The Malaysian Journal of Analytical Sciences Vol 11 No 1 (2007): 160 – 165

 

 

INFLUENCE OF ORGANIC SPECIES ON THE CHARACTERISTICS OF

Mo-V OXIDES

 

P.M. Woi, R. Irmawati and Y.H. Taufiq -Yap

 

Department of Chemistry, Faculty of Science, Universiti Putra Malaysia,

43400 UPM Serdang, Selangor, Malaysia

 

Abstract

This study  investigates  on the effect of organic species on the characteristics of molybdenum-vanadium  mixed oxide catalysts. The MoV precursors were prepared by homogeneous precipitation method using urea hydrolysis. The oxides were later treated with three organic species namely polyvinyl alcohol (PVA), malic  acid (MA) and adipic acid (AA). The solutions were refluxed in a prescribed time. The solid obtained were calcined and subsequently denoted as MoV(PVA), MoV(MA) and MoV(AA). Interesting results in which high surface area values (SBET) were obtained in the range between 10 to 20 m² g^-1. XRD reckoned the samples are in highly crystalline form. H₂-Temperature programmed reduction analysis showed that the total number of oxygen removed are 1.4 x 10²²  atoms g^-1, 3.3 x 10²²   atoms g^-1 and 1.8 x 10²²  atoms g^-1 for MoV(PVA), MoV(MA) and MoV(AA) respectively.

 

Keywords: Mo-V oxides, homogeneous precipitation, organic species, H₂-TPR

 

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