Title

Solution-Based Chemical Synthesis Of Boehmite Nanofibers And Alumina Nanorods

Abstract

This article reports an easy chemical method of synthesizing boehmite nanofibers by a modified sol-gel process involving aluminum isopropoxide precursor. Nanorods of γ-alumina have been successfully prepared after dehydration of the viscous sol at 600°C for 4 h in air. The boehmite nanofibers and γ-alumina nanorods were characterized by X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy for surface chemistry and functional groups, scanning electron microscopy, high-resolution transmission electron microscopy with selected area electron diffraction, and energy-dispersed spectroscopy for morphology and structure identification. The length of the boehmite nanofibers was found to be more than 10 μm with a crystalline lattice structure. The mechanism of formation of the boehmite nanofibers included the preferential growth along the longitudinal axis due to interaction between the solvent molecules and the surface OH - groups of hydrogen bonds. It is also suggested that the boehmite nanofibers may have formed due to the inherent instability of the planar structure of the boehmite lattice. The diameter of the γ-alumina nanorods was found to be less than 10 nm with a varying length in the range of 50-200 nm. Boehmite to γ-Al 2O 3 transformation was attributed to the loss of water molecules by internal condensation of protons and hydroxyl ions. © 2005 American Chemical Society.

Publication Date

3-10-2005

Publication Title

Journal of Physical Chemistry B

Volume

109

Issue

9

Number of Pages

3868-3872

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1021/jp045706k

Socpus ID

15544367668 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/15544367668

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