12-Tungstophosphoric acid supported on nano silica from rice husk ash as an efficient catalyst for direct benzylation of 1, 3-dicarbonyl compounds in solvent-free …
…, M Khodayari, S Shahebrahimi, M Joshaghani
Index: Rafiee, Ezzat; Khodayari, Maryam; Shahebrahimi, Shabnam; Joshaghani, Mohammad Journal of Molecular Catalysis A: Chemical, 2011 , vol. 351, p. 204 - 209
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Citation Number: 22
Abstract
Nano silica has been prepared from rice husk, which is an agricultural waste, with high surface area and in amorphous form. 12-Tungstophosphoric acid, H3PW12O40 (PW) has been supported on this silica to produce nano silica supported PW (NPW/SiO2) as a nano catalyst. Characterization of this catalyst has been investigated by TEM, FTIR, and ICP, also, acidic properties have been studied by potentiometric titration method. 40% NPW/SiO2 ...
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