Rice Husk Ash Modified with Vanadium Pentoxide

Rice husk collected in Barreiras City, Bahia, Brazil was converted to rice husk ash (RHA) by acidic or basic leaching, followed by calcination. The resulting RHA was modified with vanadium pentoxide (2, 5, or 10 mass% of [V.sub.2][O.sub.5]). The modified RHA samples were characterized by X-ray diffr...

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Published inOrbital : The Electronic Journal of Chemistry Vol. 9; no. 2 SI; pp. 111 - 114
Main Authors Rodrigues, Isaias Alves, de Lira, Stefane Oliveira, dos Santos Estrela, Tiago, de Castro, Cailon Franca, Braga, Valdeilson Souza
Format Journal Article
LanguageEnglish
Published Universidade Federal de Mato Grosso do Sul 01.06.2017
Subjects
Armature (Botany)
Ash (Chemistry)
catalysts
Chemical properties
rice husk ash
v2o5
Vanadium
vanadium pentoxide
Brazil
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Summary:Rice husk collected in Barreiras City, Bahia, Brazil was converted to rice husk ash (RHA) by acidic or basic leaching, followed by calcination. The resulting RHA was modified with vanadium pentoxide (2, 5, or 10 mass% of [V.sub.2][O.sub.5]). The modified RHA samples were characterized by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). RHA exhibited FTIR bands associated with silica. After modification of acid-leached RHA with vanadium, the XRD data indicated the formation of [V.sub.2][O.sub.5] phases. Base-leached RHA modified with vanadium pentoxide showed the presence of the [V.sub.2][O.sub.5] phase only in the sample containing 10 mass% [V.sub.2][O.sub.5]. The FTIR data indicated the formation of cristobalite, where bands associated with Si-O-V interactions were observed only for the sample with 10 mass% [V.sub.2][O.sub.5] prepared with acid-leached RHA. Keywords: catalysts; rice husk ash; vanadium pentoxide
ISSN:1984-6428
1984-6428
DOI:10.17807/orbital.v9i2.916