Crystallization control of SrCO{sub 3} nanostructure in imidazolium-based temperature ionic liquids

Journal Article · Thu Nov 15 04:00:00 EST 2012 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2012.08.027· OSTI ID:22215542

Li, Lishuo ^[1]; Lin, Rongyi ^[2]; Tong, Zhangfa; Feng, Qingge ^[1]

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1. School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi, 530004 (China)
2. National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190 (China)

Highlights: ► Nanowhisker, nanospindle, nanosphere, sphere, spindle, rodlike SrCO{sub 3} were obtained. ► Nanowhisker, nanospindle SrCO{sub 3} were auto-assembled in [C{sub 8}mim]BF{sub 4} and [HOEtMIm]NT{sub f2}. ► Small size and rough surface particle show low starting decomposition temperature. ► This method is simple, easy to control in large-scale producing SrCO{sub 3} nanostructure. -- Abstract: Strontium carbonate nanostructures, with unique nanowhisker, nanospindle, nanosphere, sphere, spindle, and rodlike hierarchical structure, were synthesized in imidazolium-based room temperature ionic liquids [C{sub 4}mim]PF{sub 6}, [C{sub 4}mim]Cl, [C{sub 8}mim]Br, [C{sub 8}mim]BF{sub 4}, and [HOEtMIm]NT{sub f2}. The nanostructures were characterized by X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, and thermogravimetric analysis. The results show that the morphologies of SrCO{sub 3} were strongly dependent on the nature of the corresponding RILs, its content, and the reaction temperature. RILs can act as structure-directing agent, leading the auto-assembly of SrCO{sub 3} crystal. [C{sub 8}mim]BF{sub 4} and [HOEtMIm]NT{sub f2} favored the production of nanowhisker and nanospindle SrCO{sub 3}, respectively, whereas [C{sub 4}mim]PF{sub 6} favored the production of nanosphere. Small particles were obtained at high reaction temperature. Low starting decomposition temperature was observed. Finally, the formation mechanism of the SrCO{sub 3} crystal was preliminary presented.

• OSTI ID: 22215542
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 11 Vol. 47; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
CRYSTAL GROWTH
CRYSTALLIZATION
CRYSTALS
DECOMPOSITION
FIELD EMISSION
LIQUIDS
MOLTEN SALTS
NANOSTRUCTURES
SCANNING ELECTRON MICROSCOPY
STRONTIUM CARBONATES
THERMAL GRAVIMETRIC ANALYSIS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION