Facile synthesis of pure phase γ-AlOOH and γ-Al2O3 nanofibers in a recoverable ionic liquid via a low temperature route. Issue 127 (11th December 2015)

• Record Type: Journal Article
• Authors: Cai, Yuan; Huang, Huihui; Wang, Lei; Zhang, Xiaojun; Yuan, Yuewei; Li, Rui; Wan, Hui; Guan, Guofeng
• Is Part Of: RSC advances. Volume 5:Issue 127(2015)
• Page Start: 104884
• Page End: 104890
• Publication Date: 2015-12-11
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c5ra20230b
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Mesoporous γ-AlOOH and γ-Al2 O3 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. Abstract : Mesoporous γ-AlOOH and γ-Al2 O3 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 N2 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-Al2 O3 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-Al2 O3 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-Al2 O3 .