Hidroksida Berlapis Ganda ZnCrCI: Kesan Haba Terhadap Luas Perm.ukaan dan Keliangan

Hussien, Mohd Zobir and Zainal, Zulkarnain and Ibrahim, Ramli and Hii, Hiong Swee (1996) Hidroksida Berlapis Ganda ZnCrCI: Kesan Haba Terhadap Luas Perm.ukaan dan Keliangan. Pertanika Journal of Science & Technology, 4 (1). pp. 31-39. ISSN 0128-7680

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Abstract

ZnCrCI layered double hydroxides, with Zn/Cr ratios (R) 3 and 4 were prepared by a coprecipitation method and heat treated samples were subsequently prepared. Their bulk structure was investigated by X-ray diffraction and surface area techniques. X-ray diffraction analysis showed that the layered double hydroxide phase remained unchanged upon heating up to 250°C for 5 h in an oven at atmospheric pressure. However, new phases, namely spinel-like and ZnO phases appeared when the samples were heated at 350°C and above for the same duration. The specific surface areas decreased with increasing temperature (between 450850° C) for both R values but no trend was observed for temperatures between 250-350°C. Average pore diameter was found to be optimum at 550°C and 450°C for R = 3 and 4, respectively.

Item Type:Article
Keyword:hidroksida berlapis ganda, luas permukaan, keliangan
Faculty or Institute:Faculty of Environmental Studies
Publisher:Universiti Putra Malaysia Press
ID Code:3225
Deposited By: Nur Izzati Mohd Zaki
Deposited On:24 Nov 2009 07:54
Last Modified:27 May 2013 07:06

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