H 5 CoW 12 O 40 supported on nano silica from rice husk ash: A green bifunctional catalyst for the reaction of alcohols with cyclic and acyclic 1, 3-dicarbonyl …

E Rafiee, M Khodayari, M Kahrizi, R Tayebee

Index: Rafiee, Ezzat; Khodayari, Maryam; Kahrizi, Masoud; Tayebee, Reza Journal of Molecular Catalysis A: Chemical, 2012 , vol. 358, p. 121 - 128

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Citation Number: 17

Abstract

Rice husk ash (RHA) is an abundant agricultural by-product. The present research work deals with the production of nano silica powders, with high surface area and in amorphous form, from RHA using optimized technique. 12-Tungestocobaltic acid, H5CoW12O40 (CoW), was supported on silica from RHA to produce silica supported CoW (CoW/NSiO2) as a nano catalyst. The characterization data derived from FT-IR reveal that the Keggin structure of ...

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