کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
171110 458434 2011 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Zirconia-supported Keggin phosphomolybdovanadate nanocomposite: A heterogeneous and reusable catalyst for alkene epoxidation under thermal and ultrasonic irradiation conditions
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Zirconia-supported Keggin phosphomolybdovanadate nanocomposite: A heterogeneous and reusable catalyst for alkene epoxidation under thermal and ultrasonic irradiation conditions
چکیده انگلیسی

Keggin phosphomolybdovanadate, PVMo, was supported on a zirconia matrix by the wet impregnation method. The phase and chemical structure, optical absorption, surface physicochemical properties and morphology of PVMo–ZrO2 composite were studied by X-ray diffraction (XRD) technique, FT-IR and diffuse reflectance UV–vis spectroscopic (DR UV–vis) methods, and scanning electron microscopy (SEM), which indicated that the primary Keggin structure has remained intact after formation of the composite. Moreover, the obtained nanocomposite was used as an efficient catalyst of olefins under reflux and ultrasonic irradiation conditions. The catalyst was reused several times, without observable loss of activity and selectivity. Indeed, the catalytic activity of the PVMo–ZrO2 was compared with pure Keggin phosphomolybdovanadate.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Comptes Rendus Chimie - Volume 14, Issue 6, June 2011, Pages 588–596
نویسندگان
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