| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 65360 | Journal of Molecular Catalysis A: Chemical | 2014 | 7 Pages |
•PW/H2N-ZLS is synthesized with a simple impregnation method.•The material has a good inherent ordered hexagonal channel and Keggin structure.•The acetylation of anisole with acetic anhydride was studied under MW condition.•The material shows superior catalytic activity.
Phosphotungstic acid (PW) catalysts supported on amino-functionalized Zr and La incorporated SBA-15 mesoporous materials (PW/H2N-ZLS) were prepared by an impregnation procedure and their physicochemical properties were characterized by FT-IR, XRD, TEM, TG and N2 adsorption–desorption isotherm techniques. It was found that the modified materials still preserved a desirable ordered two-dimensional P6mm hexagonal structure and possessed high specific surface area, large pore volume and narrow pore size distribution and meanwhile the Keggin structure of heteopolyaniona could be retained. Moreover, these catalysts were found to be efficient heterogeneous catalysts for acetylation of anisole with acetic anhydride under microwave irradiation. High yields, short reaction times, easy work-up, easy availability and handling, eco-friendliness and reusability of the catalysts were the main aspects of the present method.
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