[Bmim][TfO] ionic liquid-assisted oriented growth of Co{sub 3}O{sub 4} nanoworms

Journal Article · Fri Feb 15 00:00:00 EST 2013 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2012.11.037· OSTI ID:22215831

Mariappan, Ramalakshmi ^[1]; Mahalingam, Sundrarajan ^[1]

---

1. Advanced Green Chemistry Lab, Department of Industrial Chemistry, Alagappa University, Karaikudi 630 003, Tamil Nadu (India)

Graphical abstract: Display Omitted Highlights: ► First time, we have used [Bmim][TfO]IL for the synthesis of Co{sub 3}O{sub 4} nanoworms. ► IL assists to form oriented growth of cubic Co{sub 3}O{sub 4} nanoworms without intermediate. ► Cubic Co{sub 3}O{sub 4} nanoworms are in the range of 20 nm width and 100–200 nm length. ► IL and oxidizing agent have not altered the Co{sub 3}O{sub 4} structural characteristics. ► Co{sub 3}O{sub 4} nanoworms exhibit crystalline domain dependent weak ferromagnetism. -- Abstract: Monodispersed worm-like structure of Co{sub 3}O{sub 4} nanocrystals of 20 nm width and 100–200 nm length are prepared directly without any intermediate product by 1-n-butyl-3-methylimidazolium trifluoromethane sulfonate ionic liquid ([Bmim][TfO] IL) assisted precipitation method. The higher concentration of [Bmim][TfO] IL in the reaction medium leads to the formation of homogeneous nanoworms. The effect of synthesis temperature and the oxidizing agent (H{sub 2}O{sub 2}) on the Co{sub 3}O{sub 4} particle's morphology and their magnetic properties are discussed. Thermogravimetric analysis (TGA), powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM) analysis were used to characterize the Co{sub 3}O{sub 4} monodispersed nanoworms. The magnetic property of the spinel Co{sub 3}O{sub 4} nanoworms is highly dependent on crystalline domains and exhibits weak ferromagnetic behavior with a narrow hysteresis loop opening.

• OSTI ID: 22215831
• Journal Information: Materials Research Bulletin, Vol. 48, Issue 2; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
ABSORPTION SPECTROSCOPY
COBALT OXIDES
FERROMAGNETISM
FOURIER TRANSFORM SPECTROMETERS
FOURIER TRANSFORMATION
INFRARED SPECTRA
LIQUIDS
MAGNETIC PROPERTIES
NANOSTRUCTURES
OXIDIZERS
SCANNING ELECTRON MICROSCOPY
SYNTHESIS
THERMAL GRAVIMETRIC ANALYSIS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION