Solid State Science and Technology, Vol. 15, No 2 (2007) 9-15

ISSN 0128-7389


Tan Yee Wean and Irmawati Ramli

Department of Chemistry, Faculty of Science,

Universiti Putra Malaysia, 43400 Serdang, Selangor Darul Ehsan.



In this study, molybdenum-vanadium oxide samples were prepared via reflux method. Urea and hexane were applied in the mixture in order to improve the physicochemical properties of the mixed oxide. A control sample without the presence of organic species was also prepared. X-ray diffraction analysis showed that the precursors were in a complex mixed phases. All of the precursors were calcined in N2 flow at 573, 623, 673, 723 and 773 K for 2 hours. Calcined samples were denoted as Contcalc, Urcalc and Hexcalc. Samples calcined at 573 K were still in a complex mixed phases. When calcined at 623 K, Contcalc and Hexcalc showed a hexagonal MoVOx phase while Urcalc was in a monoclinic MoOx phase. However, calcination at 773 K has managed to transform all samples into the monoclinic MoOx phase. On specific surface area analysis, Urcalc gave the highest value, which was 10.8 m2g-1.



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