Facile synthesis of pure phase γ-AlOOH and γ-Al 2 O 3 nanofibers in a recoverable ionic liquid via a low temperature route
Mesoporous γ-AlOOH and γ-Al 2 O 3 with fibrous morphology were successfully synthesized by an ionic liquid ([OMim]Br) assisted low temperature precipitation method using aluminum nitrate and ammonia as aluminum source and precipitant, respectively. The samples were characterized by XRD, TG, FT-IR, T...
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Veröffentlicht in: | RSC advances 2015, Vol.5 (127), p.104884-104890 |
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Hauptverfasser: | , , , , , , , |
Format: | Artikel |
Sprache: | eng |
Online-Zugang: | Volltext |
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Zusammenfassung: | Mesoporous γ-AlOOH and γ-Al
2
O
3
with fibrous morphology were successfully synthesized by an ionic liquid ([OMim]Br) assisted low temperature precipitation method using aluminum nitrate and ammonia as aluminum source and precipitant, respectively. The samples were characterized by XRD, TG, FT-IR, TEM, and N
2
adsorption–desorption technique. The results showed that the concentration of [OMim]Br had a significant effect on the phase, porous structure, and morphology of γ-Al
2
O
3
due to the strong interactions between [OMim]Br and γ-AlOOH. High purity γ-AlOOH was synthesized at 0.2 M [OMim]Br and γ-Al
2
O
3
with a specific surface area of 243.53 m
2
g
−1
, pore volume of 0.68 cm
3
g
−1
, and average pore size of 11.10 nm was obtained after calcination. Furthermore, the recyclability of [OMim]Br was investigated. The recovery rate of [OMim]Br could reach 95.0 wt%, and the recycled [OMim]Br still had effects on the synthesis of γ-AlOOH and γ-Al
2
O
3
. |
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ISSN: | 2046-2069 2046-2069 |
DOI: | 10.1039/C5RA20230B |