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

文献索引：Rafiee, Ezzat; Khodayari, Maryam; Shahebrahimi, Shabnam; Joshaghani, Mohammad Journal of Molecular Catalysis A: Chemical, 2011 , vol. 351, p. 204 - 209

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被引用次数: 22

摘要

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 ...