Characterization and catalytic activity of vanadia supported on rice husk silica promoted samaria Journal Article


Author(s): Renu, P.; Radhika, T.; Sugunan, S
Article Title: Characterization and catalytic activity of vanadia supported on rice husk silica promoted samaria
Abstract: A series of supported vanadia catalysts (2–10 wt% V2O5) were prepared by wet impregnation method using rice husk silica promoted samaria as the support. Analysis of the catalysts was done by various physicochemical techniques like energy dispersive X-ray analysis (EDX), powder X-ray diffraction (XRD), BET surface area measurements, thermal analysis (TGA/DTA) and UV–Vis diffused reflectance spectroscopy (DR UV–Vis). Temperature programmed desorption (TPD-NH3) of ammonia was employed to quantify the various types of acid sites on the surface of the catalysts. Catalytic activity of these catalysts was studied in liquid phase oxidation of benzyl alcohol with H2O2 as oxidant. The structural characterization of the catalysts suggests the formation of an orthovanadate (SmVO4) type phase at higher loadings of V2O5. The catalytic activity increases with vanadia loading up to 6 wt% V2O5, and further increase reduces the conversion rate as well as selectivity.
Keywords: Supported vanadia; Rice husk silica; SmVO4; Benzyl alcohol oxidation
Journal Title: Catalysis Communications
Volume: 9
Issue: 5
ISSN: 1566-7367
Publisher: Unknown  
Date Published: 2008-03-20
Start Page: 584
End Page: 589
Language: English
Copyright Statement: © Copyright 2008 Elsevier B.V.
Sponsor: Cochin University of Science and Technology
DOI/URL:
Identifier: DOI: 10.1016/j.catcom.2007.02.024