Hydrocarbon oxidation catalyzed by vanadium polyoxometalate supported on mesoporous MCM-41 under ultrasonic irradiation.
Vanadium polyoxometalate (PVMo) supported on mesoporous MCM-41, MCM-41-NH(2), as efficient and heterogeneous catalysts, with large surface area, for hydrocarbon oxidation with hydrogen peroxide is reported. Oxidation of the alkenes and alkanes gave product selectivities, which are similar to those observed for corresponding homogeneous catalyst. PVMo-MCM was prepared by introduction of PVMo into the mesoporous molecule sieves of MCM-41 by impregnation and adsorption techniques. The samples were characterized by X-ray diffraction (XRD), thermal gravimetric-differential thermal analysis (TG-DTA), FT-IR, scanning electron microscopy (SEM), UV-Vis and cyclic voltametry (CV). Ultrasonic irradiation has a particular effect on MCM-41 structural uniformity and reduced the reaction times and improved the product yields. In addition, the solid catalysts could be recovered and reused several times without loss of its activity.
Tangestaninejad
Shahram
S
Department of Chemistry, Catalysis Division, University of Isfahan, Isfahan 81746-73441, Iran. Electronic address: stanges@sci.ui.ac.ir.
Mirkhani
Valiollah
V
Department of Chemistry, Catalysis Division, University of Isfahan, Isfahan 81746-73441, Iran.
Moghadam
Majid
M
Department of Chemistry, Catalysis Division, University of Isfahan, Isfahan 81746-73441, Iran; Department of Chemistry, Yasouj University, Yasouj 75914-353, Iran.
Mohammadpoor-Baltork
Iraj
I
Department of Chemistry, Catalysis Division, University of Isfahan, Isfahan 81746-73441, Iran.
Shams
Esmaeil
E
Department of Chemistry, Catalysis Division, University of Isfahan, Isfahan 81746-73441, Iran.
Salavati
Hossein
H
Department of Chemistry, Catalysis Division, University of Isfahan, Isfahan 81746-73441, Iran.
D000473:Alkanes / Q000737:chemistry / Q000528:radiation effects; D000475:Alkenes / Q000737:chemistry / Q000528:radiation effects; D002384:Catalysis; D006838:Hydrocarbons / Q000737:chemistry* / Q000528:radiation effects*; D006861:Hydrogen Peroxide; D006900:Hydroxylation; D008855:Microscopy, Electron, Scanning; D010084:Oxidation-Reduction; D012822:Silicon Dioxide / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D017973:Tungsten Compounds / Q000737:chemistry; D014465:Ultrasonics; D014639:Vanadium / Q000737:chemistry*; D000099294:Polyoxometalates
D000473:Alkanes; D000475:Alkenes; D006838:Hydrocarbons; D006861:Hydrogen Peroxide; D012822:Silicon Dioxide; D017973:Tungsten Compounds; D014639:Vanadium; C509968:MCM-41; C102296:polyoxometalate I; D000099294:Polyoxometalates