄H₆ ]³⁻ anion [Al₁₋ₓ Crₓ Mo₆O₂₄H₆] has been performed in order to study the interaction between the two cluste...
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| Autores principales: | , , , , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
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2007
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/137939 |
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I19-R120-10915-137939 |
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dspace |
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Universidad Nacional de La Plata |
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I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Química Nanocomposites Interclusters Inorganic materials Pillared compounds |
| spellingShingle |
Química Nanocomposites Interclusters Inorganic materials Pillared compounds Cabello, Carmen Inés Botto, Irma Lía Filace, Ricardo Julián Cordischi, Dante Minelli, Giuliano Occhiuzzi, Manlio Porta, Piero Intercluster porous nanocomposites from combination of [AlO₄ Al₁₂(OH)₂₄(H₂O)₁₂]⁷⁺ cation and Anderson-type [Al₁₋ₓ Crₓ Mo₆O₂₄H₆]³⁻ anion: XRD, TG-DTA, SEM-EDAX and EPR studies |
| topic_facet |
Química Nanocomposites Interclusters Inorganic materials Pillared compounds |
| description |
The synthesis of intercluster porous nanocomposites obtained from polyoxometallate compounds such as the [AlO₄Al₁₂(OH)₂₄(H₂O)₁₂] ⁷⁺ cation (named Al₁₃) and the Anderson-type [Al₁₋ₓ Crₓ Mo₆O₂₄H₆ ]³⁻ anion [Al₁₋ₓ Crₓ Mo₆O₂₄H₆] has been performed in order to study the interaction between the two cluster ions, the stability of the XMo₆ planar configuration, the products obtained after thermal treatment, the structure and the local symmetry of the Cr³⁺ species. Chemical, thermal, structural and spectroscopic characterizations of the original and thermally treated phases have been followed by different techniques such as TG-DTA, XRD, SEM-EDAX, and mainly by EPR.
All the results have shown that the structure of the intercluster nanocomposites (Al₁₃)(Al₁₋ₓ Crₓ Mo₆)₂ precursors is similar to that reported by Son et al. for the chromium-free (Al₁₃)(AlMo₆)₂ intercluster nanocomposite [Son et al., J.
Am. Chem. Soc. 122 (2000) 7432]. After thermal treatment in air at several temperatures of the (Al₁₃)(Al₁₋ₓ Crₓ Mo₆)₂ nanocomposites the following phases have been observed and characterised: (i) at 400 ºC an amorphous phase containing dispersed Cr³⁺ ions; (ii) at 700 C a crystalline phase corresponding to Cr₂(MoO₄)₃/Al₂(MoO₄)₃ solid solutions; (iii) at 950 ºC αAl₂O₃/Cr₂O₃ solid solutions with a random dispersion of the Cr³⁺ ions. |
| format |
Articulo Articulo |
| author |
Cabello, Carmen Inés Botto, Irma Lía Filace, Ricardo Julián Cordischi, Dante Minelli, Giuliano Occhiuzzi, Manlio Porta, Piero |
| author_facet |
Cabello, Carmen Inés Botto, Irma Lía Filace, Ricardo Julián Cordischi, Dante Minelli, Giuliano Occhiuzzi, Manlio Porta, Piero |
| author_sort |
Cabello, Carmen Inés |
| title |
Intercluster porous nanocomposites from combination of [AlO₄ Al₁₂(OH)₂₄(H₂O)₁₂]⁷⁺ cation and Anderson-type [Al₁₋ₓ Crₓ Mo₆O₂₄H₆]³⁻ anion: XRD, TG-DTA, SEM-EDAX and EPR studies |
| title_short |
Intercluster porous nanocomposites from combination of [AlO₄ Al₁₂(OH)₂₄(H₂O)₁₂]⁷⁺ cation and Anderson-type [Al₁₋ₓ Crₓ Mo₆O₂₄H₆]³⁻ anion: XRD, TG-DTA, SEM-EDAX and EPR studies |
| title_full |
Intercluster porous nanocomposites from combination of [AlO₄ Al₁₂(OH)₂₄(H₂O)₁₂]⁷⁺ cation and Anderson-type [Al₁₋ₓ Crₓ Mo₆O₂₄H₆]³⁻ anion: XRD, TG-DTA, SEM-EDAX and EPR studies |
| title_fullStr |
Intercluster porous nanocomposites from combination of [AlO₄ Al₁₂(OH)₂₄(H₂O)₁₂]⁷⁺ cation and Anderson-type [Al₁₋ₓ Crₓ Mo₆O₂₄H₆]³⁻ anion: XRD, TG-DTA, SEM-EDAX and EPR studies |
| title_full_unstemmed |
Intercluster porous nanocomposites from combination of [AlO₄ Al₁₂(OH)₂₄(H₂O)₁₂]⁷⁺ cation and Anderson-type [Al₁₋ₓ Crₓ Mo₆O₂₄H₆]³⁻ anion: XRD, TG-DTA, SEM-EDAX and EPR studies |
| title_sort |
intercluster porous nanocomposites from combination of [alo₄ al₁₂(oh)₂₄(h₂o)₁₂]⁷⁺ cation and anderson-type [al₁₋ₓ crₓ mo₆o₂₄h₆]³⁻ anion: xrd, tg-dta, sem-edax and epr studies |
| publishDate |
2007 |
| url |
http://sedici.unlp.edu.ar/handle/10915/137939 |
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