Effect of thermal treatment on the textural properties and thermal stability of surface modified zirconia aerogel powders
by Uzma K.H. Bangi; Hae-Noo-Ree Jung; Chang-Sun Park; Dinesh B. Mahadik; Hyung-Ho Park
International Journal of Nanotechnology (IJNT), Vol. 13, No. 4/5/6, 2016

Abstract: In the present investigation, surface modified zirconia aerogel powders were heated at various temperatures to study the effect of thermal treatment on their textural properties and thermal stability. Zirconia aerogel powders were prepared using a sol-gel technique and ambient pressure drying method followed by thermal treatment at various temperatures ranging between 300-800°C under an air atmosphere for 1 h. The synthesised zirconia aerogel powders were characterised by N2 adsorption-desorption analysis, X-ray diffraction (XRD), field-emission scanning electron microscopy, Fourier-transform infra-red spectroscopy, and thermogravimetric differential scanning calorimetry. Thermal treatment causes phase transformation, crystallite growth and agglomeration in zirconia, strongly affecting the pore structure and surface area of zirconia aerogels. From N2 adsorption-desorption analysis, it was observed that the surface area of zirconia aerogel powder suddenly decreased until 500°C, was maintained to 600°C, and decreased again with increasing temperature up to 800°C. The results of XRD plots revealed the amorphous nature of zirconia up to 500°C, which then transformed to a tetragonal phase (at about 600°C), which has large surface area and fairly high thermal stability. The observed surface area of 153 m2/g for the 600°C-annealed zirconia aerogel powder with a tetragonal structure is high enough for catalysis applications.

Online publication date: Mon, 20-Jun-2016

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Nanotechnology (IJNT):
Login with your Inderscience username and password:

    Username:        Password:         

Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com