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Research Papers

Sol–Gel Synthesis of Alumina–Titania Nanostructure Membrane: Preparation and Characterization

[+] Author and Article Information
S. Akbarnezhad, S. Kiani

Department of Chemical Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, Iran; Membrane Processes and Membrane Research Center, Department of Chemical Engineering, Faculty of Engineering,  Ferdowsi University of Mashhad, Mashhad, Iran

S. M. Mousavi

Department of Chemical Engineering,  Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, Iran

M. Pakizeh1

Department of Chemical Engineering, Faculty of Engineering,  Ferdowsi University of Mashhad, Mashhad, Iranpakizeh@um.ac.ir

1

Corresponding author.

J. Nanotechnol. Eng. Med 2(3), 031004 (Jan 10, 2012) (5 pages) doi:10.1115/1.4004311 History: Received March 24, 2011; Revised May 05, 2011; Published January 10, 2012; Online January 10, 2012

In the present paper, the preparation and characterization of porous alumina–titania nanostructure membrane is described. The membrane layers consisted of an α-alumina membrane support, which was dip-coated with a composite alumina–titania top layer prepared in a sol–gel process. Thermogravimetric analysis showed that drying progress of the membrane layer is completed at about 560 °C. Scanning electron microscopy analysis displayed a smooth and defect-free layer of alumina–titania membrane after calcination at 600 °C. X-ray diffraction analysis showed the formation of gamma and orthorhombic alumina, brookite titania, and aluminium titanate (Al2 TiO5 ) after the calcination step. Transmission electron microscopy analysis showed that the alumina–titania composite particle size was almost below 40 nm. The Brunauer–Emmet–Teller (BET) surface area, average pore size, and thickness of the membrane top layer were determined to be 292 m2 /g, 2.2 nm, and 4 μm, respectively.

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Copyright © 2011 by American Society of Mechanical Engineers
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Figures

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Figure 2

XRD pattern of alumina–titania nanoparticles calcinated at 600 °C

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Figure 3

TEM image of alumina–titania nanoparticles calcinated at 600 °C

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Figure 4

SEM images of supported alumina–titania ceramic membrane calcinated at 600 °C: (a) surface and (b) cross-section

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Figure 5

Adsorption–desorption isotherm of alumina–titania membrane top layer calcinated at 600 °C

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Figure 6

Pore size distribution of alumina–titania membrane top layer calcinated at 600 °C

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Figure 1

TGA curve for alumina–titania nonsupported membrane

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